Lesson 8

Question 1

Which network is used for localized networking

Answer 1

LAN

Question 2

Which type of network covers large areas and cites

Answer 2

WAN

Question 3

Can WANs be public or private

Answer 3

Y

Question 4

When WANs spans the globe, what are they called

Answer 4

GAN

Question 5

With a few exceptions . most layer 2 protocols were designed to work in either one network type or the other, but not in both.

Answer 5

T

Question 6

Who owns most of the LAN infrastructure

Answer 6

The company/customer

Question 7

Name some WAN devices

Answer 7

Modem
Access Server
WAN Switch
CSU/DSU
ISDN Terminal Adapter

Question 8

Types of Modems

Answer 8

Cable
DSL
Dial-Up

Question 9

DTE

Answer 9

Data termination equipment

Customer device

Question 10

DCE

Answer 10

Data communications equipment

Question 11

Circuit Switching

Answer 11

One endpoint creates a single path to another

Circuit means a connection between two endpoints

Question 12

Packet Switching

Answer 12

Data is transmitted in small broken units

Each packet takes the best route

Question 13

Give an example of a circuit switched network

Answer 13

PSTN

Question 14

Should you use packet switching when transmitting Media or video

Answer 14

No

The packets will not arrive at the same time

Question 15

Virtual Circuit Switching

Answer 15

Switching to transfer packets on logical circuits that do not have physical resources such frequencies or time slots allocated.

Question 16

Which switching technique merges Packet switching and circuit switching

Answer 16

Virtual switching

Question 17

Name the two types of virtual switching circuit types

Answer 17

Permanent

Switched

Question 18

Permanent

Answer 18

d

Question 19

Switched

Answer 19

f

Question 20

Cell Switching is similar to what

Answer 20

Packet switching

Question 21

Cell Switching

Answer 21

Data is transmitted in fixed cells instead of variable length cells

If the fixed cell is not filled with data it will be filled with filler info

Question 22

Which switching technique makes it easy to track how much data is moving on a network

Answer 22

Cell Switching

Question 23

Do WANs and LANs both use buses, stars, meshes, and rings

Answer 23

Yes

Question 24

Do WANs use multipoint and point to point connections

Answer 24

Yes

Question 25

Topic B

Answer 25

Topic B

Question 26

What are the types of WAN connectivity

Answer 26

Cable DSL Dial Up

Question 27

DSL

Answer 27

Digital Subscriber Lines Point to point connectivity over phone lines Uses ATM technology Operates at Layer 1 and 2 Anlog POTs uses low freq on line DSL uses high freq on line

Question 28

What hampers DSL

Answer 28

Distance | Quality of Lines

Question 29

Name the types of DSL

Answer 29

Asymmetric DSL Symmetric DSL High Bit Rate DSL Very High Bit Rate DSL see pg 317

Question 30

Cable Internet access

Answer 30

Uses cable wire and cable modems for connectivity Contention based access

Question 31

Cable speed varies based on what

Answer 31

Number of nodes in the contention group

Question 32

Dial Up Connections

Answer 32

PSTN connections that uses dial up modems Slow and long connection wait times

Question 33

Leased Data Lines

Answer 33

Path that is available 24 hours a day

Question 34

Which is more expensive Leased lines or VPNs

Answer 34

Leased lines

Question 35

Satellite Media

Answer 35

Provides long range comms Hampered by weather

Question 36

Topic C

Answer 36

Topic C

Question 37

What covers a large geographic area or connects smaller networks

Answer 37

WAN

Question 38

Describe ATM

Answer 38

Cell switching technology Supports high speed voice video and data Standardized in 1988 The glue that connects disparate networks LAN to WAN connections made seamless Complex and costly Connection oriented End to end QoS (guaranteed for virtual channels)

Question 39

ATM operates at which layers

Answer 39

Layer 1 and 2

Question 40

How is ATM data passed

Answer 40

In fixed packets of 53 bytes

Question 41

ATM networks are made up of which device

Answer 41

Switches

Question 42

What uses a Layer 2 addressing scheme similar to a phone number

Answer 42

ATM

Question 43

What guarantees that ATM data is reassembled in the proper order

Answer 43

Cell sequencing

Question 44

What is the Internet de facto standard

Answer 44

IP and Packet switching

Question 45

What is the underlying technology for DSL

Answer 45

ATM

Question 46

Why is ATM so versatile

Answer 46

``` Bandwidth options Types of traffic Fixed Cell size QoS Traffic shaping Real Time Data support ```

Question 47

What are the two types of ATM network Interfaces

Answer 47

User to network interface Network to network interface

Question 48

Is a switch a network to network ATM interface device

Answer 48

Yes

Question 49

Is ATM a channelized service

Answer 49

No

Question 50

Does ATM make channel reservations

Answer 50

No All bandwidth is available to all nodes

Question 51

Individual ATM connections are called what

Answer 51

Virtual Channels

Question 52

What makes virtual connections with other switches to provide a data path from an end point to another endpoint

Answer 52

ATM switch

Question 53

Virtual channels with a common path are tied together into what

Answer 53

Virtual Paths

Question 54

VCI

Answer 54

Virtual channel identifier

Question 55

VPI

Answer 55

Virtual path identifier

Question 56

How can you form a transmission path

Answer 56

by combining multiple virtual paths

Question 57

Wha is WAN protocol that functions at layers 1 and 2 of the OSI?

Answer 57

Frame relay

Question 58

Is Frame Relay a packet switched technology

Answer 58

Yes

Question 59

Frame relay provides reliable communication lines and efficient error handling mechanism by

Answer 59

discarding erroneous data frames

Question 60

Pg 323

Answer 60

Pg 323