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Network + > Lesson 8 > Flashcards

Lesson 8 Flashcards

1
Q

Which network is used for localized networking

A

LAN

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2
Q

Which type of network covers large areas and cites

A

WAN

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3
Q

Can WANs be public or private

A

Y

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4
Q

When WANs spans the globe, what are they called

A

GAN

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5
Q

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

A

T

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6
Q

Who owns most of the LAN infrastructure

A

The company/customer

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7
Q

Name some WAN devices

A 
Modem
Access Server
WAN Switch
CSU/DSU
ISDN Terminal Adapter
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8
Q

Types of Modems

A

Cable
DSL
Dial-Up

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9
Q

DTE

A

Data termination equipment

Customer device

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10
Q

DCE

A

Data communications equipment

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11
Q

Circuit Switching

A

One endpoint creates a single path to another

Circuit means a connection between two endpoints

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12
Q

Packet Switching

A

Data is transmitted in small broken units

Each packet takes the best route

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13
Q

Give an example of a circuit switched network

A

PSTN

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14
Q

Should you use packet switching when transmitting Media or video

A

No

The packets will not arrive at the same time

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15
Q

Virtual Circuit Switching

A

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

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16
Q

Which switching technique merges Packet switching and circuit switching

A

Virtual switching

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17
Q

Name the two types of virtual switching circuit types

A

Permanent

Switched

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18
Q

Permanent

A

d

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19
Q

Switched

A

f

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20
Q

Cell Switching is similar to what

A

Packet switching

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21
Q

Cell Switching

A

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

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22
Q

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

A

Cell Switching

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23
Q

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

A

Yes

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24
Q

Do WANs use multipoint and point to point connections

A

Yes

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25
Q

Topic B

A

Topic B

26
Q

What are the types of WAN connectivity

A

Cable
DSL
Dial Up

27
Q

DSL

A

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

28
Q

What hampers DSL

A

Distance

Quality of Lines

29
Q

Name the types of DSL

A

Asymmetric DSL
Symmetric DSL
High Bit Rate DSL
Very High Bit Rate DSL

see pg 317

30
Q

Cable Internet access

A

Uses cable wire and cable modems for connectivity

Contention based access

31
Q

Cable speed varies based on what

A

Number of nodes in the contention group

32
Q

Dial Up Connections

A

PSTN connections that uses dial up modems

Slow and long connection wait times

33
Q

Leased Data Lines

A

Path that is available 24 hours a day

34
Q

Which is more expensive Leased lines or VPNs

A

Leased lines

35
Q

Satellite Media

A

Provides long range comms

Hampered by weather

36
Q

Topic C

A

Topic C

37
Q

What covers a large geographic area or connects smaller networks

A

WAN

38
Q

Describe ATM

A

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)

39
Q

ATM operates at which layers

A

Layer 1 and 2

40
Q

How is ATM data passed

A

In fixed packets of 53 bytes

41
Q

ATM networks are made up of which device

A

Switches

42
Q

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

A

ATM

43
Q

What guarantees that ATM data is reassembled in the proper order

A

Cell sequencing

44
Q

What is the Internet de facto standard

A

IP and Packet switching

45
Q

What is the underlying technology for DSL

A

ATM

46
Q

Why is ATM so versatile

A 
Bandwidth options
Types of traffic
Fixed Cell size
QoS
Traffic shaping
Real Time Data support
47
Q

What are the two types of ATM network Interfaces

A

User to network interface

Network to network interface

48
Q

Is a switch a network to network ATM interface device

A

Yes

49
Q

Is ATM a channelized service

A

No

50
Q

Does ATM make channel reservations

A

No

All bandwidth is available to all nodes

51
Q

Individual ATM connections are called what

A

Virtual Channels

52
Q

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

A

ATM switch

53
Q

Virtual channels with a common path are tied together into what

A

Virtual Paths

54
Q

VCI

A

Virtual channel identifier

55
Q

VPI

A

Virtual path identifier

56
Q

How can you form a transmission path

A

by combining multiple virtual paths

57
Q

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

A

Frame relay

58
Q

Is Frame Relay a packet switched technology

A

Yes

59
Q

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

A

discarding erroneous data frames

60
Q

Pg 323

A

Pg 323

Network + (13 decks)

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