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Networking Revamped > Module 13 - 18 exams > Flashcards

Module 13 - 18 exams Flashcards

1
Q

Which protocol is used by the traceroute command to send and receive echo-requests and echo-replies?

SNMP
ICMP
Telnet
TCP

A

ICMP

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2
Q

Which ICMPv6 message is sent when the IPv6 hop limit field of a packet is decremented to zero and the packet cannot be forwarded?

network unreachable
time exceeded
protocol unreachable
port unreachable

A

time exceeded

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3
Q

A user executes a traceroute over IPv6. At what point would a router in the path to the destination device drop the packet?

when the value of the Hop Limit field reaches 255
when the value of the Hop Limit field reaches zero
when the router receives an ICMP time exceeded message
when the target host responds with an ICMP echo reply message

A

when the value of the Hop Limit field reaches zero

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4
Q

What is the purpose of ICMP messages?

to inform routers about network topology changes
to ensure the delivery of an IP packet
to provide feedback of IP packet transmissions
to monitor the process of a domain name to IP address resolution

A

to provide feedback of IP packet transmissions

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5
Q

What source IP address does a router use by default when the traceroute command is issued?

the highest configured IP address on the router
a loopback IP address
the IP address of the outbound interface
the lowest configured IP address on the router

A

the IP address of the outbound interface

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6
Q

A user issues a ping 192.135.250.103 command and receives a response that includes a code of 1. What does this code represent?

host unreachable
protocol unreachable
port unreachable
network unreachable

A

host unreachable

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7
Q

A user issues a ping 2001:db8:FACE:39::10 command and receives a response that includes a code of 3. What does this code represent?

address unreachable
network unreachable
host unreachable
protocol unreachable

A

address unreachable

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8
Q

A user issues a ping 192.135.250.103 command and receives a response that includes a code of 1 . What does this code represent?

host unreachable
beyond scope of the source address
address unreachable
communication with the destination administratively prohibited

A

host unreachable

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9
Q

A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 3 . What does this code represent?

address unreachable
communication with the destination administratively prohibited
beyond scope of the source address
no route to destination

A

address unreachable

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10
Q

A user issues a ping 10.10.14.67 command and receives a response that includes a code of 0 . What does this code represent?

network unreachable
protocol unreachable
port unreachable
host unreachable

A

network unreachable

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11
Q

A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 4. What does this code represent?
A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 4 . What does this code represent?

port unreachable
host unreachable
protocol unreachable
network unreachable

A

port unreachable

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12
Q

A user issues a ping 198.133.219.8 command and receives a response that includes a code of 0 . What does this code represent?

network unreachable
protocol unreachable
port unreachable
host unreachable

A

network unreachable

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13
Q

A user issues a ping 2001:db8:3040:114::88 command and receives a response that includes a code of 4 . What does this code represent?

port unreachable
host unreachable
protocol unreachable
network unreachable

A

port unreachable

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14
Q

A user issues a ping 2001:db8:FACE:39::10 command and receives a response that includes a code of 2. What does this code represent?

beyond scope of the source address
host unreachable
protocol unreachable
network unreachable

A

beyond scope of the source address

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15
Q

A user issues a ping 2001:db8:FACE:39::10 command and receives a response that includes a code of 2 . What does this code represent?

beyond scope of the source address
communication with the destination administratively prohibited
address unreachable
no route to destination

A

beyond scope of the source address

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16
Q

Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

The client sets the window size for the session.
The client sends an ISN to the server to start the 3-way handshake.
The client randomly selects a source port number.
The client sends a synchronization segment to begin the session.

A

The client randomly selects a source port number.

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17
Q

Which transport layer feature is used to guarantee session establishment?

UDP ACK flag
TCP 3-way handshake
UDP sequence number
TCP port number

A

TCP 3-way handshake

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18
Q

What is the complete range of TCP and UDP well-known ports?

0 to 255
0 to 1023
256 – 1023
1024 – 49151

A

0 to 1023

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19
Q

What is a socket?

the combination of the source and destination IP address and source and destination Ethernet address
the combination of a source IP address and port number or a destination IP address and port number
the combination of the source and destination sequence and acknowledgment numbers
the combination of the source and destination sequence numbers and port numbers

A

the combination of a source IP address and port number or a destination IP address and port number

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19
Q

Which factor determines TCP window size?
the amount of data to be transmitted
the number of services included in the TCP segment
the amount of data the destination can process at one time
the amount of data the source is capable of sending at one time

A

the amount of data the destination can process at one time

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20
Q

A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

1 segment
10 segments
100 segments
1000 segments

A

10 segments

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21
Q

What does a client do when it has UDP datagrams to send?

