Ccna Flashcards
Which two traffic types use the Real-Time Transport Protocol (RTP)? (Choose two.)
video
web
file transfer
voice
peer to peer
Video
Voice
- Which wireless technology has low-power and data rate requirements making it popular in home automation applications?
ZigBee
LoRaWAN
5G
Wi-Fi
Zigbee
Which layer of the TCP/IP model provides a route to forward messages through an internetwork?
application
network access
internet
transport
Internet
Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?
DNS
email
file
web
DNS
What are proprietary protocols?
protocols developed by private organizations to operate on any vendor hardware
protocols that can be freely used by any organization or vendor
protocols developed by organizations who have control over their definition and operation
a collection of protocols known as the TCP/IP protocol suite
protocols developed by organizations who have control over their definition and operation
What service is provided by DNS?
Resolves domain names, such as cisco.com, into IP addresses.
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
Allows for data transfers between a client and a file server.
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
Resolves domain names, such as cisco.com, into IP addresses
A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
DNS
DHCP
SMTP
POP3
POP3
What command can be used on a Windows PC to see the IP configuration of that computer?
show ip interface brief
ping
show interfaces
ipconfig
ipconfig
A wired laser printer is attached to a home computer. That printer has been shared so that other computers on the home network can also use the printer. What networking model is in use?
client-based
master-slave
point-to-point
peer-to-peer (P2P)
peer-to-peer (P2P)
What characteristic describes a virus?
a network device that filters access and traffic coming into a network
the use of stolen credentials to access private data
an attack that slows or crashes a device or network service
malicious software or code running on an end device
malicious software or code running on an end device
Three bank employees are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?
financial transactions, web page, audio conference
audio conference, financial transactions, web page
financial transactions, audio conference, web page
audio conference, web page, financial transactions
audio conference, financial transactions, web page
. Refer to the exhibit. If Host1 were to transfer a file to the server, what layers of the TCP/IP model would be used?
only application and Internet layers
only Internet and network access layers
only application, Internet, and network access layers
application, transport, Internet, and network access layers
only application, transport, network, data link, and physical layers
application, session, transport, network, data link, and physical layers
application, transport, Internet, and network access layers
Cut-through Store-and-forward
low latency always stores the entire frame
may forward runt frames checks the CRC before forwarding
begins forwarding when the destination address is received checks the frame length before forwarding
Refer to the exhibit. The IP address of which device interface should be used as the default gateway setting of host H1?
R1: S0/0/0
R2: S0/0/1
R1: G0/0
R2: S0/0/0
R1: G0/0
What service is provided by Internet Messenger?
An application that allows real-time chatting among remote users.
Allows remote access to network devices and servers.
Resolves domain names, such as cisco.com, into IP addresses.
Uses encryption to provide secure remote access to network devices and servers.
An application that allows real-time chatting among remote users.
Refer to the exhibit. Which protocol was responsible for building the table that is shown?
DHCP
ARP
DNS
ICMP
ARP
- A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)
crosstalk
extended length of cabling
RFI
EMI
signal attenuation
RFI
EMI
A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?
(A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in the ARP cache. How will the device obtain a destination MAC address?)
It will send the frame and use its own MAC address as the destination.
It will send an ARP request for the MAC address of the destination device.
It will send the frame with a broadcast MAC address.
It will send a request to the DNS server for the destination MAC address.
It will send an ARP request for the MAC address of the default gateway.
It will send an ARP request for the MAC address of the default gateway
A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
NetBIOS (NetBT)
POP3
IMAP
DNS
- A network administrator is adding a new LAN to a branch office. The new LAN must support 25 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.224
What characteristic describes a Trojan horse?
malicious software or code running on an end device
an attack that slows or crashes a device or network service
the use of stolen credentials to access private data
a network device that filters access and traffic coming into a network
malicious software or code running on an end device
What service is provided by HTTPS?
