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Chapter 15 Flashcards

1
Q

CAN

A

Campus Area Network
A network created by linking the
LANs located in two or more
buildings that are in close
proximity to each other.
TDMM.* Page 15-2

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2
Q

CR

A

Computer Room
An architectural space with
the primary function of
accommodating data
processing equipment.
TDMM.* Page G-43

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3
Q

HDA

A

Horizontal Distribution Area
A space in a computer room where
a horizontal cross-connect (HC) is
located, and may include LAN
switches, storage area network
(SAN) switches, and
keyboard/video/mouse (KVM)
switches for the end equipment
located in the equipment
distribution areas.
TDMM.* Page G-93

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4
Q

LAN

A

Local Area Network
Network that covers an area
generally associated with some
or all of the space within
a building.
TDMM.* Page 15-2

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5
Q

MAN

A

Metropolitan Area Network
A network that links the
networks located at two or
more sites within a city.
TDMM.* Page 15-2

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6
Q

MDA

A

Main Distribution Area
The space in an equipment
room where the main cross-
connect is located.
TDMM.* Page G-115

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7
Q

Network Architecture

A

The structured grouping of
hardware, software,
and applications.
TDMM.* Page 15-1

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8
Q

NIC

A

Network Interface Card
The hardware component that
connects a station to the
network medium.
TDMM.* Page 15-8

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9
Q

NOS

A

Network Operating Software
Integrated set of programs
designed to control and
coordinate all access to
network resources.
TDMM.* Page 15-14

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10
Q

OS

A

Operating System
The system software that
controls the execution of all
programs and the use of
resources on a device such
as a computer.
TDMM.* Page G-134

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11
Q

PAN

A

Personal Area Network
A network that covers an area
generally associated with an
individual workspace.
TDMM.* Page 15-1

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12
Q

SAN

A

Storage Area Network
A network of storage devices that
can be accessed by multiple
computers. Each computer on the
network can access hard drives in
the SAN as if they were local disks
connected directly to the
computer. It includes a specialized
high-speed network dedicated to
the transport of data between
storage devices and servers.
TDMM.* Page G-185

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13
Q

VoIP

A

Voice over Internet Protocol
A system in which voice signals
are converted to packets and
transmitted over a network using
transmission control protocol/
internet protocol (TCP/IP).
TDMM: Page G-207

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14
Q

WAN

A

Wide Area Network
An extended network that is
created by linking the networks
located at two or more sites,
distributed over geographic
distances that extend beyond
the span of a single
metropolitan area.
TDMM.* Page 15-3

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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
TDMM.* Page 15-1

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16
Q

Name the 5 types of
networks in terms of
geographical area.

A
  1. Personal
  2. Local
  3. Campus
  4. Metropolitan (or metro)
  5. Extended (or wide area)
    TDMM.* Page 15-1
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17
Q

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

A

Personal
TDMM.* Page 15-1

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18
Q

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

A

Extended (or wide area)
TDMM.* Page 15-1

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19
Q

How much area does
a PAN cover?

A

An area generally associated
with an individual workspace
TDMM.* Page 15-1

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20
Q

How much area does
a LAN cover?

A

An area generally associated
with some or all of the space
within a building
TDMM.* Page 15-2

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21
Q

How is a CAN created?

A

By linking the LANs located in
two or more buildings that are in
close proximity to each other
TDMM.* Page 15-2

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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
TDMM.* Page 15-2

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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 area
TDMM.* Page 15-3

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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
TDMM.* Page 15-4

