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NEC > MOD 1-6 > Flashcards

MOD 1-6 Flashcards

1
Q

are computers with software that allow them to provide information, like email or web pages, to other end devices on the network.

A

Servers

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2
Q

In small businesses and homes, many computers function as the servers and clients on the network. This type of network is called

A

peer-to-peer network.

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3
Q

is either the source or destination of a message transmitted over the network.

A

end device

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4
Q

connect the individual end devices to the network. They can connect multiple individual networks to form an internetwork. These intermediary devices provide connectivity and ensure that data flows across the network.

A

Intermediary devices

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5
Q

use the destination end device address, in conjunction with information about the network interconnections, to determine the path that messages should take through the network.

A

Intermediary devices

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6
Q

Which of the following is the name for all computers connected to a network that participate directly in network communication?

A

Hosts

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7
Q

When data is encoded as pulses of light, which media is being used to transmit the data?

A

Fiber-optic Cable

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8
Q

Which two devices are intermediary devices?

A

routers & switches

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9
Q

Which connection physically connects the end device to the network?

A

NIC

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10
Q

Which connections are specialized ports on a networking device that connect to individual networks?

A

Interface

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11
Q

Which type of network topology lets you see which end devices are connected to which intermediary devices and what media is being used?

A

Logical Topology

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12
Q

Which type of network topology lets you see the actual location of intermediary devices and cable installation?

A

Physical Topology

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13
Q

Which network infrastructure provides access to users and end devices in a small geographical area, which is typically a network in a department in an enterprise, a home, or small business?

A

LAN

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14
Q

Which network infrastructure might an organization use to provide secure and safe access to individuals who work for a different organization but require access to the organization’s data?

A

Extranet

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15
Q

Which network infrastructure provides access to other networks over a large geographical area, which is often owned and managed by a telecommunications service provider?

A

WAN

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16
Q

When designers follow accepted standards and protocols, which of the four basic characteristics of network architecture is achieved?

A

Scalability

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17
Q

Confidentiality, integrity, and availability are requirements of which of the four basic characteristics of network architecture?

A

Security

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18
Q

With which type of policy, a router can manage the flow of data and voice traffic, giving priority to voice communications if the network experiences congestion?

A

QoS

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19
Q

Having multiple paths to a destination is known as redundancy. This is an example of which characteristic of network architecture?

A

Fault Tolerance

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20
Q

Which feature is a good conferencing tool to use with others who are located elsewhere in your city, or even in another country?

A

Video Communications

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21
Q

Which feature describes using personal tools to access information and communicate across a business or campus network?

A

BYOD

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22
Q

Which feature contains options such as Public, Private, Custom and Hybrid?

A

Cloud Computing

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23
Q

Which feature is being used when connecting a device to the network using an electrical outlet?

A

Powerline

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24
Q

Which feature uses the same cellular technology as a smartphone?

A

Wireless Broadband

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25
Q

Which attack slows down or crashes equipment and programs?

A

Denial of Service (Dos)

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26
Q

Which option creates a secure connection for remote workers?

A

Virtual Private Network (VPN)

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27
Q

Which option blocks unauthorized access to your network?

A

Firewall

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28
Q

Which option describes malicious code running on user devices?

A

Virus, Worm, or Trojan Horse

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29
Q

During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. Which type of threat is affecting this computer?

A

Spyware

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30
Q

Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?

A

Extranet

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31
Q

A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?

A

Bring Your Own Device

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32
Q

What is an ISP?

A

It is an organization that enables individuals and business to connect to the internet

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33
Q

In which scenario would the use of a WISP be recommended?

A

A farm in rural area without wired broadband access

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34
Q

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?

A

Scalability

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35
Q

A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber optic cable that connects two of the existing dormitories to the campus data center. Although the cable has been cut, students in the dormitories only experience a very short interruption of network services. What characteristic of the network is shown here?

A

Fault Tolerance

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36
Q

What are two characteristics of a scalable network?.

A

1.grows in size without impacting existing users

2.suitable for modular devices that allow for expansion

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37
Q

Which device performs the function of determining the path that messages should take through internetworks?

A

A router

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38
Q

Which two Internet connection options do not require that physical cables be run to the building? .

A

satellite & cellular

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39
Q

What type of network must a home user access in order to do online shopping?

A

The Internet

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40
Q

How does BYOD change the way in which businesses implement networks?​

A

BYOD provides flexibility in where and how users can access network resources

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41
Q

An employee wants to access the network of the organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network?