It just sends the datagrams.
It queries the server to see if it is ready to receive data.
It sends a simplified three-way handshake to the server.
It sends to the server a segment with the SYN flag set to synchronize the conversation.

A

It just sends the datagrams.

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22
Q

Which three fields are used in a UDP segment header? (Choose three.)

Window Size
Length
Source Port
Acknowledgment Number
Checksum
Sequence Number

A
  • Length
  • Source Port
  • Checksum
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23
Q

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
timing and synchronization
destination and source port numbers
destination and source physical addresses
destination and source logical network addresses

A

destination and source port numbers

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24
Q

What are two roles of the transport layer in data communication on a network? (Choose two.)

identifying the proper application for each communication stream
tracking the individual communication between applications on the source and destination hosts
providing frame delimiting to identify bits making up a frame
performing a cyclic redundancy check on the frame for errors
providing the interface between applications and the underlying network over which messages are transmitted

A
  • identifying the proper application for each communication stream
  • tracking the individual communication between applications on the source and destination hosts
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25
Q

Which two characteristics are associated with UDP sessions? (Choose two.)

Destination devices receive traffic with minimal delay.
Transmitted data segments are tracked.
Destination devices reassemble messages and pass them to an application.
Received data is unacknowledged.
Unacknowledged data packets are retransmitted.

A
  • Destination devices receive traffic with minimal delay.
  • Received data is unacknowledged.
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26
Q

What information is used by TCP to reassemble and reorder received segments?

port numbers
sequence numbers
acknowledgment numbers
fragment numbers

A

sequence numbers

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27
Q

Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?
HTTP
FTP
DNS
SMTP

A

DNS

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28
Q

Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?
FIN
ACK
SYN
RST

A

ACK

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29
Q

What is a characteristic of UDP?

UDP datagrams take the same path and arrive in the correct order at the destination.​
Applications that use UDP are always considered unreliable.​
UDP reassembles the received datagrams in the order they were received.
UDP only passes data to the network when the destination is ready to receive the data.

A

UDP reassembles the received datagrams in the order they were received.

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30
Q

Which three application layer protocols use TCP? (Choose three.)

SMTP
FTP
SNMP
HTTP
TFTP
DHCP

A
  • SMTP
  • FTP
  • HTTP
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31
Q

What kind of port must be requested from IANA in order to be used with a specific application?

registered port
private port
dynamic port
source port

A

registered port

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32
Q

Which three statements characterize UDP? (Choose three.)

UDP provides basic connectionless transport layer functions.
UDP provides connection-oriented, fast transport of data at Layer 3.
UDP relies on application layer protocols for error detection.
UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
UDP relies on IP for error detection and recovery.
UDP provides sophisticated flow control mechanisms.

A
  • UDP provides basic connectionless transport layer functions.
  • UDP relies on application layer protocols for error detection.
  • UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
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33
Q

Which two fields are included in the TCP header but not in the UDP header? (Choose two.)
window
checksum
source port
destination port
sequence number

A
  • window
  • sequence number
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34
Q

Which field in the TCP header indicates the status of the three-way handshake process?

window
reserved
checksum
control bits

A

control bits

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35
Q

Why does HTTP use TCP as the transport layer protocol?

to ensure the fastest possible download speed
because HTTP is a best-effort protocol
because transmission errors can be tolerated easily
because HTTP requires reliable delivery

A

because HTTP requires reliable delivery

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36
Q

What is true about the Server Message Block protocol?

Different SMB message types have a different format.
Clients establish a long term connection to servers.
SMB messages cannot authenticate a session.
SMB uses the FTP protocol for communication.

A

Clients establish a long term connection to servers.

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36
Q

How are port numbers used in the TCP/IP encapsulation process?

Source port numbers and destination port numbers are not necessary when UDP is the transport layer protocol being used for the communication.
Source port and destination port numbers are randomly generated.
If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations.
Destination port numbers are assigned automatically and cannot be changed.

A

If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations.

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36
Q

In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two.)