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25
What is the objective of the OSI model?
To provide a structured approach for the development of all types of networks TDMM.* Page 15-4
26
True or False The OSI model can be used to describe any type of network.
True. Because it uses a broad definition of a system, the OSI model can be used to describe any type of network, from a residential LAN to the Internet. TDMM.* Page 15-4
27
Describe layering in terms of the OSI model.
An approach that divides various functions and services provided by a network into discrete groupings TDMM.* Page 15-5
28
How many layers are used in the OSI model?
7 TDMM.* Page 15-5
29
Which layer of the OSI model makes it possible for applications running on dissimilar systems to use a network to exchange information?
Layer 7 TDMM.* Page 15-5
30
Which layer of the OSI model is responsible for data conversion?
Layer 6 TDMM.* Page 15-5
31
Which layer of the OSI model synchronizes and manages data transfer between network devices?
Layer 5 TDMM.* Page 15-5
32
Which layer of the OSI model makes it possible to assign various levels of quality to the data transfer process?
Layer 4 TDMM.* Page 15-5
33
Which layer of the OSI model is responsible for internetwork data transfer?
Layer 3 TDMM.* Page 15-5
34
Which layer of the OSI model is responsible for intranetwork data transfer?
Layer 2 TDMM: Page 15-5
35
Which layer of the OSI model is responsible for the transfer of information over various media?
Layer 1 TDMM.* Page 15-5
36
What type of services are provided by Layer 7 of the OSI model?
Application TDMM.* Page 15-5
37
What type of services are provided by Layer 6 of the OSI model?
Presentation TDMM.* Page 15-5
38
What type of services are provided by Layer 5 of the OSI model?
Session TDMM.* Page 75-5
39
What type of services are provided by Layer 4 of the OSI model?
Transport TDMM: Page 15-5
40
What type of services are provided by Layer 3 of the OSI model?
Network TDMM.* Page 75-5
41
What type of services are provided by Layer 2 of the OSI model?
Data Link TDMM.* Page 15-5
42
What type of services are provided by Layer 1 of the OSI model?
Physical TDMM.* Page 15-5
43
How are layers in the OSI model connected?
In vertical form, also called a stack or protocol stack TDMM.* Page 15-6
44
What are the connection points between layers in a protocol stack?
Service APs TDMM.* Page 15-6
45
What happens in the OSI layers when a message transfer starts between two systems?
A peer-to-peer relationship is established between the corresponding layers in the protocol stack of each system. TDMM.* Page 15-6
46
Name 4 common types o network hardware.
1 .Stations 2.Servers 3.Switches 4.Routers TDMM.* Page 15-8
47
What device is used to access an organizational network?
Station TDMM.* Page 15-8
48
What type of station connects the network over cabling or a short-range wireless connection?
Local station TDMM.* Page 15-8
49
What type of station connects the network over a wired or wireless telecommunications circuit managed by an SP?
Remote station TDMM.* Page 15-8
50
What is the most common type of local station?
Desktop computer TDMM.* Page 15-8
51
When would a station be configured without internal storage devices and with the external storage devices disabled?
Whenever data security is critical TDMM.* Page 15-8
52
What hardware component connects a station to the network medium?
Network interface card (NIC) TDMM.* Page 15-8
53
Which device manages one or more resources shared by users and administrators on a network?
Server TDMM.* Page 15-9
54
Name 2 advantages of server virtualization.
1 .Space savings 2.Ease of configuration and maintenance by network administrators TDMM.* Page 15-9
55
What is server clustering?
Linking multiple servers together to provide greater performance and lower response times than a single server TDMM.* Page 15-10
56
What is failover access?
A process in which all activities for a single failed server will switch over to one or more of the other servers in a cluster TDMM.* Page 15-10
57
Define high availability in terms of server clustering.
The improved network reliability enabled by clustering TDMM.* Page 15-10
58
Which network access device provides a centralized point for LAN communications, media connections, and management activities?
Switch TDMM.* Page 15-70
59
At which OSI model layer(s) does a switch function?