Uses encryption to provide secure remote access to network devices and servers.
Resolves domain names, such as cisco.com, into IP addresses.
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
Allows remote access to network devices and servers.
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
A technician with a PC is using multiple applications while connected to the Internet. How is the PC able to keep track of the data flow between multiple application sessions and have each application receive the correct packet flows?
The data flow is being tracked based on the destination MAC address of the technician PC.
The data flow is being tracked based on the source port number that is used by each application.
The data flow is being tracked based on the source IP address that is used by the PC of the technician.
The data flow is being tracked based on the destination IP address that is used by the PC of the technician.
The data flow is being tracked based on the source port number that is used by each application.
A network administrator is adding a new LAN to a branch office. The new LAN must support 61 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.240
255.255.255.224
255.255.255.192
255.255.255.128
255.255.255.192
What characteristic describes a DoS attack?
the use of stolen credentials to access private data
a network device that filters access and traffic coming into a network
software that is installed on a user device and collects information about the user
an attack that slows or crashes a device or network service
an attack that slows or crashes a device or network service
What service is provided by SMTP?
Allows clients to send email to a mail server and the servers to send email to other servers.
Allows remote access to network devices and servers.
Uses encryption to provide secure remote access to network devices and servers.
An application that allows real-time chatting among remote users.
Allows clients to send email to a mail server and the servers to send email to other servers.
Which scenario describes a function provided by the transport layer?
A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.
A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
. What does the term “attenuation” mean in data communication?
strengthening of a signal by a networking device
leakage of signals from one cable pair to another
time for a signal to reach its destination
loss of signal strength as distance increases
loss of signal strength as distance increases
Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?
The entire command, configure terminal, must be used.
The administrator is already in global configuration mode.
The administrator must first enter privileged EXEC mode before issuing the command.
The administrator must connect via the console port to access global configuration mode.
The administrator must first enter privileged EXEC mode before issuing the command.
Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
TCP
IP
UDP
POP
DNS
Ethernet
POP
DNS
A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?
automation
accounting
authentication
authorization
authorization
What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.)
message size
message encoding
connector specifications
media selection
delivery options
end-device installation
message size
message encoding
delivery options
- What are two characteristics of IP? (Choose two.)
does not require a dedicated end-to-end connection
operates independently of the network media
retransmits packets if errors occur
re-assembles out of order packets into the correct order at the receiver end
guarantees delivery of packets
does not require a dedicated end-to-end connection
operates independently of the network media
An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees.
What three network characteristics are described in this scenario? (Choose three.)
security
quality of service
scalability
powerline networking
integrity
fault tolerance
security
quality of service
fault tolerance
What are two common causes of signal degradation when using UTP cabling? (Choose two.)
improper termination
low-quality shielding in cable
installing cables in conduit
low-quality cable or connectors
loss of light over long distances
improper termination
low-quality cable or connectors
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
192.168.1.32/27
192.168.1.32/28
192.168.1.64/29
192.168.1.64/26
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)
This host does not have a default gateway configured.
There are 4 hops between this device and the device at 192.168.100.1.
There is connectivity between this device and the device at 192.168.100.1.
The connectivity between these two hosts allows for videoconferencing calls.
The average transmission time between the two hosts is 2 milliseconds.
There are 4 hops between this device and the device at 192.168.100.1.
There is connectivity between this device and the device at 192.168.100.1.
Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)
Capture traffic on the weekends when most employees are off work.
Capture traffic during peak utilization times to get a good representation of the different traffic types.
Only capture traffic in the areas of the network that receive most of the traffic such as the data center.
Perform the capture on different network segments.
Only capture WAN traffic because traffic to the web is responsible for the largest amount of traffic on a network.
Capture traffic during peak utilization times to get a good representation of the different traffic types.
Perform the capture on different network segments.
What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?
All router interfaces will be automatically activated.
The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.
Each router interface will generate an IPv6 link-local address.
