Network+ Chapter 16

Question 1

What is a WAN ?

pg 577

Answer 1

Its a telecommunications network or computer network that extends over a large geographical distance. Wide area networks often are established with leased telecommunication circuits.

Question 2

What is a PSTN?

Answer 2

Public Switched Telephone Network-the first successful network able to establish voice communications.

Question 3

________is equipment that’s owned by the service provider but located on the subscriber’s (your) property.
p. 577

Answer 3

Customer Premises Equipment

Question 4

___________is a Layer 1 device that connects the serial ports on your router to the provider’s network and connects directly to the demarcation point (demarc) or location.
pg 577

Answer 4

CSU/ DSUChannel service unit/ data service unit

Question 5

Define a copper line repeater?

p. 578

Answer 5

A copper line driver or repeater allows for a demarc extension length of up to 5,000 feet from the telephone company’s demarc.

Question 6

A cable consisting of a pair of copper wires called the ___________ connects the demarc to the closest switching office, known as a _________?

p. 579

Answer 6

Local Loop

Central office

Question 7

____________________is a trunk line inside a WAN provider’s network. This network is a collection of switches and facilities owned by the ISP.

p. 579

Answer 7

toll network

Question 8

what are 3 types of POTs ?

p 579

Answer 8

PSTN via ISDN, DSL,

Question 9

What are Two key concepts to keep in mind about PSTN are _____________
p 579

Answer 9

They are public and switched.

Question 10

Define public PSTN?

pg 579

Answer 10

anyone can lease the use of the network without being required to run any cabling for a small fee

Question 11

What are 3 types o Wan connection types discussed on page 580-581?

Answer 11

Dedicated (Leased) Lines
Circuit Switching
Packet Switching

Question 12

Dedicated leased lines are usually referred to as________? pg 580

Answer 12

point-to-point or dedicated connections.

Question 13

What are the Max Speeds of T1,T1c,T2,T3,T4 connections?

pg 583

Answer 13

T1  1.544 Mbps
T1c    3.152 Mbps
T2  6.321Mbps
T3 44.736 Mbps
T4 274.176 Mbps

Question 14

How nay pairs of copy wires are in a T1 connection?

pg 583

Answer 14

2

Question 15

______________is a technology that multiplexes several optical carriers on a single optical fiber by using different wavelengths. Remember, fiber-optic signals are light, so using different wavelengths of the light spectrum is somewhat like using different frequencies in a radio wave.

p. 585

Answer 15

Wavelength Division Multiplexing

Question 16

______________also called fiber to the premises, is a new option for connecting homes and business to the Internet.

p. 586

Answer 16

Passive Optical Network

Question 17

What is a Microwave radio relay?

pp. 586-587

Answer 17

Its a technology for transmitting digital and sometimes even analog signals between two locations on a line-of-sight radio path through the atmosphere.

Question 18

________________is an artificial satellite stationed in space for telecommunications purposes.

p. 587

Answer 18

communications satellite

Question 19

What are 3 types of communications satellites discussed in this chapter? pg 587

Answer 19

Geostationary orbits

Molniya orbits

Low-polar and non-polar Earth orbits from which the satellite can first boost communications signals and then send them back to earth

Question 20

What are four types of DSL implementations?

pg 590

Answer 20

High Bit-Rate Digital Subscriber Line (HDSL)
Symmetric Digital Subscriber Line (SDSL)
Very High Bit-Rate Digital Subscriber Line (VDSL)
Asymmetric digital subscriber line (ADSL)

Question 21

How many customers can a Distribution Network support? pg 591

Answer 21

100-2000

Question 22

VDSL2 systems utilize bandwidths of up to________ to provide data rates exceeding________ simultaneously in both the upstream and downstream directions.
p. 590

Answer 22

30MHz

100Mbps

Question 23

what are the down links and up links if Wi-Max? pg 594

Answer 23

down- 5-6 Mbps

up- 2-3 Mbps

Question 24

What are the down and up links of LTE? pg 594

Answer 24

Down - 7-12 Mbps

Up- 3-5 Mbps

Question 25

What are the 5 PPP encapsulation options offer?

Answer 25

Authentication
Compression
Error Detection
Multilink
PPP Call Back