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated
when a faster delivery mechanism is needed
when delivery overhead is not an issue
when applications do not need to guarantee delivery of the data
when destination port numbers are dynamic

A
  • when a faster delivery mechanism is needed
  • when applications do not need to guarantee delivery of the data
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36
Q

What are three responsibilities of the transport layer? (Choose three.)

meeting the reliability requirements of applications, if any
multiplexing multiple communication streams from many users or applications on the same network
identifying the applications and services on the client and server that should handle transmitted data
directing packets towards the destination network
formatting data into a compatible form for receipt by the destination devices
conducting error detection of the contents in frames

A
  • meeting the reliability requirements of applications, if any
  • multiplexing multiple communication streams from many users or applications on the same network
  • identifying the applications and services on the client and server that should handle transmitted data
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37
Q

Which two types of applications are best suited for UDP? (Choose two.)
applications that need data flow control
applications that require reliable delivery
applications that handle reliability themselves
applications that need the reordering of segments
applications that can tolerate some data loss, but require little or no delay

A
  • applications that handle reliability themselves
  • applications that can tolerate some data loss, but require little or no delay
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38
Q

Which two protocols may devices use in the application process that sends email? (Choose two.)

HTTP
SMTP
POP
IMAP
DNS
POP3

A
  • SMTP
  • DNS
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39
Q

Which three statements describe a DHCP Discover message? (Choose three.)
The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).
The destination IP address is 255.255.255.255.
The message comes from a server offering an IP address.
The message comes from a client seeking an IP address.
All hosts receive the message, but only a DHCP server replies.
Only the DHCP server receives the message.

A
  • The destination IP address is 255.255.255.255.
  • The message comes from a client seeking an IP address.
  • All hosts receive the message, but only a DHCP server replies.
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40
Q

What is the function of the HTTP GET message?

to request an HTML page from a web server
to send error information from a web server to a web client
to upload content to a web server from a web client
to retrieve client email from an email server using TCP port 110

A

to request an HTML page from a web server

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41
Q

Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted?

application
presentation
session
transport

A

application

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42
Q

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?

peer-to-peer
master-slave
client/server
point-to-point

A

client/server

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43
Q

What do the client/server and peer-to-peer network models have in common?

Both models have dedicated servers.
Both models support devices in server and client roles.
Both models require the use of TCP/IP-based protocols.
Both models are used only in the wired network environment.

A

Both models support devices in server and client roles.

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44
Q

In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?

peer-to-peer
client-based
master-slave
point-to-point

A

peer-to-peer

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45
Q

What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza?

Ethernet
Gnutella
POP
SMTP

A

Gnutella

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46
Q

What is a key characteristic of the peer-to-peer networking model?
wireless networking
social networking without the Internet
network printing using a print server
resource sharing without a dedicated server

A

resource sharing without a dedicated server

47
Q

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)

physical
session
network
presentation
data link
transport
application

A
  • session
  • presentation
  • application
48
Q

What is an example of network communication that uses the client-server model?

A user uses eMule to download a file that is shared by a friend after the file location is determined.
A workstation initiates an ARP to find the MAC address of a receiving host.
A user prints a document by using a printer that is attached to a workstation of a coworker.
A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

A

A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

49
Q

Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data?

internetwork
session
presentation
application
network access

A

application

50
Q

What is an advantage of SMB over FTP?​

Only with SMB can data transfers occur in both directions.
Only SMB establishes two simultaneous connections with the client, making the data transfer faster.​
SMB is more reliable than FTP because SMB uses TCP and FTP uses UDP.​
SMB clients can establish a long-term connection to the server.​

A

SMB clients can establish a long-term connection to the server.​

51
Q

A manufacturing company subscribes to certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)

FTP
HTTP
DNS
SNMP
DHCP
SMTP

A
  • FTP
  • HTTP
  • SMTP
52
Q

Which application layer protocol uses message types such as GET, PUT, and POST?
DNS
DHCP
SMTP
HTTP
POP3

A

HTTP

53
Q

What type of information is contained in a DNS MX record?

the FQDN of the alias used to identify a service
the IP address for an FQDN entry
the domain name mapped to mail exchange servers
the IP address of an authoritative name server

A

the domain name mapped to mail exchange servers

54
Q

Which three protocols operate at the application layer of the TCP/IP model? (Choose three.)