It statically creates a global unicast address on this router.
The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages
Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)
application
network
data link
session
presentation
transport
session
presentation
application
Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?
nothing, because the router has a route to the destination network
open the header and use it to determine whether the data is to be sent out S0/0/0
open the header and replace the destination MAC address with a new one
remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0
remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with other hosts in the local network.
The host cannot communicate with hosts in other networks.
A ping from the host to 127.0.0.1 would not be successful.
The host will have to use ARP to determine the correct address of the default gateway.
The switch will not forward packets initiated by the host.
The host cannot communicate with hosts in other networks
What are two features of ARP? (Choose two.)
When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.
An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.
If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
A network administrator is adding a new LAN to a branch office. The new LAN must support 90 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.128
255.255.255.240
255.255.255.248
255.255.255.224
255.255.255.128
What are two ICMPv6 messages that are not present in ICMP for IPv4? (Choose two.)
Neighbor Solicitation
Destination Unreachable
Host Confirmation
Time Exceeded
Router Advertisement
Route Redirection
Neighbor Solicitation
Router Advertisement
A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?
DHCP
SMTP
DNS
HTTP
Http
. What is an advantage for small organizations of adopting IMAP instead of POP?
POP only allows the client to store messages in a centralized way, while IMAP allows distributed storage.
Messages are kept in the mail servers until they are manually deleted from the email client.
When the user connects to a POP server, copies of the messages are kept in the mail server for a short time, but IMAP keeps them for a long time.
IMAP sends and retrieves email, but POP only retrieves email.
Messages are kept in the mail servers until they are manually deleted from the email client.
A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?
tracert
ipconfig
netstat
nslookup
nslookup
Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
implements CSMA/CD over legacy shared half-duplex media
enables IPv4 and IPv6 to utilize the same physical medium
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper
implements a process to delimit fields within an Ethernet 2 frame
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
enables IPv4 and IPv6 to utilize the same physical medium
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?
The switch can communicate with other hosts on the 172.16.100.0 network.
The switch can be remotely managed from a host on another network.
The switch is limited to sending and receiving frames to and from the gateway 172.16.100.1.
The switch will have a management interface with the address 172.16.100.1.
The switch can be remotely managed from a host on another network.
What happens when the transport input ssh command is entered on the switch vty lines?
The SSH client on the switch is enabled.
The switch requires a username/password combination for remote access.
Communication between the switch and remote users is encrypted.
The switch requires remote connections via a proprietary client software.
Communication between the switch and remote users is encrypted.
A disgruntled employee is using some free wireless networking tools to determine information about the enterprise wireless networks. This person is planning on using this information to hack the wireless network. What type of attack is this?
DoS
access
reconnaissance
Trojan horse
reconnaissance
What service is provided by HTTP?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
Allows for data transfers between a client and a file server.
An application that allows real-time chatting among remote users.
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
. A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
FTP
DHCP
Telnet
SSH
DHCP
What are two problems that can be caused by a large number of ARP request and reply messages? (Choose two.)
Switches become overloaded because they concentrate all the traffic from the attached subnets.
The ARP request is sent as a broadcast, and will flood the entire subnet.
The network may become overloaded because ARP reply messages have a very large payload due to the 48-bit MAC address and 32-bit IP address that they contain.
A large number of ARP request and reply messages may slow down the switching process, leading the switch to make many changes in its MAC table.
All ARP request messages must be processed by all nodes on the local network.
The ARP request is sent as a broadcast, and will flood the entire subnet.
All ARP request messages must be processed by all nodes on the local network.
. A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? (Choose three.)
netsh interface ipv6 show neighbor
arp -a
tracert
ping
ipconfig
nslookup
telnet
ping
ipconfig
nslookup
During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?
analyze the destination IP address
switch the packet to the directly connected interface
look up the next-hop address for the packet
discard the traffic after consulting the route table
switch the packet to the directly connected interface
What characteristic describes antispyware?
applications that protect end devices from becoming infected with malicious software
a network device that filters access and traffic coming into a network
software on a router that filters traffic based on IP addresses or applications
a tunneling protocol that provides remote users with secure access into the network of an organization
applications that protect end devices from becoming infected with malicious software
A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?