A

VPN

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42
Q

It provides connections through interconnected global networks.

A

Internet

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43
Q

What are two functions of end devices on a network?

A
  1. They originate the data that flows through the network
  2. They are the interface between humans and the communication network.
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44
Q

Which access method would be most appropriate if you were in the equipment room with a new switch that needs to be configured?

A

Console

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45
Q

Which access method would be most appropriate if your manager gave you a special cable and told you to use it to configure the switch?

A

Console

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46
Q

Which access method would be the most appropriate in-band access to the IOS over a network connection?

A

Telnet/SSh

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47
Q

Which access method would be the most appropriate if you call your manager to tell him you cannot access your router in another city over the internet and he provides you with the information to access the router through a telephone connection?

A

Aux

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48
Q

Which IOS mode allows access to all commands and features?

A

privileged EXEC mode

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49
Q

Which IOS mode are you in if the Switch(config)# prompt is displayed?

A

global configuration mode

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50
Q

Which IOS mode are you in if the Switch> prompt is displayed?

A

use EXEC mode

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51
Q

Which two commands would return you to the privileged EXEC prompt regardless of the configuration mode you are in?

A
  1. CTRL + Z
  2. End
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52
Q

What is the command to assign the name “Sw-Floor-2” to a switch?

A

hostname SW-Floor-2

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53
Q

How is the privileged EXEC mode access secured on a switch?

A

enable secret class

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54
Q

Which command enables password authentication for user EXEC mode access on a switch?

A

login

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55
Q

Which command encrypts all plaintext passwords access on a switch?

A

Service password - encryption

56
Q

Which is the command to configure a banner to be displayed when connecting to a switch?

A

banner motd $ Keep out $

57
Q

What is the structure of an IPv4 address called?

A

dotted-decimal format

58
Q

How is an IPv4 address represented?

A

four decimal numbers between 0 and 255 separated by periods

59
Q

What type of interface has no physical port associated with it?

A

switch virtual interface

60
Q

Which statement is true about the running configuration file in a Cisco IOS device?

A

it affects the operation of the device immediately when modified.

61
Q

Which type of access is secured on a Cisco router or switch with the enable secret command?

A

privileged EXEC

62
Q

What is the default SVI on a Cisco switch?

A

VLAN1

63
Q

A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?

A

user Exec mode

64
Q

A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?

A

user Exec mode

65
Q

Which memory location on a Cisco router or switch will lose all content when the device is restarted?

A

RAM

66
Q

Why would a technician enter the command copy startup-config running-config?

A

to copy an existing configuration into RAM

67
Q

Which functionality is provided by DHCP?

A

automatic assignment of an IP address to each host

68
Q

Which memory location on a Cisco router or switch stores the startup configuration file?

A

NVRAM

69
Q

To what subnet does the IP address 10.1.100.50 belong if a subnet mask of 255.255.0.0 is used?

A

10.1.0.0

70
Q

What is the process of converting information into the proper form for transmission?

A

Encoding

71
Q

Which step of the communication process is concerned with properly identifying the address of the sender and receiver?

A

Formatting

72
Q

Which delivery method is used to transmit information to one or more end devices, but not all devices on the network?

A

Multicast

73
Q

BGP and OSPF are examples of which type of protocol?

A

Routing

74
Q

This protocol is responsible for guaranteeing the reliable delivery of information.

A

TCP

75
Q

UDP and TCP belong to which layer of the TCP/IP protocol?

A

Transport

76
Q

Which protocol operates at the network access layer of the TCP/IP model?

A

Ethernet

77
Q

A device receives a data link frame with data and processes and removes the Ethernet information. What information would be the next to be processed by the receiving device?

A

IP at the internet layer

78
Q

True or false. Standards organizations are usually vendor-neutral.

A

True

79
Q

This standards organization is concerned with the Request for Comments (RFC) documents that specify new protocols and update existing ones.

A

Internet Engineering Task Force

80
Q

This standards organization is responsible for IP address allocation and domain name management.

A

Internet Assigned Numbers Authority

81
Q

What types of standards are developed by the Electronics Industries Alliance (EIA)?

A

Electric Wiring and Connectors

82
Q

What is the process of dividing a large data stream into smaller pieces prior to transmission?

A

Segmentation

83
Q

What is the PDU associated with the transport layer?

A

Segment

84
Q

Which protocol stack layer encapsulates data into frames?

A

Data Link

85
Q

What is the name of the process of adding protocol information to data as it moves down the protocol stack?