ARP
TCP
UDP
FTP
POP3
DHCP

A
  • FTP
  • POP3
  • DHCP
55
Q

Which protocol is used by a client to communicate securely with a web server?

SMTP
SMB
IMAP
HTTPS

A

HTTPS

55
Q

Which applications or services allow hosts to act as client and server at the same time?

client/server applications
email applications
P2P applications
authentication services

A

P2P applications

56
Q

What are two characteristics of peer-to-peer networks? (Choose two.)
scalability
one way data flow
decentralized resources
centralized user accounts
resource sharing without a dedicated server

A
  • decentralized resources
  • resource sharing without a dedicated server
57
Q

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

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.

58
Q

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)

physical layer
session layer
transport layer
application layer
presentation layer
data link layer

A
  • session layer
  • application layer
  • presentation layer
59
Q

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received three packets of data from the PC?

4501
6001
6000
4500

A

4501

60
Q

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received four packets of data from the PC?

6001
3001
1501
1500

A

6001

61
Q

Which component is designed to protect against unauthorized communications to and from a computer?

security center
port scanner
antimalware
antivirus
firewall

A

firewall

62
Q

What type of attack may involve the use of tools such as nslookup and fping?

access attack
reconnaissance attack
denial of service attack
worm attack

A

reconnaissance attack

62
Q

What is the purpose of the network security accounting function?

to require users to prove who they are
to determine which resources a user can access
to keep track of the actions of a user
to provide challenge and response questions

A

to keep track of the actions of a user

62
Q

Which command will block login attempts on RouterA for a period of 30 seconds if there are 2 failed login attempts within 10 seconds?

RouterA(config)# login block-for 10 attempts 2 within 30
RouterA(config)# login block-for 30 attempts 2 within 10
RouterA(config)# login block-for 2 attempts 30 within 10
RouterA(config)# login block-for 30 attempts 10 within 2

A

RouterA(config)# login block-for 30 attempts 2 within 10

63
Q

Which example of malicious code would be classified as a Trojan horse?

malware that was written to look like a video game
malware that requires manual user intervention to spread between systems
malware that attaches itself to a legitimate program and spreads to other programs when launched
malware that can automatically spread from one system to another by exploiting a vulnerability in the target

A

malware that was written to look like a video game

63
Q

Which attack involves a compromise of data that occurs between two end points?

denial-of-service
man-in-the-middle attack
extraction of security parameters
username enumeration

A

man-in-the-middle attack

64
Q

What is the difference between a virus and a worm?

Viruses self-replicate but worms do not.
Worms self-replicate but viruses do not.
Worms require a host file but viruses do not.
Viruses hide in legitimate programs but worms do not.

A

Worms self-replicate but viruses do not.

65
Q

Which type of attack involves an adversary attempting to gather information about a network to identify vulnerabilities?

reconnaissance
DoS
dictionary
man-in-the-middle

A

reconnaissance

66
Q

What is the purpose of the network security authentication function?

to require users to prove who they are
to determine which resources a user can access
to keep track of the actions of a user
to provide challenge and response questions

A

to require users to prove who they are

66
Q

When applied to a router, which command would help mitigate brute-force password attacks against the router?

exec-timeout 30
service password-encryption
banner motd $Max failed logins = 5$
login block-for 60 attempts 5 within 60

A

login block-for 60 attempts 5 within 60

66
Q

Which firewall feature is used to ensure that packets coming into a network are legitimate responses to requests initiated from internal hosts?

stateful packet inspection
URL filtering
application filtering
packet filtering

A

stateful packet inspection

67
Q

What feature of SSH makes it more secure than Telnet for a device management connection?

confidentiality with IPsec
stronger password requirement
random one-time port connection
login information and data encryption

A

login information and data encryption

68
Q

What is the advantage of using SSH over Telnet?

SSH is easier to use.
SSH operates faster than Telnet.
SSH provides secure communications to access hosts.
SSH supports authentication for a connection request.

A

SSH provides secure communications to access hosts.

