Final Exam Flashcards
1
Q
A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?
A
show interfaces
2
Q
Where are Cisco IOS debug output messages sent by default?
A
console line
3
Q
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
A
terminal monitor
4
Q
What source IP address does a router use by default when the traceroute command is issued?
A
the IP address of the outbound interface
5
Q
A user is unable to reach the web site when typing http://www.cisco.com in a web browser, but can reach the same site by typing http://72.163.4.161. What is the issue?
A
DNS
6
Q
What is a characteristic of a fault tolerant network?
A
a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure
7
Q
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?
A
audio conference, financial transactions, web page
8
Q
What is a benefit of using cloud computing in networking?
A
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software
9
Q
What is the function of the shell in an OS?
A
It interfaces between the users and the kernel.
10
Q
Which connection provides a secure CLI session with encryption to a Cisco switch?
A
an SSH connection
11
Q
A network technician is attempting to configure an interface by entering the following command:
SanJose(config)# ip address 192.168.2.1 255.255.255.0.
The command is rejected by the device. What is the reason for this?
A
The command is being entered from the wrong mode of operation
12
Q
An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?
A
to interrupt the ping process
13
Q
On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
A
VLAN 1
14
Q
What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
A
TCP
15
Q
What is an advantage to using a protocol that is defined by an open standard?
A
It encourages competition and promotes choices.
16
Q
What are two benefits of using a layered network model?
A
- It assists in protocol design.
- It prevents technology in one layer from affecting other layers.
17
Q
Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)
A
Transport
Network
18
Q
Which name is assigned to the transport layer PDU?
A
Segment
19
Q
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
A
physical layer
20
Q
What is a characteristic of UTP cabling?
A
cancellation
21
Q
What are two characteristics of fiber-optic cable?
A
It is not affected by EMI or RFI.
It is more expensive than UTP cabling is.
22
Q
What is a characteristic of the LLC sublayer?
A
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media
23
Q
A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?
A
partial mesh
24
Q
What method is used to manage contention-based access on a wireless network?
A
CSMA/CA
25
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.
26
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
store-and-forward switching
27
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?
BB:BB:BB:BB:BB:BB
28
What addresses are mapped by ARP?
destination MAC address to a destination IPv4 address
29
What are two services provided by the OSI network layer? (Choose two.)
routing packets toward the destination
encapsulating PDUs from the transport layer
30
What are two functions of NVRAM? (Choose two.)
to retain contents when power is removed
to store the startup configuration file
31
Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?
The administrator will be presented with the R1\> prompt.
32
What are three characteristics of multicast transmission?
* A single packet can be sent to a group of hosts.
* Multicast transmission can be used by routers to exchange routing information.
* Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255
33
What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?
203.0.113.211
34
What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)
10. 0.0.0/8
172. 16.0.0/12
192. 168.0.0/16
35
What purpose does NAT64 serve in IPv6?
It converts IPv6 packets into IPv4 packets
36
What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?
1. 2001:0:abcd::1
2. 2001:0:0:abcd::1
3. 2001::abcd::1
4. 2001:0000:abcd::1
5. 2001::abcd:0:1
2001:0:0:abcd::1
37
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
1. FEC0::/10
2. FDEE::/7
3. FE80::/10
4. FF00::/8
FE80::/10
38
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
1. 254
2. 190
3. 192
4. 62
5. 64
1. 62
39
A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?
1. 255.255.255.0
2. 255.255.255.128
3. 255.255.255.224
4. 255.255.255.240
255.255.255.128
40
Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.
41
Which scenario describes a function provided by the transport layer?
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.
42
A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?
the destination port number
43
What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)
to identify missing segments at the destination
to reassemble the segments at the remote location
44
Which two tasks are functions of the presentation layer? (Choose two.)
compression
encryption
45
What is a key characteristic of the peer-to-peer networking model?
resource sharing without a dedicated server
46
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?
NSLOOKUP
47
Which domain name would be an example of a top-level domain?
.COM
48
A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?
The address is returned to the pool for reuse when the lease expires.
49
A wireless host needs to request an IP address. What protocol would be used to process the request?
DHCP
50
Which example of malicious code would be classified as a Trojan horse?
malware that was written to look like a video game
51
When applied to a router, which command would help mitigate brute-force password attacks against the router?
login block-for 60 attempts 5 within 60
52
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
WAN
53
A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
DSL
54
How does quality of service help a network support a wide range of applications and services?
by providing mechanisms to manage congested network traffic
55
On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
VLAN 1
56
After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?
The new configuration will be loaded if the switch is restarted.
57
Which connection provides a secure CLI session with encryption to a Cisco switch?
a console connection
an AUX connection
a Telnet connection
an SSH connection
58
What function does pressing the Tab key have when entering a command in IOS?
It completes the remainder of a partially typed word in a command.
59
What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
tcp
60
What layer is responsible for routing messages through an internetwork in the TCP/IP model?
internet
61
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Segments are sent from the transport layer to the internet layer.
62
What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?
MAC address
63
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
physical layer
64
Which procedure is used to reduce the effect of crosstalk in copper cables?
twisting opposing circuit wire pairs together
65
What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
66
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
* An IP address is added.
* The logical address is added.
* The physical address is added.
* The process port number is added.
* The physical address is added.
67
What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
* error correction through a collision detection method
* session control using port numbers
* data link layer addressing
* placement and removal of frames from the media
* detection of errors through CRC calculations
* delimiting groups of bits into frames
* conversion of bits into data signals
* data link layer addressing
* detection of errors through CRC calculations
* delimiting groups of bits into frames
68
What are two characteristics of Ethernet MAC addresses? (Choose two.)
