Chapter 13

Question 1

What is the signal rate for DS0?
A) 1.544 Mbps
B) 64 Kbps
C) 2.048 Mbps
D) 128 Kbps

Answer 1

B) DS) operates at a constant rate of 64 kbps.

Question 2

Which of the following provides the fastest throughput?
A) PSTN
B) ISDN BRI
C) ADSL
D) POTS

Answer 2

C) ADSL can run up to 15 Mbps

Question 3

What is the popular Microsoft remote access server program called?
A) RRAS
B) Dail-Up Networking
C) Dail-Up Server
D) Microsoft Client for networks.

Answer 3

A) The popular Microsoft remote access server is called Routing and Remote Access Service, or RRAS.

Question 4

What device do you use to connect to a T1 line?
A) Router
B) CSU/DSU
C) Modem
D) WIC-2T

Answer 4

B) CSU/DSU is required to connect to a T1 line.

Question 5

BRI ISDN uses\_\_\_\_\_\_\_?
A) 1 B channel and 24 D channel
B) 24 B channel and 1 D channel
C) 1 B channel and 2 D channels
D) 2 B channel and 1 D channel

Answer 5

D) BRI ISDN uses 2 B channels and 1 D channel.

Question 6

The V.90 standard defines a modem speed of\_\_\_\_\_\_\_?
A) 56 Kbps
B) 33.6 K baud
C) 28.8 Kbps
D) 2400 baud

Answer 6

A) The V.90 standard defines a 56-Kbps modem speed.

Question 7

You have just had DSL installed at your house. Although the internet connection is fast, your phones no longer work. What is the problem?
A) The installer failed to install the POTS filter on the phones.
B) Nothing; the phones can’t function at the same time as the internet.
C) The house phone lines can’t handle the bandwidth of both the phone and DSL.
D) The DSL modem is missing the filter and is causing line interference.

Answer 7

A) The problem is that the installr did not install POTS filters on the jacks with phone attched.

Question 8

What protocol do cable modem use?
A) ACMSIS
B) CMAS
C) DOCSIS
D) CCSIP

Answer 8

C) Cable Modems use DOCSIS (Data Over Cable Service Interface Specification)

Question 9

What is SONET used for?
A) Short-distance, High-Speed, Fiber-Optic Transmission
B) Long-distance, High-Speed, Fiber-Optic Transmission
C) Long-distance, Low-Speed, Copper CableTransmission
D) Short-distance, Low-Speed, Copper Cable Transmission

Answer 9

B) SONET is used for Long-Distance, High-Speed, Fiber-Optic Transmission.

Question 10

What does SIP stand for?
A) Standard Initiation Protocol
B) System Internetworking Protocol
C) Session Initiation Protocol
D) Sector Information Protocol.

Answer 10

C) Session Initiation Protocol; SIP is one of the main protocols for VoIP.