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Final Flashcards

1
Q
  1. Which range of link-local addresses can be assigned to an IPv6-enabled interface?
A

FE80::/10

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2
Q
  1. 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?
A

1E6F:65FF:FEC2:BDF8

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3
Q
  1. 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?
A
  • 256
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4
Q

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?

A

store-and-forward

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5
Q

What is one main characteristic of the data link layer?

A

It shields the upper layer protocol from being aware of the physical medium to be used in the communication.

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6
Q

How does the service password-encryption command enhance password security on Cisco routers and switches?

A

It encrypts passwords that are stored in router or switch configuration files.

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7
Q

Why would a Layer 2 switch need an IP address?

A

to enable the switch to be managed remotely

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8
Q

What characteristic describes identity theft?

A

the use of stolen credentials to access private data

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9
Q

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?

A

the MAC address of the default gateway

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10
Q

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?

A

255.255.255.128

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11
Q

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?

A

tracert

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12
Q

What technique is used with UTP cable to help protect against signal interference from crosstalk?

A

twisting the wires together into pairs

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13
Q

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?

A

worm

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14
Q

Which scenario describes a function provided by the transport layer?

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.

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15
Q

What does the term “attenuation” mean in data communication?

A

loss of signal strength as distance increases

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16
Q

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?

A

authorization

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17
Q

Which subnet would include the address 192.168.1.96 as a usable host address?

A

192.168.1.64/26

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18
Q

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?

A

remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0

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19
Q

What will happen if the default gateway address is incorrectly configured on a host?

A

The host cannot communicate with hosts in other networks.

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20
Q

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?

A

255.255.255.128

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21
Q

A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?

A

HTTP

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22
Q

What is an advantage for small organizations of adopting IMAP instead of POP?

A

Messages are kept in the mail servers until they are manually deleted from the email client.

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23
Q

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?

A

nslookup

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24
Q

The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?

A

The switch can be remotely managed from a host on another network.

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25
What happens when the transport input ssh command is entered on the switch vty lines?
Communication between the switch and remote users is encrypted.
26
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?
reconnaissance
27
What service is provided by HTTP?
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
27
A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
28
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?
switch the packet to the directly connected interface
29
What characteristic describes antispyware?
applications that protect end devices from becoming infected with malicious software
30
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?
SSH
31
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?
frame check sequence field
32
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
33
What service is provided by POP3?
Retrieves email from the server by downloading the email to the local mail application of the client.
33
What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
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.
34
A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
TFTP
35
An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet?
all IPv6 configured routers on the local link
36
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 an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
37
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?
Exit privileged EXEC mode and press Enter .
38
What method is used to manage contention-based access on a wireless network?
CSMA/CA
39
What is a function of the data link layer?
provides for the exchange of frames over a common local media
40
What is the purpose of the TCP sliding window?
to request that a source decrease the rate at which it transmits data
41
Which switching method drops frames that fail the FCS check?
store-and-forward switching
41
What characteristic describes spyware?
software that is installed on a user device and collects information about the user
42
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?
Security rules are applied to the default gateway device, preventing it from processing ping requests.
43
What service is provided by FTP?
Allows for data transfers between a client and a file server.
44
What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?
255.255.255.192
45
What service is provided by BOOTP?
Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.
46
What characteristic describes adware?
software that is installed on a user device and collects information about the user
47
What is a benefit of using cloud computing in networking?
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
48
Which information does the show startup-config command display?
the contents of the saved configuration file in the NVRAM
49
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48:FC5:A4::/64
50
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?
the network performance baseline
51
What is an advantage to using a protocol that is defined by an open standard?
It encourages competition and promotes choices.
52
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?
255.255.255.0
53
A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
IMAP
54
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
Time-to-Live
55
A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?
FTP
56
What attribute of a NIC would place it at the data link layer of the OSI model?
MAC address
57
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?
255.255.255.240
58
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 value in the TTL field reaches zero
59
Which wireless technology has low-power and data rate requirements making it popular in home automation applications?
ZigBee
60
Which layer of the TCP/IP model provides a route to forward messages through an internetwork?
internet
61
Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?
DNS
62
What service is provided by DNS?
Resolves domain names, such as cisco.com, into IP addresses.
63
A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
POP3
64
What command can be used on a Windows PC to see the IP configuration of that computer?
ipconfig
64
What characteristic describes a virus?
malicious software or code running on an end device
64
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?
audio conference, financial transactions, web page
65
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?
peer-to-peer (P2P)
66
What service is provided by Internet Messenger?
An application that allows real-time chatting among remote users.
67
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 an ARP request for the MAC address of the default gateway.
68
A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
69
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?
255.255.255.224
70
What characteristic describes a Trojan horse?
malicious software or code running on an end device
71
What service is provided by HTTPS?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
72
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?
255.255.255.192
73
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 source port number that is used by each application.*
74
What characteristic describes a DoS attack?
an attack that slows or crashes a device or network service
75
What service is provided by SMTP?
Allows clients to send email to a mail server and the servers to send email to other servers.
76
A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
SSH
77
What characteristic describes an IPS?
software that identifies fast-spreading threats
78
What service is provided by DHCP?
Dynamically assigns IP addresses to end and intermediary devices.
79
Which wireless technology has low-power and low-data rate requirements making it popular in IoT environments?
Zigbee
80
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 be remotely managed from a host on another network.

test 2 (2 decks)

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