A

Encapsulation

86
Q

True or false? Frames exchanged between devices in different IP networks must be forwarded to a default gateway.

A

True

87
Q

True or false? The right-most part of an IP address is used to identify the network that a device belongs to.

A

False

88
Q

What is used to determine the network portion of an IPv4 address?

A

Subnet Mask

89
Q

What is the order of the two addresses in the data link frame?

A

Destination MAC, source MAC

90
Q

True or False? Data Link addresses are physical so they never change in the data link frame from source to destination.

A

True

91
Q

What type of communication will send a message to all devices on a local area network?

A

Broadcast

92
Q

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

A

To convert information to the appropriate form for transmission

93
Q

Which message delivery option is used when all devices need to receive the same message simultaneously?

A

Broadcast

94
Q

What is the purpose of protocols in data communications?

A

Providing the rules required for a specific type of communication to occur

95
Q

Which logical address is used for delivery of data to a remote network?

A

Destination IP address

96
Q

What is the general term that is used to describe a piece of data at any layer of a networking model?

A

Protocol Date Unit

97
Q

Which layer of the OSI model defines services to segment and reassemble data for individual communications between end devices?

A

Transport

98
Q

Which type of communication will send a message to a group of host destinations simultaneously?

A

Multicast

99
Q

What process is used to receive transmitted data and convert it into a readable message?

A

Decoding

100
Q

What is done to an IP packet before it is transmitted over the physical medium?

A

It is encapsulated in a Layer 2 frame

101
Q

What process is used to place one message inside another message for transfer from the source to the destination?

A

Encapsulation

102
Q

A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?

A

HTTP, TCP, IP, Ethernet

103
Q

True or false? The physical layer is only concerned with wired network connections.

A

False

104
Q

True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.

A

False

105
Q

The physical layer of the receiving device passes bits up to which higher level layer?

A

Data Link

106
Q

What PDU is received by the physical layer for encoding and transmission?

A

Frame

107
Q

Which media uses patterns of microwaves to represent bits?

A

Wireless

108
Q

Which media uses patterns of light to represent bits?

A

Fiber-Optic

109
Q

Which media uses electrical pulses to represent bits?

A

Copper

110
Q

Which of these is the name for the capacity of a medium to carry data?

A

Bandwidth

111
Q

Which of these is a measure of the transfer of bits across the media?

A

Throughput

112
Q

Which of the following attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission.

A

Coaxial

113
Q

Which of the following counters EMI and RFI by using shielding techniques and special connectors?

A

STP

114
Q

Which of the following is the most common network media?

A

UTP

115
Q

Which of the following terminates with BNC, N type and F type connectors?

A

Coaxial

116
Q

Which of the following fiber-optic cable types can help data travel approximately 500 meters?

A

Multimode

117
Q

Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

A

mulimode

118
Q

Which of the following fiber-optic cable types use lasers in a single stream as a data light source transmitter?

A

Single-mode

119
Q

Which of the following fiber-optic cable types is used to connect long-distance telephony and cable TV applications?

A

single-mode

120
Q

Which of the following fiber-optic cable types can travel approximately 100 km?

A

single-mode

121
Q

Which of the following fiber-optic cable types is used within a campus network?

A

multimode

122
Q

True or false. Wireless is not well suited for enterprise networks.

A

False

123
Q

True or false. Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance.

A

False

124
Q

Which of the following wireless standards is best suited for industrial and IoT environments?

A

Zigbee

125
Q

Which of the following wireless standards is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters?

A

Bluethooth

126
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

127
Q

What type of cable is used to connect a workstation serial port to a Cisco router console port?

A

Rollover

128
Q

Why are two strands of fiber used for a single fiber optic connection?

A

They allow for full-duplex connectivity

129
Q

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

A

Twisting opposing circuit wire pairs together

130
Q

What is one advantage of using fiber optic cabling rather than copper cabling?

A

It is able to carry signals much father than copper cabling

131
Q

A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?

A

The end-user needs mobility when connetin to the network

132
Q

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

A

Straight - through

133
Q

What is a characteristic of UTP cabling?

A

Cancellation

134
Q

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal distortion?

A

The mircowave oven

135
Q

What is the purpose of the OSI physical layer?

A

Transmitting bits across the local media

136
Q

Which characteristic describes crosstalk?

A

The distortion of the transmitted messages from signals carried in adjacent wires

137
Q

Which standards organization oversees development of wireless LAN standards?

A

IEEE

NEC (1 decks)

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