Telnet
AUX
SSH
Console
SSH
What are the two most effective ways to defend against malware? (Choose two.)
Implement a VPN.
Implement network firewalls.
Implement RAID.
Implement strong passwords.
Update the operating system and other application software.
Install and update antivirus software.
Update the operating system and other application software.
Install and update antivirus software.
Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?
brute-force attack
Trojan horse
DoS
buffer overflow
Trojan horse
Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?
User Datagram Protocol field
transport layer error check field
flow control field
frame check sequence field
error correction process field
frame check sequence field
A network administrator is adding a new LAN to a branch office. The new LAN must support 4 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.248
255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.248
What service is provided by POP3?
Retrieves email from the server by downloading the email to the local mail application of the client.
An application that allows real-time chatting among remote users.
Allows remote access to network devices and servers.
Uses encryption to provide secure remote access to network devices and servers.
Retrieves email from the server by downloading the email to the local mail application of the client.
What two security solutions are most likely to be used only in a corporate environment? (Choose two.)
antispyware
virtual private networks
intrusion prevention systems
strong passwords
antivirus software
virtual private networks
intrusion prevention systems
What characteristic describes antivirus software?
applications that protect end devices from becoming infected with malicious software
a network device that filters access and traffic coming into a network
a tunneling protocol that provides remote users with secure access into the network of an organization
software on a router that filters traffic based on IP addresses or applications
applications that protect end devices from becoming infected with malicious software
What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
It checks the value of the TTL field and if it is 0, it discards the packet and sends a Destination Unreachable message to the source host.
It checks the value of the TTL field and if it is 100, it discards the packet and sends a Destination Unreachable message to the source host.
It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
It increments the value of the TTL field by 1 and if the result is 100, it discards the packet and sends a Parameter Problem message to the source host.
It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
DNS
DHCP
SMTP
TFTP
TFTP
An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections? (Choose three.)
Configure DNS on the router.
Generate two-way pre-shared keys.
Configure the IP domain name on the router.
Generate the SSH keys.
Enable inbound vty SSH sessions.
Enable inbound vty Telnet sessions.
Configure the IP domain name on the router.
Generate the SSH keys.
Enable inbound vty SSH sessions.
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
handles communication between upper layer networking software and Ethernet NIC hardware
implements trailer with frame check sequence for error detection
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
implements a process to delimit fields within an Ethernet 2 frame
adds Ethernet control information to network protocol data
implements trailer with frame check sequence for error detection
responsible for internal structure of Ethernet frame
An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet?
all IPv6 enabled devices on the local link
all IPv6 DHCP servers
all IPv6 enabled devices across the network
all IPv6 configured routers on the local link
all IPv6 configured routers on the local link
What are the three parts of an IPv6 global unicast address? (Choose three.)
subnet ID
subnet mask
broadcast address
global routing prefix
interface ID
subnet ID
global routing prefix
interface ID
A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)
extensive cabling
mobility options
packet collision
interference
security
coverage area
interference
security
coverage area
. A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
Enter CTRL-Z at the privileged mode prompt.
Exit global configuration mode.
Power cycle the device.
Reboot the device.
Exit privileged EXEC mode and press Enter .
Exit privileged EXEC mode and press Enter .
