LAN: Chapter 7: Homework Review

Question 1

In X.25, each DTE is connected to a DCE through a(n) _________________.

Answer 1

PAD

Question 2

Currently, ____ is the most commonly used form of DSL.

Answer 2

ADSL

Question 3

The X.25 _________ layer governs physical and electrical connectivity to communications adapters and the communications cable.

Answer 3

Physical Protocol

Question 4

Frame relay includes an option, called ___________, to transmit voice signals over the network to reduce long-distance telephone costs between sites.

Answer 4

VoFR

Question 5

The “T” in NTU stands for ____.

Answer 5

Termination

Question 6

here is/are ____ demand channel(s) in BRI ISDN.

Answer 6

1

Question 7

____ is an older flow control technique that uses a Ctrl+S to pause transmission and a Ctrl+Q to restart transmission.

Answer 7

XON/XOFF

Question 8

A fiber optic technology that can transmit data faster than one gigabit per second.

Answer 8

SONET

Question 9

Enables the transmission rate to vary depending on whether the communication is data, multimedia, or voice.

Answer 9

RADSL

Question 10

A transport method developed by regional telephone companies to provide cell-based, high-speed communications over MANs and WANs.

Answer 10

SMDS

Question 11

Originally designed for UNIX environments for point-to-point communications between computers, servers, and hosts using TCP/IP.

Answer 11

SLIP

Question 12

This protocol defines communications between DTEs and DCEs.

Answer 12

X.25

Question 13

A standard for delivering data services over telephone lines, with a current practical limit of 1.536 Mbps.

Answer 13

ISDN

Question 14

A widely used remote communications protocol that supports TCP/IP, NetBEUI, and IPX/SPX communications over WANs.

Answer 14

PPP

Question 15

Developed for compatibility with Plug and Play.

Answer 15

G.lite ADSL

Question 16

A form of digital subscriber line technology that is often used for video conferencing or online learning. The upstream and downstream transmission rates are the same.

Answer 16

SDSL

Question 17

The first “P” in PAP stands for

Answer 17

Password

Question 18

Which is not a method of connecting BRI ISDN into the customer?

Answer 18

Using a multiplexor or a PBX.

Question 19

Before transmitting data, ADSL checks the telephone line for noise and error conditions in a process called Answer

Answer 19

forward error correction