Deck 13: Enterprise and Wide Area Networks

Question 1

____ switching reads enough of the frame to guarantee that the frame is at least the minimum size for the network type.

A)Fragment-free
B)Store-and-forward
C)Cut-through
D)Transparent

Answer 1

A

Question 2

Many packet-switching networks use channels to provide temporarily "dedicated" pathways between two points.

Answer 2

False

Question 3

A router using ____ routing uses a discovery process to find information about available routes.

A)automatic
B)static
C)dynamic
D)smart

Answer 3

C

Question 4

Data traveling in the download direction at a speed different from the upload direction is known as inconsistent communication.

Question 5

____ allow network administrators to group users and resources logically instead of by physical location.

A)WANs
B)VLANs
C)VPNs
D)PANs

Question 6

All versions of Windows, starting with Windows 95, include Dial-Up Networking (DUN)software to make an RRAS connection.

Question 7

DDS uses a communication device called a(n)____ to establish connections.

A)digital modem
B)DCE
C)NT
D)CSU/DSU

Question 8

Using a ____ algorithm, the router calculates a particular route's metric based on factors such as the number of routers between the two networks, the bandwidth of lines between networks, network congestion, and delays.

A)link-state
B)spanning-tree
C)cut-through
D)distance-vector

Question 9

One of the most widely used high-speed digital lines is the ____, a DDS technology that uses two two-wire pairs to transmit full-duplex data signals at a maximum rate of 1.544 Mbps.

A)ISDN
B)ADSL
C)T1
D)T3

Question 10

When using a ____ algorithm, the router relies on speed of the links, referred to as cost, between networks to determine the lowest metric.

A)link-state
B)spanning-tree
C)cut-through
D)distance-vector

Question 11

____ bridges are used primarily in token ring networks.

A)Table
B)Translation
C)Transparent
D)Source-routing

Question 12

A V.90 modem uses a technique called ____ that digitizes analog signals.

A)MP3
B)PCM
C)CODEC
D)WAV

Question 13

The device that passes data from the customer LAN to the DCE is called the data terminal equipment (DTE).

Question 14

____ bridges can connect different types of networks.

A)Table
B)Translation
C)Transparent
D)Source-routing

Question 15

A ____ represents the oscillation of a sound wave that carries one bit of data.

A)bps
B)baud
C)Hertz
D)Watt

Question 16

The International Telecommunications Union (ITU)developed the ____ standards to define modem speed.

A)V-series
B)RJ-series
C)M-series
D)RS-series

Question 17

The interface for ISDN is sometimes referred to as a(n)____.

A)digital modem
B)DCE
C)NT
D)CSU/DSU

Question 18

When the router receives a packet, it analyzes the packet's destination network address and looks up that address in its routing table.

Question 19

There are three primary synchronous communication protocols: SDLC, HDLC, and ____.

A)LAPD
B)V.90
C)bisync
D)PPP

Question 20

PSTN is a packet switched network.

Question 21

How does cut-through switching work?

Question 22

What is static routing?

Question 23

____ is the guaranteed minimum transmission rate that the frame relay service provider offers.

A)CIR
B)PCM
C)PVC
D)CSU

Question 24

To establish a WAN link to remote computers and networks, a LAN can use the same telecommunications network you use to talk on the phone; this network is often referred to as public switched telephone network (PSTN)or ______________________________ (POTS).

Question 25

Subscribing to one or more channels instead of an entire T1 is possible with a service called ____________________ T1.

Question 26

One type of frame error that can occur in a network is a(n)____________________, in which the frame is damaged because of a collision or a malfunctioning device, such as a NIC or hub.

Question 27

____________________ (DDS)lines are direct or point-to-point synchronous communication links with 2.4, 4.8, 9.6, or 56 Kbps transmission rates.

Question 28

____ virtual circuits are similar to leased lines, in that the pathway between two communication points is established as a permanent logical connection; therefore, the pathway exists even when it's not in use.

A)Automatic
B)Switched
C)Permanent
D)Manual

Question 29

The organization building the WAN is always referred to as the customer, and the equipment at the customer site that's usually the responsibility of the customer is called the ____.

A)NT
B)DCE
C)CSU/DSU
D)CPE

Question 30

The device that sends data to (and receives data from)the local loop is called ____.

A)NT
B)DCE
C)CSU/DSU
D)CPE

Question 31

Developed in the mid-1970s, the ____ specification provided an interface between public packet-switching networks and their customers.

A)ISDN
B)T1
C)V.90
D)X.25

Question 32

How does store-and-forward switching work?

Question 33

The connection between the demarcation point and the CO is called the local loop or ____________________.

Question 34

A(n)____________________ occurs when so many broadcast frames are sent on the network that other types of traffic can't be processed.

Question 35

____ is a digital communications technology developed in 1984 to replace the analog telephone system.

A)Switched 56K
B)ISDN
C)T1
D)T3

Question 36

With respect to a modem, what is asynchronous communication?

Question 37

____ virtual circuits are established when needed and then terminated when the transmission is completed.

A)Automatic
B)Switched
C)Permanent
D)Manual

Question 38

A(n)____ line has 28 T1s or 672 channels and supports a data rate of 44.736 Mbps.

A)switched 56K
B)ISDN
C)T1
D)T3

Question 39

What is a transparent bridge?

Question 40

____ leased lines are an older, digital, point-to-point communication link offered by local and long-distance telcos.

A)Switched 56K
B)ISDN
C)T1
D)T3

Question 42

With respect to a modem, what is synchronous communication?

Question 43

What is multiplexing?

Question 44

What is PPP?

Question 45

What is B-ISDN?

Question 46

What is SLIP?

Question 47

What is frame relay?