What method is used to manage contention-based access on a wireless network?
token passing
CSMA/CA
priority ordering
CSMA/CD
CSMA/CA
What is a function of the data link layer?
provides the formatting of data
provides end-to-end delivery of data between hosts
provides delivery of data between two applications
provides for the exchange of frames over a common local media
provides for the exchange of frames over a common local media
What is the purpose of the TCP sliding window?
to ensure that segments arrive in order at the destination
to end communication when data transmission is complete
to inform a source to retransmit data from a specific point forward
to request that a source decrease the rate at which it transmits data
to request that a source decrease the rate at which it transmits data
What characteristic describes spyware?
a network device that filters access and traffic coming into a network
software that is installed on a user device and collects information about the user
an attack that slows or crashes a device or network service
the use of stolen credentials to access private data
software that is installed on a user device and collects information about the user
Which switching method drops frames that fail the FCS check?
store-and-forward switching
borderless switching
ingress port buffering
cut-through switching
store-and-forward switching
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FEC0::/10
FDEE::/7
FE80::/10
FF00::/8
FE80::/10
What service is provided by FTP?
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
An application that allows real-time chatting among remote users.
Allows for data transfers between a client and a file server.
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
Allows for data transfers between a client and a file server.
. A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)
DNS server
source port number
HTTP server
source MAC address
default gateway
DNS server
default gateway
Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)
NAT adds authentication capability to IPv4.
NAT introduces problems for some applications that require end-to-end connectivity.
NAT will impact negatively on switch performance.
NAT provides a solution to slow down the IPv4 address depletion.
NAT improves packet handling.
NAT causes routing tables to include more information.
NAT introduces problems for some applications that require end-to-end connectivity.
NAT provides a solution to slow down the IPv4 address depletion.
What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 when the interface ID is generated by using the EUI-64 process?
0C6F:65FF:FEC2:BDF8
1E6F:65FF:FEC2:BDF8
C16F:65FF:FEC2:BDF8
106F:65FF:FEC2:BDF8
1E6F:65FF:FEC2:BDF8
. Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?
PC2 will send an ARP reply with the PC2 MAC address.
What service is provided by BOOTP?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
Allows for data transfers between a client and a file server.
Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.
What characteristic describes adware?
a network device that filters access and traffic coming into a network
software that is installed on a user device and collects information about the user
the use of stolen credentials to access private data
an attack that slows or crashes a device or network service
software that is installed on a user device and collects information about the user
When a switch configuration includes a user-defined error threshold on a per-port basis, to which switching method will the switch revert when the error threshold is reached?
cut-through
store-and-forward
fast-forward
fragment-free
store-and-forward
What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.)
error detection
frame delimiting
accessing the media
data encapsulation
logical addressing
accessing the media
data encapsulation
Refer to the exhibit. What three facts can be determined from the viewable output of the show ip interface brief command? (Choose three.)
The switch can be remotely managed.
One device is attached to a physical interface.
The default SVI has been configured.
. What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48::/64
2001:DA48:FC5::A4:/64
2001:DA48:FC5:A4::/64
2001::/64
2001:DA48:FC5:A4::/64
addressing This field helps to direct the frame toward its destination.
frame start This field identifies the beginning of a frame
type This field is used by the LLC to identify the Layer 3 protocol.
error detection This field checks if the frame has been damaged during the transfer
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48::/64
2001:DA48:FC5::A4:/64
2001:DA48:FC5:A4::/64
2001::/64
2001:DA48:FC5:A4::/64
application filtering prevents access by port number
packet filtering prevents access based on IP or MAC address
stateful packet inspection prevents unsolicited incoming sessions
URL filtering prevents access to websites
Users are reporting longer delays in authentication and in accessing network resources during certain time periods of the week. What kind of information should network engineers check to find out if this situation is part of a normal network behavior?
syslog records and messages
the network performance baseline
debug output and packet captures
network configuration files
the network performance baseline
How does the service password-encryption command enhance password security on Cisco routers and switches?
It requires encrypted passwords to be used when connecting remotely to a router or switch with Telnet.
It encrypts passwords that are stored in router or switch configuration files.
It requires that a user type encrypted passwords to gain console access to a router or switch.
It encrypts passwords as they are sent across the network.