1 .Layer 2 2.Layer 3 TDMM.* Page 15-10
60
What is a router?
A combination of hardware and software, typically in the form of a specialized device TDMM.* Page 15-70
61
What process allows network administrators to direct, modify, and refine network traffic flows on the basis of organizational priorities?
Traffic engineering (traffic shaping) TDMM.* Page 15-12
62
What term is used to describe the process of running multiple OSs simultaneously in a single server?
Server virtualization TDMM.* Page 15-13
63
How does storage virtualization provide flexibility?
By enabling many storage units to appear and be managed as a single consolidated pool on the network TDMM.* Page 15-13
64
Name the 4 components of a thin client device.
1 .Monitor 2.Keyboard 3.Mouse 4.Network connection TDMM.* Page 15-13
65
How does station virtualization improve security?
All data remains in the computer room (CR), so no information is lost if the thin client device is stolen. TDMM.* Page 15-13
66
Name 3 types of software that are used to transform a stand-alone computer into a network station.
1 .Drivers 2.Utilities 3.Clients TDMM.* Page 15-14
67
What type of software is needed to link a station's NIC to the OS?
Driver TDMM.* Page 15-14
68
What is an integrated set of programs designed to control and coordinate all access to network resources?
Network operating system (NOS) TDMM.* Page 15-14
69
What does the directory service of a NOS provide to users and administrators?
A global view of the organizational network TDMM.* Page 15-14
70
What is a flat network?
A conventional LAN that uses a single broadcast domain to span all of its hubs and switches as well as the devices connected to their ports TDMM.* Page 15-14
71
What devices does a VLAN use to divide a single broadcast domain into multiple smaller ones?
Routers TDMM.* Page 15-14
72
Name 3 advantages of implementing VoIP.
1 .Cost savings resulting from fewer telecommunications circuits 2. Toll-free calling 3.Simplified management of a single converged network TDMM.* Page 15-15
73
Define unified communications.
The convergence of VoIP technology with softphone capabilities, P TP video communications, instant messaging (chat) services, and presence (real-time status indicator) TDMM.* Page 15-16
74
Why might UC allow for fewer copper pairs to be provided to a building?
Because the majority of the voice connectivity runs over the data network TDMM.* Page 15-16
75
Why might some traditional analog lines need to remain in a building when a UC solution is implemented?
To accommodate fax lines, elevator phones, or other utility lines TDMM.* Page 15-16
76
What does real-time describe when it is applied to video communications?
The capture and transfer of video from its source to the screen With minimal delay TDMM.* Page 15-17
77
What does stored-and- forward describe when it is applied to video communications?
The process where video is stored for future playback TDMM.* Page 15-17
78
Name 2 criteria for classifying video services.
1 .Number of stations simultaneously receiving the same video content from the sending device 2.Direction of transfer of the video content TDMM.* Page 15-17
79
Name 4 types of video communications.
1 .PTP unidirectional 2.PTP bidirectional 3.Point-to-muItipoint unidirectional 4. Point-to-multipoint bidirectional TDMM.* Page 15-17
80
What type of network video communications transfers content in one direction and uses one station to receive the content?
Point-to-point unidirectional TDMM: Page 15-17, Figure 15.7
81
What type of network video communications transfers content in two directions and uses one station to receive the content?
Point-to-point bidirectional TDMM.* Page 15-17, Figure 75.7
82
What type of network video communications transfers content in one direction and uses more than one station to receive the content?
Point-to-multipoint unidirectional TDMM.* Page 15-17, Figure 15.7
83
What type of network video communications transfers content in two directions and uses more than one station to receive the content?
Point-to-multipoint bidirectional TDMM.* Page 15-17, Figure 75.7
84
What type of network video communications is used to send an image via webcam?
PTP unidirectional TDMM.* Page 15-18
85
What type of network video communications is used for webcasting?
Point-to-multipoint unidirectional TDMM.* Page 15-18
86