69
Q

What is the role of an IPS?

detecting and blocking of attacks in real time
connecting global threat information to Cisco network security devices
authenticating and validating traffic
filtering of nefarious websites

A

detecting and blocking of attacks in real time

70
Q

A user is redesigning a network for a small company and wants to ensure security at a reasonable price. The user deploys a new application-aware firewall with intrusion detection capabilities on the ISP connection. The user installs a second firewall to separate the company network from the public network. Additionally, the user installs an IPS on the internal network of the company. What approach is the user implementing?

attack based
risk based
structured
layered

A

layered

71
Q

What is an accurate description of redundancy?

configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination
configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered
designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork
designing a network to use multiple paths between switches to ensure there is no single point of failure

A

designing a network to use multiple paths between switches to ensure there is no single point of failure

72
Q

A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? (Choose two.)

voice
video
instant messaging
FTP
SNMP

A
  • voice
  • video
73
Q

What is the purpose of a small company using a protocol analyzer utility to capture network traffic on the network segments where the company is considering a network upgrade?

to identify the source and destination of local network traffic
to capture the Internet connection bandwidth requirement
to document and analyze network traffic requirements on each network segment
to establish a baseline for security analysis after the network is upgraded

A

to document and analyze network traffic requirements on each network segment

74
Q

Which method is used to send a ping message specifying the source address for the ping?

Issue the ping command from within interface configuration mode.
Issue the ping command without specifying a destination IP address.
Issue the ping command without extended commands.
Issue the ping command after shutting down un-needed interfaces.

A

Issue the ping command without specifying a destination IP address.

75
Q

A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?

a change in the bandwidth according to the show interfaces output
a next-hop timeout from a traceroute
an increase in host-to-host ping response times
a change in the amount of RAM according to the show version output

A

an increase in host-to-host ping response times

75
Q

A user reports a lack of network connectivity. The technician takes control of the user machine and attempts to ping other computers on the network and these pings fail. The technician pings the default gateway and that also fails. What can be determined for sure by the results of these tests?

The NIC in the PC is bad.
The TCP/IP protocol is not enabled.
The router that is attached to the same network as the workstation is down.
Nothing can be determined for sure at this point.

A

Nothing can be determined for sure at this point.

76
Q

Which statement is true about Cisco IOS ping indicators?​

‘!’ indicates that the ping was unsuccessful and that the device may have issues finding a DNS server.
‘U’ may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful.
‘.’ indicates that the ping was successful but the response time was longer than normal.
A combination of ‘.’ and ‘!’ indicates that a router along the path did not have a route to the destination address and responded with an ICMP unreachable message.​

A

‘U’ may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful.

77
Q

A network technician issues the C:> tracert -6 www.cisco.com command on a Windows PC. What is the purpose of the -6 command option?

It forces the trace to use IPv6.
It limits the trace to only 6 hops.
It sets a 6 milliseconds timeout for each replay.
It sends 6 probes within each TTL time period.

A

It forces the trace to use IPv6.

78
Q

Why would a network administrator use the tracert utility?

to determine the active TCP connections on a PC
to check information about a DNS name in the DNS server
to identify where a packet was lost or delayed on a network
to display the IP address, default gateway, and DNS server address for a PC

A

to identify where a packet was lost or delayed on a network

79
Q

A ping fails when performed from router R1 to directly connected router R2. The network administrator then proceeds to issue the show cdp neighbors command. Why would the network administrator issue this command if the ping failed between the two routers?

The network administrator suspects a virus because the ping command did not work.
The network administrator wants to verify Layer 2 connectivity.
The network administrator wants to verify the IP address configured on router R2.
The network administrator wants to determine if connectivity can be established from a non-directly connected network.

A

The network administrator wants to verify Layer 2 connectivity.

80
Q

A network engineer is troubleshooting connectivity issues among interconnected Cisco routers and switches. Which command should the engineer use to find the IP address information, host name, and IOS version of neighboring network devices?

show version
show ip route
show interfaces
show cdp neighbors detail

A

show cdp neighbors detail

81
Q

Which command should be used on a Cisco router or switch to allow log messages to be displayed on remotely connected sessions using Telnet or SSH?

debug all
logging synchronous
show running-config​
terminal monitor

A

terminal monitor

81
Q

What information about a Cisco router can be verified using the show version command?

the routing protocol version that is enabled
the value of the configuration register
the operational status of serial interfaces
the administrative distance used to reach networks

A

the value of the configuration register

82
Q

Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?

terminal monitor
logging console
logging buffered
logging synchronous

A

terminal monitor

83
Q

By following a structured troubleshooting approach, a network administrator identified a network issue after a conversation with the user. What is the next step that the administrator should take?

Verify full system functionality.
Test the theory to determine cause.
Establish a theory of probable causes.
Establish a plan of action to resolve the issue.