It encrypts passwords that are stored in router or switch configuration files
Which two statements are correct in a comparison of IPv4 and IPv6 packet headers? (Choose two.)
The Source Address field name from IPv4 is kept in IPv6.
The Version field from IPv4 is not kept in IPv6.
The Destination Address field is new in IPv6.
The Header Checksum field name from IPv4 is kept in IPv6.
The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.
The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.
The Source Address field name from IPv4 is kept in IPv6
. A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices:
IP phones – 22 addresses
PCs – 20 addresses needed
Printers – 2 addresses needed
Scanners – 2 addresses needed
The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?
255.255.255.192
255.255.255.252
255.255.255.240
255.255.255.248
255.255.255.0
255.255.255.224
255.255.255.224
What characteristic describes identity theft?
the use of stolen credentials to access private data
software on a router that filters traffic based on IP addresses or applications
software that identifies fast-spreading threats
a tunneling protocol that provides remote users with secure access into the network of an organization
the use of stolen credentials to access private data
. A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.240
255.255.255.0
255.255.255.248
255.255.255.224
255.255.255.0
What are three commonly followed standards for constructing and installing cabling? (Choose three.)
cost per meter (foot)
cable lengths
connector color
pinouts
connector types
tensile strength of plastic insulator
pinouts
connector types
cable lengths
Refer to the exhibit. What is wrong with the displayed termination?
The woven copper braid should not have been removed.
The wrong type of connector is being used.
The untwisted length of each wire is too long.
The wires are too thick for the connector that is used.
The untwisted length of each wire is too long.
A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
IMAP
FTP
SSH
Telnet
IMAP
What are two characteristics shared by TCP and UDP? (Choose two.)
default window size
connectionless communication
port numbering
3-way handshake
ability to to carry digitized voice
use of checksum
port numbering
use of checksum
Refer to the exhibit. Which two network addresses can be assigned to the network containing 10 hosts? Your answers should waste the fewest addresses, not reuse addresses that are already assigned, and stay within the 10.18.10.0/24 range of addresses. (Choose two.)
10.18.10.200/28
10.18.10.208/28
10.18.10.240/27
10.18.10.200/27
10.18.10.224/27
10.18.10.224/28
10.18.10.208/28
10.18.10.224/28
A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?
FTP
LDAP
SLP
SNMP
FTP
What attribute of a NIC would place it at the data link layer of the OSI model?
attached Ethernet cable
IP address
MAC address
RJ-45 port
TCP/IP protocol stack
MAC address
. A network administrator is adding a new LAN to a branch office. The new LAN must support 10 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.192
255.255.255.248
255.255.255.224
255.255.255.240
255.255.255.240
What technique is used with UTP cable to help protect against signal interference from crosstalk?
wrapping a foil shield around the wire pairs
twisting the wires together into pairs
terminating the cable with special grounded connectors
encasing the cables within a flexible plastic sheath
twisting the wires together into pairs
Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?
IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33
Refer to the exhibit. The switches are in their default configuration. Host A needs to communicate with host D, but host A does not have the MAC address for its default gateway. Which network hosts will receive the ARP request sent by host A?
only hosts B, C, and router R1
Refer to the exhibit. A network engineer has been given the network address of 192.168.99.0 and a subnet mask of 255.255.255.192 to subnet across the four networks shown. How many total host addresses are unused across all four subnets?
i304957v1n1_209418.png
88
200
72
224
158
200
client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
SSH
SMB/CIFS
HTTPS
SLP
SSH
What characteristic describes an IPS?
a tunneling protocol that provides remote users with secure access into the network of an organization
a network device that filters access and traffic coming into a network
software that identifies fast-spreading threats
software on a router that filters traffic based on IP addresses or applications
a network device that filters access and traffic coming into a network
What service is provided by DHCP?
An application that allows real-time chatting among remote users.
Allows remote access to network devices and servers.
Dynamically assigns IP addresses to end and intermediary devices.
