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DB > TDMM Chapter 15 > Flashcards

TDMM Chapter 15 Flashcards

1
Q

CAN

A

Campus Area Network

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2
Q

CR

A

Computer Room

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3
Q

HDA

A

Horizontal Distribution Area

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4
Q

LAN

A

Local Area Network

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5
Q

MAN

A

Metropolitan Area Network

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6
Q

MDA

A

Main Distribution Area

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7
Q

Network Architecture

A

The structured grouping of hardware, software and applications

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8
Q

NIC

A

Network Interface Card

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9
Q

NOS

A

Network Operating System

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10
Q

OS

A

Operating System

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11
Q

PAN

A

Personal Area Network

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12
Q

SAN

A

Storage Area Network

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13
Q

VoIP

A

Voice over Internet Protocol

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14
Q

WAN

A

Wide Area Network

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15
Q

Why are data networks implemented?

A

To enable the sharing of resources and the exchange of information between users and devices

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16
Q

Name the five types of networks in terms of geographical area

A
  • Personal
  • Local
  • Campus
  • Metropolitan
  • Wide Area
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17
Q

What is the smallest type of network in terms of geographical area?

A

Personal

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18
Q

What is the largest type of network in terms of geographical area?

A

Wide Area

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19
Q

How much area does a PAN cover?

A

An area generally associated with an individual workspace

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20
Q

How much area does a LAN cover?

A

An area generally associated with some of all of the space within a building

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21
Q

How is a CAN created?

A

By linking the LANs located in two or more building that are in close proximity

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22
Q

How is a MAN created?

A

By linking the networks located at two or more sites within a city

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23
Q

How is a WAN created?

A

By linking the networks located at two or more sites, distributed over geographic distances that extend beyond the span of a single metropolitan network

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24
Q

What is the OSI reference model?

A

A framework for classifying all of the processes associated with message exchange on a network

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25
Q

What is the objective of the OSI model?

A

To provide structured approach for the development of all types of networks

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26
Q

True or False
The OSI model can be used to describe any type of network

A

True

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27
Q

Describe the layering in terms of the OSI model

A

An approach that divides various functions and services provided by a network into discrete groupings

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28
Q

How many layers are used in the OSI model?

A

Seven

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29
Q

Which layer of the OSI model makes it possible for applications running on dissimilar systems to use a network to exchange information?

A

Layer 7

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30
Q

Which layer of the OSI model is responsible for data conversion?

A

Layer 6

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31
Q

Which layer of the OSI model synchronizes and manages data transfer between network devices?

A

Layer 5

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32
Q

Which layer of the OSI model makes it possible to assign various levels of quality to the data transfer process?

A

Layer 4

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33
Q

Which layer of the OSI model is responsible for internetwork data transfer?

A

Layer 3

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34
Q

Which layer of the OSI model is responsible for intranetwork data transfer?

A

Layer 2

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35
Q

Which layer of the OSI model is responsible for the transfer of information over various media?

A

Layer 1

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36
Q

What type of services are provided by Layer 7 of the OSI model?

A

Application

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37
Q

What type of services are provided by Layer 6 of the OSI model?

A

Presentation

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38
Q

What type of services are provided by Layer 5 of the OSI model?

A

Session

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39
Q

What type of services are provided by Layer 4 of the OSI model?

A

Transport

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40
Q

What type of services are provided by Layer 3 of the OSI model?

A

Network

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41
Q

What type of services are provided by Layer 2 of the OSI model?

A

Data Link

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42
Q

What type of services are provided by Layer 1 of the OSI model?

A

Physical

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43
Q

How are the layers in the OSI model connected?

A

In vertical form, also called a stack protocol stack

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44
Q

What are the connection points between layers in a protocol stack?

A

Service APs

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45
Q

What happens in the OSI layers when a message transfer starts between two systems?

A

A peer to peer relationship is established between the corresponding layers in the protocol stack of each system

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46
Q

Name four common types of network hardware

A
  • Stations
  • Servers
  • Switches
  • Routers
47
Q

What device is used to access an organizational network?

A

Station

48
Q

What type of station connects the network over cabling or a short range wireless connection?

A

Local Station

49
Q

What type of station connects the network over a wired or wireless telcom circuit managed by an SP?

A

Remote Station

50
Q

What is the most common type of local station?

A

Desktop Computer

51
Q

When would a station be configured without internal storage devices and with the external storage disabled?

A

When data security is critical

52
Q

Waht device manages one or more resources shared by users and administrators on a network?

A

Server

53
Q

Name two advantages of server virtualization

A
  • Space savings
  • Ease of configuration by administrators
54
Q

What is server clustering?

A

Linking multiple servers together

55
Q

What is failover access?

A

The process in which activities on a failed server will switch to another server

56
Q

Define high availability in terms of server clustering

A

Improved network reliability enabled by clustering

57
Q

Which network access device provides a centralized point for LAN communications, media connections and management activity?

A

Switch

58
Q

Name the two OSI layers where switches function

A
  • Layer 2
  • Layer 3
59
Q

What is a router?

A

A combination of hardware and software in a specialized device

60
Q

What process allows network administors to direct, modify and refine network traffic flows?

A

Traffic Engineering

61
Q

What term is used to describe the process of running multiple OSs simultaneously in a single server?

A

Server virtualization

62
Q

How does storage virtualization provide flexibility?

A

By allowing many storage units to appear as one

63
Q

Name the four components of a thin client device

A
  • Monitor
  • Keyboard
  • Mouse
  • Network connection
63
Q

How does station virtualization improve security?