What type of network video communications is used for multiplayer gaming?
Point-to-multipoint bidirectional TDMM.* Page 15-18
87
Why is videoconferencing the most demanding network application from a resource perspective?
Because it requires a constant minimum data transfer rate between stations TDMM.* Page 15-18
88
Name the 2 design processes that are used to produce a comprehensive set of designs for a proposed network.
1 .FunctionaI (top-down) 2.Physical (bottom-up) TDMM.* Page 15-19
89
What does a network designer assess first during the functional design process?
Types of users and applications likely to be supported by the proposed network TDMM.* Page 15-19
90
What does a network designer assess first during the physical design process?
The sites where the proposed network is to be deployed TDMM.* Page 15-20
91
Where are computer rooms (CRs) traditionally used?
In data centers TDMM.* Page 15-21
92
Name the 2 primary components of network redundancy.
1. Telecommunications infrastructure 2.Hardware infrastructure TDMM.* Page 15-21
93
What topology class is used for the basic telecommunications infrastructure?
Class 1 TDMM.* Page 15-21
94
What is the primary difference between a Class 1 and a Class 2 telecommunications infrastructure?
In a Class 2 infrastructure, the ER is served by at least two connections from the same or different AP networks. The Class 1 infrastructure has only one connection to the AP network. TDMM: Page 15-22, Figures 15.10 and 15.11
95
Where does a Class 3 system offer redundancy?
At the system level TDMM.* Page 15-23
96
How much separation should be maintained between incoming services in a Class 3 data center?
20 m (66 ft) TDMM.* Page 15-23
97
How many HDAs are required in each equipment distribution area in a Class 4 infrastructure?
2 TDMM.* Page 15-24
98
How many single points of failure are permitted in a Class 4 infrastructure?
0 TDMM.* Page 15-24
99
What is the purpose of a redundant core switch?
It provides a backup connection to each server through a second network interface, thereby providing additional fault tolerance. TDMM.* Page 15-26
100
What is the main challenge associate with designing a cabling system in the CR?
The expected useful life of the cabling infrastructure TDMM.* Page 15-29
101
Name 3 topologies that are used in a CR.
1 .Centralized 2.End-of-row (in-row) 3. Top-of-rack TDMM: Page 15-29
102
Which CR topology uses the most cabling?
Centralized TDMM.* Page 15-30
103
Name 2 advantages of a centralized topology.
1 .Centralized access to all CR switch connections 2.Equipment cost savings due to the need for fewer switches than the other topologies TDMM.* Page 15-30
104
How many levels of switches are used in an end-of-row topology?
2 TDMM.* Page 15-31
105
Does the end-of-row topology use more or less cabling than the centralized topology?
Less TDMM.* Page 15-32
106
Which topology uses more switches: centralized or end-of-row?
End-of-row TDMM.* Page 15-32
107
Which data center topology uses the least amount of cabling?
Top-of-rack TDMM.* Page 15-32
108
What type of design is recommended for a campus network?
Centralized TDMM.* Page 15-33
109
Name 2 hardware components associated with a multisite network.
1 .Switch/router with internal or external telecommunications circuit interface(s) 2. Telecommunications circuit(s) linking site to the SP facility TDMM: Page 15-35
110
Name 3 components that are used to direct message traffic in a multisite network.
1 .Dedicated P TP circuit 2.Private network owned by one or more SP 3.Public Internet TDMM.* Page 15-36
111
Name 3 dedicated circuit designs that can be used for a WAN with dedicated circuits.
1 .Centralized 2.Partial mesh 3.Full mesh TDMM.* Page 15-36
112
What is a WAN hub?
A central site in a WAN where two or more remote sites are linked TDMM.* Page 15-36
113
What is a disadvantage associated with centralized WAN designs?
The potential for total WAN failure in the event of disruption at the central WAN hub TDMM: Page 15-37
114
How does a partial mesh WAN design eliminate the risk of a single point of failure?
By linking each site in the WAN to two other sites, so traffic can be rerouted in the event of a single link failure TDMM.* Page 15-37
115
How does a full mesh WAN design link sites?
It links each site to all other sites in the WAN. TDMM.* Page 15-40

MJ Class (23 decks)

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