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Flashcards in All Mixed Deck (135):
1

1.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?

show interfaces

2

2.Where are Cisco IOS debug output messages sent by default?

console line

3

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






terminal monitor

4

4.What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?

The computer receives an IP address that starts with 169.254

5

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

the IP address of the outbound interface

6

6.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?

DNS

7

1.What is a characteristic of a fault tolerant network?

a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure

8

2.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

9

3.What is a benefit of using cloud computing in networking?

Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.

10

4.What is the function of the shell in an OS?

It interfaces between the users and the kernel

11

5.Which connection provides a secure CLI session with encryption to a Cisco switch?

an SSH connection

12

6.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?

The command is being entered from the wrong mode of operation

13

7.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?

to interrupt the ping process

14

8.Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?

lineconin

15

9.On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

VLAN 1

16

10.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

17

11.What is an advantage to using a protocol that is defined by an open standard?

It encourages competition and promotes choices

18

What are two benefits of using a layered network model?

It assists in protocol design
It prevents technology in one layer from affecting other layers.

19

Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)

Network
Transport

20

Which name is assigned to the transport layer PDU?

Segment

21

15.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

22

16.A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator 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

23

What is a characteristic of UTP cabling?

cancellation

24

What are two characteristics of fiber-optic cable? (Choose two.)

It is not affected by EMI or RFI.

It is more expensive than UTP cabling is

25

19.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.

26

20.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?

Partial Mesh

27

What method is used to manage contention-based access on a wireless network?

CSMA/CA

28

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

data link layer addressing

detection of errors through CRC calculations

delimiting groups of bits into frames

29

23.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 wil discard the frame

30

24.Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?

store-and-forward switching

31

26.What addresses are mapped by ARP?

destination MAC address to a destination IPv4 address

32

27.What are two services provided by the OSI network layer? (Choose two.)

routing packets toward the destination
•encapsulating PDUs from the transport layer

33

28.What are two functions of NVRAM? (Choose two.)

to retain contents when power is removed
•to store the startup configuration file

34

31.What are three characteristics of multicast transmission? (Choose three.)

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.

35

32.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

36

33.What purpose does NAT64 serve in IPv6?

It converts IPv6 packets into IPv4 packets

37

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

FE80::/10

38

36.How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

62

39

37.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?

255.255.255.128

40

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

192.168.1.64/26

41

39.Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements.

42

40.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

43

41.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

44

42.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

45

43.Which two tasks are functions of the presentation layer? (Choose two.)

compression
encryption

46

44.What is a key characteristic of the peer-to-peer networking model?

resource sharing without a dedicated server

47

45.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

48

46.Which domain name would be an example of a top-level domain?

.com

49

47.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.

50

48.A wireless host needs to request an IP address. What protocol would be used to process the request?

DHCP

51

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

malware that was written to look like a video game

52

50.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

53

53.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

54

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

55

How does quality of service help a network support a wide range of applications and services?

by providing mechanisms to manage congested network traffic

56

56.On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

VLAN 1

57

57.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.

58

59.Which connection provides a secure CLI session with encryption to a Cisco switch?

an SSH connection

59

60.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?

an SSH connection

60

61.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?

The command is being entered from the wrong mode of operation

61

62.What function does pressing the Tab key have when entering a command in IOS?

TCP

62

64.What layer is responsible for routing messages through an internetwork in the TCP/IP model?

internet

63

65.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.

64

66.What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?

MAC Address

65

67.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

66

68.A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator 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

67

69.Which procedure is used to reduce the effect of crosstalk in copper cables?

twisting opposing circuit wire pairs together

68

70.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.

69

71.What method is used to manage contention-based access on a wireless network?

CSMA/CA

70

72.During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

The physical address is added

71

72.During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

The physical address is added

72

73.What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

data link layer addressing
detection of errors through CRC calculations
•delimiting groups of bits into frames

73

74.What are two characteristics of Ethernet MAC addresses?

They are globally unique.

They are expressed as 12 hexadecimal digits.

74

75.If a device receives an Ethernet frame of 60 bytes, what will it do?

drop the frame

75

76.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.

76

77.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.

77

78.Which switching method has the lowest level of latency?

fast-forward

78

79.Which two commands can be used on a Windows host to display the routing table? (Choose two.)

route print
netstat -r

79

80.Which two functions are primary functions of a router? (Choose two.)

packet forwarding
path selection

80

80.Which two functions are primary functions of a router? (Choose two.)

packet forwarding
path selection

81

81.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

82

82.What purpose does NAT64 serve in IPv6?

It converts IPv6 packets into IPv4 packets

83

83.What is the binary representation of 0xCA?

11001010

84

85.Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?

SLAAC

85

86.What is the purpose of the command ping ::1?

It tests the internal configuration of an IPv6 host.

86

87.How many usable IP addresses are available on the 192.168.1.0/27 network?

30

87

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

192.168.1.64/26

88

89.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

255.255.255.240

89

90.Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements.

90

91.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

91

92.What are two characteristics shared by TCP and UDP? (Choose two.)

port numbering

use of checksum

92

93.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

93

94.Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)

DNS

POP

94

95.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

95

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

client/server

96

97.What network service resolves the URL entered on a PC to the IP address of the destination server?

DNS

97

98.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

98

99.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

99

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

100

103.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

101

104.What is the purpose of having a converged network?

to reduce the cost of deploying and maintaining the communication infrastructure

102

105.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

103

106.Which connection provides a secure CLI session with encryption to a Cisco switch?

an SSH connection

104

107.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?

The command is being entered from the wrong mode of operation.

105

108.After several configuration changes are made to a router, the copy running-configuration startup-configuration command is issued. Where will the changes be stored?

NVRAM

106

109.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.

107

110.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.

108

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 shutdownWhat is the technician configuring?

SVI

109

112.In computer communication, what is the purpose of message encoding?

to convert information to the appropriate form for transmission

110

113.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

111

114.What is the process of dividing a data stream into smaller pieces before transmission?

segmentation

112

115.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

113

116.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

114

117.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

115

118.Which type of UTP cable is used to connect a PC to a switch port?

straight-through

116

119.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.

117

120.What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)

data link layer addressing
detection of errors through CRC calculations
•delimiting groups of bits into frames

118

121.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

119

122.What are two actions performed by a Cisco switch? (Choose two.)

using the source MAC addresses of frames to build and maintain a MAC address table

utilizing the MAC address table to forward frames via the destination MAC address

120

123.What are two examples of the cut-through switching method? (Choose two.)

fast-forward switching

fragment-free switching

121

124.What information is added during encapsulation at OSI Layer 3?

source and destination IP address

122

126.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

123

127.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

124

129.What type of IPv6 address is FE80::1?

link-local

125

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

192.168.1.64/26

126

132.How many hosts are addressable on a network that has a mask of 255.255.255.248?

6

127

133.Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements.

128

135.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

129

136.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

130

137.What is the TCP mechanism used in congestion avoidance?

sliding window

131

138.Which three statements characterize UDP? (Choose three.)

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.

132

139.Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)

DNS

POP

133

140.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

134

141.What is the function of the HTTP GET message?

to request an HTML page from a web server

135

142.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