A

All data remains in the computer room (CR)

64
Q

Name three types of software that are used to transform a stand alone computer into a network station

A
  • Drivers
  • Utilities
  • Clients
64
Q

What type of software is needed to link a stations NIC to the OS?

A

Driver

65
Q

What is an integrated set of programs designed to control and coordinate all access to network resources?

A

Network Operating System (NOS)

66
Q

What does the directory service of a Network Operating System (NOS) provide to users and admins?

A

A global view of the organizational network

67
Q

What is a flat network?

A

A conventional LAN that uses a single domain to span all of its hubs, switches and devices

68
Q

What devices does a VLAN use to divide a single broadcast domain into multiple smaller ones?

A

Routers

69
Q

Name three advantages of implementing VOIP

A
  • Cost savings
  • Toll free calling
  • Simplified management
70
Q

Define Unified Communications

A

The convergence of VOIP, Video, Messaging and presence indication

71
Q

Why might Unified Communications (UC) allow for fewer copper pairs to be provided in a building?

A

Because it all runs over the data network

72
Q

Why might some traditional analog lines need to remain in a building with Unified Communications?

A

Fax, elevator phone and other utilities

73
Q

What does Real Time describe when applied to video communications?

A

The capture and transfer of video from source with minimal delay

74
Q

Name two criteria for classifying video services

A
  • Number of stations receiving video
  • Direction of transfer of video
75
Q

Name four types of video communications

A
  • PTP unidirectional
  • PTP Bidirectional
  • Point to Multipoint unidirectional
  • Point to Multipoint bidirectional
76
Q

What type of network video communications transfers content in one direction and uses one station to recieve content?

A

point to point directional

77
Q

What type of network video communications transfers content in two directions and uses one station to recieve the content?

A

point to point bidirectional

78
Q

What type of network video communications transfers content in one direction and uses more than one station to recieve the content?

A

point to multipoint unidirectional

79
Q

What type of network video communications transfers content in two directions and uses more than one station to recieve the content?

A

point to multipoint bidirectional

80
Q

What type of network video communications is used to send an image via a webcam?

A

PTP unidirectional

81
Q

What type of network video communications is used for webcasting?

A

Point to multipoint unidirectional

82
Q

What type of network video communications is used for multiplayer gaming?

A

Point to multipoint bidirectional

83
Q

Why is videoconferencing the most demanding network application from a resource perspective?

A

It requires a constant minimum data transfer rate between stations

84
Q

Name the two design processes that are used to produce a comprehensive set of designs for a proposed network

A
  • functional (top down)
  • Physical (bottom up)
85
Q

What does a network designer assess first during the functional design process?

A

Types of users and applications

86
Q

What does a network design assess first during the physical design process?

A

The sites where the network will be deployed

87
Q

Where are computer rooms (CR) traditionally used?

A

Data Centers

88
Q

Name the two primary components of network redundancy

A
  • Telecom infrastructure
  • Hardware Infrastructure
89
Q

What topology class is used for the basic telecom infrastructure?

A

Class 1

90
Q

What is the primary difference between a Class 1 and Class2 telecom infrastructure?

A

In class 2, the ER is served by at least two connections from the same or different AP networks. Class 1 is only one connection

91
Q

Where does a Class 3 system offer redundancy?

A

At the system level

92
Q

How much seperation should be maintained between incoming services in a Class 3 Data Center?

A

20 m (66 ft)

93
Q

How many HDAs are required in each equipment distribution area in a Class 4 infrastructure?

A

Two

94
Q

How many single points of failure are permitted in a Class 4 infrastructure?

A

Zero

95
Q

What is the purpose of a redundant core switch?

A

Provide a backup connection to each server through a second network

96
Q

What is the main challenge associated with designing a cabling system in the CR?

A

Expected useful life of the cabling infrastructure

97
Q

Name three topologies that are used in a Computer Room (CR)

A
  • Centralized
  • End of Row
  • Top of Rack
98
Q

Which Computer Room (CR) topology uses the most cabling?

A

Centralized

99
Q

Name two advantages of a centralized toplogy

A
  • Centralized acces to all switch connections
  • Equipment cost savings (less equipment)
100
Q

How many levels of switches are used in an end of row topology?

A

Two

101
Q

Does the end of row topology use more or less cabling than the centralized topology?

A

Less

102
Q

Which topology uses more switches: centralized or end of row?

A

End of Row

103
Q

Which data center topology uses the least amount of cabling?

A

Top of Rack

104
Q

What type of design is recommended for a campus network?

A

Centralized

105
Q

Name two hardware components associated with a multisite network

A
  • Switch with telecom circuit interface
  • Telecom circuit linking site to SP facility
106
Q

Name three components that are used to direct message traffic in a multisite network

A
  • Dedicated PTP circuit
  • Private network
  • Public internet
107
Q

Name three dedicated circuit designes that can be used for a WAN with dedicated circuits

A
  • Centralized
  • Partial Mesh
  • Full Mesh
108
Q

What is a WAN hub

A

A central site in a WAN where two or more remote sites are linked

109
Q

What is a disadvantage associated with centralized WAN designs?

A

The potential for total WAN failure in the event of a disruption at the WAN hub

110
Q

How does a partial mesh WAN design eliminate the risk of a single point of failure?

A

By linking each site in the WAN to two other sites

111
Q

How does a full mesh WAN design link sites?

A

It links each site to all other sites in the WAN

DB (19 decks)

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