A

Establish a theory of probable causes.

84
Q

Users are complaining that they are unable to browse certain websites on the Internet. An administrator can successfully ping a web server via its IP address, but cannot browse to the domain name of the website. Which troubleshooting tool would be most useful in determining where the problem is?

netstat
tracert
nslookup
ipconfig

A

nslookup

84
Q

An employee complains that a Windows PC cannot connect to the Internet. A network technician issues the ipconfig command on the PC and is shown an IP address of 169.254.10.3. Which two conclusions can be drawn? (Choose two.)

The PC cannot contact a DHCP server.
The DNS server address is misconfigured.
The default gateway address is not configured.
The PC is configured to obtain an IP address automatically.
The enterprise network is misconfigured for dynamic routing.

A
  • The PC cannot contact a DHCP server.
  • The PC is configured to obtain an IP address automatically.
85
Q

What is considered the most effective way to mitigate a worm attack?

Change system passwords every 30 days.
Ensure that all systems have the most current virus definitions.
Ensure that AAA is configured in the network.
Download security updates from the operating system vendor and patch all vulnerable systems.

A

Download security updates from the operating system vendor and patch all vulnerable systems.

85
Q

When configuring SSH on a router to implement secure network management, a network engineer has issued the login local and transport input ssh line vty commands. What three additional configuration actions have to be performed to complete the SSH configuration? (Choose three.)

Set the user privilege levels.
Generate the asymmetric RSA keys.
Configure the correct IP domain name.
Configure role-based CLI access.
Create a valid local username and password database.
Manually enable SSH after the RSA keys are generated.

A
  • Generate the asymmetric RSA keys.
  • Configure the correct IP domain name.
    Configure role-based CLI access.
  • Create a valid local username and password database.
85
Q

Which network service automatically assigns IP addresses to devices on the network?

DHCP
Telnet
DNS
traceroute

A

DHCP

86
Q

Which command can an administrator execute to determine what interface a router will use to reach remote networks?

show arp
show interfaces
show ip route
show protocols

A

show ip route

87
Q

On which two interfaces or ports can security be improved by configuring executive timeouts? (Choose two.)

Fast Ethernet interfaces
console ports
serial interfaces
vty ports
loopback interfaces

A
  • console ports
  • vty ports
88
Q

technician is to document the current configurations of all network devices in a college, including those in off-site buildings. Which protocol would be best to use to securely access the network devices?

FTP
HTTP
SSH
Telnet

A

SSH

89
Q

Which statement describes the ping and tracert commands?

Tracert shows each hop, while ping shows a destination reply only.
Tracert uses IP addresses; ping does not.
Both ping and tracert can show results in a graphical display.
Ping shows whether the transmission is successful; tracert does not.

A

Tracert shows each hop, while ping shows a destination reply only.

90
Q

An administrator decides to use “WhatAreyouwaiting4” as the password on a newly installed router. Which statement applies to the password choice?

It is strong because it uses a passphrase.
It is weak because it is often the default password on new devices.
It is weak since it uses easily found personal information.
It is weak since it is a word that is easily found in the dictionary.

A

It is strong because it uses a passphrase.

91
Q

An administrator decides to use “pR3s!d7n&0” as the password on a newly installed router. Which statement applies to the password choice?

It is strong because it uses a minimum of 10 numbers, letters and special characters.
It is weak because it is often the default password on new devices.
It is weak since it uses easily found personal information.
It is weak since it is a word that is easily found in the dictionary

A

It is strong because it uses a minimum of 10 numbers, letters and special characters.

92
Q

An administrator decides to use “5$7*4#033!” as the password on a newly installed router. Which statement applies to the password choice?

It is strong because it contains 10 numbers and special characters.
It is weak because it is often the default password on new devices.
It is weak since it uses easily found personal information.
It is strong because it uses a minimum of 10 numbers, letters and special characters.

A

It is strong because it contains 10 numbers and special characters.

93
Q

An administrator decides to use “pR3s!d7n&0” as the password on a newly installed router. Which statement applies to the password choice?

It is strong because it uses a minimum of 10 numbers, letters and special characters.
It is weak since it is a word that is easily found in the dictionary.
It is strong because it uses a passphrase.
It is strong because it contains 10 numbers and special characters.

A

It is strong because it uses a minimum of 10 numbers, letters and special characters.