They are globally unique.
They are expressed as 12 hexadecimal digits.
69
If a device receives an Ethernet frame of 60 bytes, what will it do?
drop the frame
70
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)
The frame has the broadcast address as the destination address.
The destination address is unknown to the switch.
71
Which switching method has the lowest level of latency?
fast-forward
72
Which two commands can be used on a Windows host to display the routing table?
route print
netstat -r
73
Which two functions are primary functions of a router? (Choose two.)
packet forwarding
path selection
74
What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)
10. 0.0.0/8
172. 16.0.0/12
192. 168.0.0/16
75
What is the binary representation of 0xCA?
11001010
76
At a minimum, which address is required on IPv6-enabled interfaces?
link-local
77
Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?
SLAAC
78
How many usable IP addresses are available on the 192.168.1.0/27 network?
30
79
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
80
A network administrator wants to have the same subnet mask for three subnetworks at a small site. The site has the following networks and numbers of devices:
Subnetwork A: IP phones – 10 addresses
Subnetwork B: PCs – 8 addresses
Subnetwork C: Printers – 2 addresses
What single subnet mask would be appropriate to use for the three subnetworks?
255.255.255.240
81
Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.
82
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
83
What are two characteristics shared by TCP and UDP? (Choose two.)
port numbering
use of checksum
84
Why are port numbers included in the TCP header of a segment?
to enable a receiving host to forward the data to the appropriate application
85
Which two protocols operate at the highest layer of the TCP/IP protocol stack?
DNS
POP
86
What is one difference between the client-server and peer-to-peer network models?
Every device in a peer-to-peer network can function as a client or a server.
87
Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?
client/server
88
What network service resolves the URL entered on a PC to the IP address of the destination server?
DNS
89
A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?
an increase in host-to-host ping response times
90
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
91
```
# Fill in the blank.
During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a _____________ message.
```
Multicast
92
A medium-sized business is researching available options for connecting to the Internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?
leased line
93
What is the purpose of having a converged network?
to reduce the cost of deploying and maintaining the communication infrastructure
94
What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
scalability
95
Refer to the exhibit. From global configuration mode, an administrator is attempting to create a message-of-the-day banner by using the command banner motd V Authorized access only! Violators will be prosecuted! V When users log in using Telnet, the banner does not appear correctly. What is the problem?
The delimiting character appears in the banner message.
96
What are three characteristics of an SVI? (Choose three.)
It is not associated with any physical interface on a switch.
It provides a means to remotely manage a switch.
It is associated with VLAN1 by default.
97
A technician configures a switch with these commands: SwitchA(config)# interface vlan 1
SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0
SwitchA(config-if)# no shutdown
What is the technician configuring?
SVI
98
In computer communication, what is the purpose of message encoding?
to convert information to the appropriate form for transmission
99
What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
TCP
100
What is the process of dividing a data stream into smaller pieces before transmission?
segmentation
101
When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?
subnet mask
102
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
physical layer
103
A network engineer is measuring the transfer of bits across the company backbone for a mission critical database application. The engineer notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
* the amount of traffic that is currently crossing the network
* the type of traffic that is crossing the network
* the latency that is created by the number of network devices that the data is crossing
104
Which type of UTP cable is used to connect a PC to a switch port?
* console
* rollover
* crossover
* straight-through
straight-through
105
What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
106
What are two actions performed by a Cisco switch? (Choose two.)
* using the source MAC addresses to build a MAC address table
* utilizing the MAC address table to forward frames
107
What are two examples of the cut-through switching method? (Choose two.)
fast-forward switching
fragment-free switching
108
What information is added during encapsulation at OSI Layer 3?
source and destination IP address
109
Refer to the exhibit. The network administrator for a small advertising company has chosen to use the 192.168.5.96/27 network for internal LAN addressing. As shown in the exhibit, a static IP address is assigned to the company web server. However, the web server cannot access the Internet. The administrator verifies that local workstations with IP addresses that are assigned by a DHCP server can access the Internet, and the web server is able to ping local workstations. Which component is incorrectly configured?
default gateway address
110
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the network address of the destination network
111
Which three addresses are valid public addresses? (Choose three.)
* 198.133.219.17
* 192.168.1.245
* 10.15.250.5
* 128.107.12.117
* 192.15.301.240
* 64.104.78.227
198. 133.219.17
128. 107.12.117
64. 104.78.227
112
What type of IPv6 address is FE80::1?
link-local
113
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)
* There is connectivity between this device and the device at 192.168.100.1.
* There are 4 hops between this device and the device at 192.168.100.1.
114
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
115
How many hosts are addressable on a network that has a mask of 255.255.255.248?
6
116
Refer to the exhibit. Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices?
* 192.168.10.0
* 192.168.10.128
* 192.168.10.192
* 192.168.10.224
* 192.168.10.240
**192.168.10.128**
117
In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)
* when a faster delivery mechanism is needed
* when applications do not need to guarantee delivery of the data
118
What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
destination and source port numbers
119
What is the TCP mechanism used in congestion avoidance?
* three-way handshake
* socket pair
* two-way handshake
* sliding window
sliding window
120
Which three statements characterize UDP?
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.
121
Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)
DNS
POP
122
Which two roles can a computer assume in a peer-to-peer network where a file is being shared between two computers? (Choose two.)
client
server
123
What is the function of the HTTP GET message?
to request an HTML page from a web server
124
When planning for network growth, where in the network should packet captures take place to assess network traffic?
on as many different network segments as possible