Uses encryption to provide secure remote access to network devices and servers.
Dynamically assigns IP addresses to end and intermediary devices.
Users report that the network access is slow. After questioning the employees, the network administrator learned that one employee downloaded a third-party scanning program for the printer. What type of malware might be introduced that causes slow performance of the network?
virus
worm
phishing
spam
worm
. A user is executing a tracert to a remote device. At what point would a router, which is in the path to the destination device, stop forwarding the packet?
when the router receives an ICMP Time Exceeded message
when the RTT value reaches zero
when the host responds with an ICMP Echo Reply message
when the value in the TTL field reaches zero
when the values of both the Echo Request and Echo Reply messages reach zero
when the value in the TTL field reaches zero
. A network technician is researching the use of fiber optic cabling in a new technology center. Which two issues should be considered before implementing fiber optic media? (Choose two.)
Fiber optic cabling requires different termination and splicing expertise from what copper cabling requires.
Fiber optic cabling requires specific grounding to be immune to EMI.
Fiber optic cabling is susceptible to loss of signal due to RFI.
Fiber optic cable is able to withstand rough handling.
Fiber optic provides higher data capacity but is more expensive than copper cabling.
Fiber optic cabling requires different termination and splicing expertise from what copper cabling requires.
Fiber optic provides higher data capacity but is more expensive than copper cabling.
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
Header Length
Differentiated Services
Time-to-Live
Fragment Offset
Time-to-Live
A user is complaining that an external web page is taking longer than normal to load.The web page does eventually load on the user machine. Which tool should the technician use with administrator privileges in order to locate where the issue is in the network?
ping
nslookup
tracert
ipconfig /displaydns
tracert
What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.)
IP addresses
interface descriptions
MAC addresses
next-hop addresses
Layer 1 statuses
speed and duplex settings
Layer 1 statuses
IP addresses
What single subnet mask would be appropriate to use for the three subnetworks?
255.255.255.0
255.255.255.240
255.255.255.248
255.255.255.252
255.255.255.240
Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?
255.255.255.128
Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)
The source port field identifies the running application or service that will handle data returning to the PC.
The TCP process running on the PC randomly selects the destination port when establishing a session with the server.
UDP segments are encapsulated within IP packets for transport across the network.
The UDP destination port number identifies the application or service on the server which will handle the data.
TCP is the preferred protocol when a function requires lower network overhead.
The TCP source port number identifies the sending host on the network.
UDP segments are encapsulated within IP packets for transport across the network.
The UDP destination port number identifies the application or service on the server which will handle the data.
The source port field identifies the running application or service that will handle data returning to the PC.
What is an advantage to using a protocol that is defined by an open standard?
A company can monopolize the market.
The protocol can only be run on equipment from a specific vendor.
An open standard protocol is not controlled or regulated by standards organizations.
It encourages competition and promotes choices.
It encourages competition and promotes choices.
A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?
the network domain of the destination host
the IP address of the default gateway
the MAC address of the destination host
the MAC address of the default gateway
the MAC address of the default gateway
Why would a Layer 2 switch need an IP address?
to enable the switch to send broadcast frames to attached PCs
to enable the switch to function as a default gateway
to enable the switch to be managed remotely
to enable the switch to receive frames from attached PCs
to enable the switch to be managed remotely
What characteristic describes a VPN?
software on a router that filters traffic based on IP addresses or applications
software that identifies fast-spreading threats
a tunneling protocol that provides remote users with secure access into the network of an organization
a network device that filters access and traffic coming into a network
a tunneling protocol that provides remote users with secure access into the network of an organization
Which two statements describe features of an IPv4 routing table on a router? (Choose two.)