94
Q

An administrator decides to use “12345678!” as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it uses a series of numbers or letters.
It is strong because it uses a passphrase.
It is weak since it is a word that is easily found in the dictionary.
It is strong because it uses a minimum of 10 numbers, letters and special characters.

A

It is weak because it uses a series of numbers or letters.

95
Q

An administrator decides to use “admin” as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it is often the default password on new devices.
It is strong because it uses a passphrase.
It is strong because it uses a minimum of 10 numbers, letters and special characters.
It is strong because it contains 10 numbers and special characters.

A

It is weak because it is often the default password on new devices.

96
Q

An administrator decides to use “Feb121978” as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it uses easily found personal information.
It is strong because it uses a passphrase.
It is weak since it is a word that is easily found in the dictionary.
It is strong because it uses a minimum of 10 numbers, letters and special characters.

A

It is weak because it uses easily found personal information.

97
Q

An administrator decides to use “password” as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it is a commonly used password.
It is weak since it is a word that is easily found in the dictionary.
It is strong because it uses a passphrase.
It is strong because it uses a minimum of 10 numbers, letters and special characters.

A

It is weak because it is a commonly used password.

97
Q

An administrator decides to use “RobErT” as the password on a newly installed router. Which statement applies to the password choice?

It is weak since it uses easily found personal information.
It is strong because it uses a passphrase.
It is strong because it uses a minimum of 10 numbers, letters and special characters.
It is strong because it contains 10 numbers and special characters.

A

It is weak since it uses easily found personal information.

98
Q

An administrator decides to use “Elizabeth” as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it uses easily found personal information.
It is strong because it uses a passphrase.
It is weak since it is a word that is easily found in the dictionary.
It is strong because it uses a minimum of 10 numbers, letters and special characters.

A

It is weak because it uses easily found personal information.

98
Q

A network technician is troubleshooting an issue and needs to verify the IP addresses of all interfaces on a router. What is the best command to use to accomplish the task?

show ip interface brief
nslookup
ipconfig getifaddr en0
show ip route

A

show ip interface brief

99
Q

Students who are connected to the same switch are having slower than normal response times. The administrator suspects a duplex setting issue. What is the best command to use to accomplish the task?

show interfaces
ipconfig getifaddr en0
copy running-config startup-config
show ip nat translations

A

show interfaces

100
Q

A student wants to save a router configuration to NVRAM. What is the best command to use to accomplish the task?

copy running-config startup-config
show interfaces
show ip nat translations
show ip route

A

copy running-config startup-config

100
Q

A support technician needs to know the IP address of the wireless interface on a MAC. What is the best command to use to accomplish the task?

ipconfig getifaddr en0
copy running-config startup-config
show interfaces
show ip nat translations

A

ipconfig getifaddr en0

100
Q

A user wants to know the IP address of the PC. What is the best command to use to accomplish the task?

ipconfig
copy running-config startup-config
show interfaces
show ip nat translations

A

ipconfig

100
Q

Only employees connected to IPv6 interfaces are having difficulty connecting to remote networks. The analyst wants to verify that IPv6 routing has been enabled. What is the best command to use to accomplish the task?

show running-config
show interfaces
copy running-config startup-config
show ip nat translations

A

show running-config

101
Q

An administrator is troubleshooting connectivity issues and needs to determine the IP address of a website. What is the best command to use to accomplish the task?

nslookup
show ipv6 route
show ipv6 interface
copy startup-config running-config

A

nslookup

101
Q

A network technician is troubleshooting an issue and needs to verify all of the IPv6 interface addresses on a router. What is the best command to use to accomplish the task?

show ipv6 interface
show interfaces
show ip nat translations
show ip route

A

show ipv6 interface

101
Q

A teacher is having difficulties connecting his PC to the classroom network. He needs to verify that a default gateway is configured correctly. What is the best command to use to accomplish the task?

ipconfig
copy running-config startup-config
show interfaces
show ip nat translations

A

ipconfig

102
Q

What is a characteristic of UDP?

UDP datagrams take the same path and arrive in the correct order at the destination.​
Applications that use UDP are always considered unreliable.​
UDP reassembles the received datagrams in the order they were received.
UDP only passes data to the network when the destination is ready to receive the data.

A

UDP reassembles the received datagrams in the order they were received.

Networking Revamped (15 decks)

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