If a default static route is configured in the router, an entry will be included in the routing table with source code S
It stores information about routes derived from the active router interfaces
What are two functions that are provided by the network layer? (Choose two.)
directing data packets to destination hosts on other networks
placing data on the network medium
carrying data between processes that are running on source and destination hosts
providing dedicated end-to-end connections
providing end devices with a unique network identifier
directing data packets to destination hosts on other networks
providing end devices with a unique network identifier
Which two commands can be used on a Windows host to display the routing table? (Choose two.) netstat -s
route print
show ip route
netstat -r
tracert
route print
netstat -r
Which information does the show startup-config command display?
the IOS image copied into RAM
the bootstrap program in the ROM
the contents of the current running configuration file in the RAM
the contents of the saved configuration file in the NVRAM
the contents of the saved configuration file in the NVRAM
What are three characteristics of the CSMA/CD process? (Choose three.)
The device with the electronic token is the only one that can transmit after a collision.
A device listens and waits until the media is not busy before transmitting.
After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
All of the devices on a segment see data that passes on the network medium.
A jam signal indicates that the collision has cleared and the media is not busy.
Devices can be configured with a higher transmission priority.
A device listens and waits until the media is not busy before transmitting.
After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
All of the devices on a segment see data that passes on the network medium.
What is one main characteristic of the data link layer?
It generates the electrical or optical signals that represent the 1 and 0 on the media.
It converts a stream of data bits into a predefined code.
It shields the upper layer protocol from being aware of the physical medium to be used in the communication.
It accepts Layer 3 packets and decides the path by which to forward the packet to a remote network.
It shields the upper layer protocol from being aware of the physical medium to be used in the communication.
Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)
Destination IP addresses in a packet header remain constant along the entire path to a target host.
Destination MAC addresses will never change in a frame that goes across seven routers.
Every time a frame is encapsulated with a new destination MAC address, a new destination IP address is needed.
Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.
A packet that has crossed four routers has changed the destination IP address four times.
Destination IP addresses in a packet header remain constant along the entire path to a target host.
Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.
What is a benefit of using cloud computing in networking?
Technology is integrated into every-day appliances allowing them to interconnect with other devices, making them more ‘smart’ or automated.
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
End users have the freedom to use personal tools to access information and communicate across a business network.
Home networking uses existing electrical wiring to connect devices to the network wherever there is an electrical outlet, saving the cost of installing data cables.
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?
DD:DD:DD:DD:DD:DD
172.168.10.99
CC:CC:CC:CC:CC:CC
172.168.10.65
BB:BB:BB:BB:BB:BB
AA:AA:AA:AA:AA:AA
BB:BB:BB:BB:BB:BB
What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?
255.255.255.0
255.255.255.240
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.192
An organization is assigned an IPv6 address block of 2001:db8:0:ca00::/56. How many subnets can be created without using bits in the interface ID space?
256
512
1024
4096
256
Two pings were issued from a host on a local network. The first ping was issued to the IP address of the default gateway of the host and it failed. The second ping was issued to the IP address of a host outside the local network and it was successful. What is a possible cause for the failed ping?
The default gateway is not operational.
The default gateway device is configured with the wrong IP address.
Security rules are applied to the default gateway device, preventing it from processing ping requests.
The TCP/IP stack on the default gateway is not working properly.
Security rules are applied to the default gateway device, preventing it from processing ping requests.
A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
It must send a DHCPv6 INFORMATION-REQUEST message to request the address of the DNS server.
It must send a DHCPv6 REQUEST message to the DHCPv6 server to request permission to use this address.
It must send an ICMPv6 Router Solicitation message to determine what default gateway it should use.
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
What two ICMPv6 message types must be permitted through IPv6 access control lists to allow resolution of Layer 3 addresses to Layer 2 MAC addresses? (Choose two.)
neighbor solicitations
echo requests
neighbor advertisements
echo replies
router solicitations
router advertisements
neighbor solicitations
neighbor advertisements
Which wireless technology has low-power and low-data rate requirements making it popular in IoT environments?
Bluetooth
Zigbee
WiMAX
Wi-Fi
Zigbee
