2.5 Compare and contrast WAN technologies.

Question 1

What is DSL

Answer 1

Digital Subscriber Line. Service through the phone line :-)

Question 2

How does DSL work

Answer 2

is a type of high-speed internet connection that uses existing telephone lines to transmit data without interfering with voice service.

Question 3

Two types of DSL connections.

Answer 3

1. Symmetrical: Symmetrical connection provides equal bandwidth for upload and download.
2. Asymmetrical: It provides more bandwidth for download and less for upload since downloading rate is higher when compared to uploading for most users.

Question 4

Disadvantages of DSL

Answer 4

Performance degrades as the distance between the Central Office and the user increases.

Question 5

What is coaxial cable?

Answer 5

Cable Internet uses coaxial cable TV Cable connection to provide Internet services.

Question 6

Disadvantages of Cable

Answer 6

but one of the disadvantages is shared bandwidth among the neighbors, which can degrade the performance if multiple users are connected at the same time.

Question 7

What is a Leased line

Answer 7

is a leased dedicated circuit between two endpoints (locations)

Question 8

Advantage of leased line

Answer 8

It provides high speed, maximum bandwidth, higher security and good QoS (Quality of Service) since the user gets Internet services over a connection that is just dedicated to them and not shared with anyone.

Question 9

What is a Site to Site Data Connection:

Answer 9

leased line provider will provide the leased lines to different locations.

Question 10

what is a Site to Network Connection

Answer 10

In a site to network leased connection, the leased line provider will provide the leased line to the user and provide Internet services at the same time.

Question 11

What is Metro-Optical connection

Answer 11

The most common type of connection. It is to provide Fiber optical connection to the end-users as much as possible.

Question 12

What are copper cables

Answer 12

made of copper. It uses pulses of electric signals to transmit data.

Question 13

Unshielded Twisted Pair Cable (UTP)

Answer 13

8 copper wires twisted in pairs forming 4 pairs

Question 14

Speed and length of Unshielded twisted pair.

Answer 14

The speed can vary between 10 to 1000 Mbps, and the maximum segment length of this cable can be 100m.

Question 15

Shielded Twisted Pair Cable (STP):

Answer 15

8 copper wires twisted in pairs forming 4 pairs. Each Pair is shielded with a metallic foil. Good for noise reduction in areas with lots of interferance. Should be grounded.

Question 16

Speed and length of Shielded Twisted Pair Cable (STP):

Answer 16

The speed can vary between 1000 Mbps to 40 Gbps, and maximum segment length for this cable can be 100m.

Question 17

What is Mbps and how large is one

Answer 17

megabits per second. A million bits. or a about one small photo per second.

Question 18

what is GBPS

Question 19

What is a bit?

Answer 19

zero or one.

Question 20

What is MBps

Answer 20

MegaBytes per second.

Question 21

How many bits is a byte?

Answer 21

8.

Question 22

PRI

Question 23

Satellite

Question 24

Wireless

Question 25

MPLS

Answer 25

Multiprotocol Label Switching. Replacement for Frame Relay and ATM Switching

Question 26

What does MPLS do

Answer 26

sends packets along predetermined network paths

Question 27

What is Routing?

Answer 27

Routers refer to internal routing tables to make decisions about how to route packets along network paths.

Question 28

ATM Service

Question 29

Frame relay service

Question 30

PPPoE

Answer 30

Point to point protocol over Ethernet. Encapsulate PPP frames into ethernet frames. Also more secutiry forcing you t o sign into DSL to use it.

Question 31

PPP protocol

Question 32

DMVPN

Answer 32

Dynamic multi point VPN. enables direct VPN connections between Mutiple locations directly.

Question 33

SIP and H.323

Answer 33

Session Initiation protocol. Handles the initiation, setup and delivery of VoIP sessions. Also enables multicasting.

Question 34

SIP and H.323 both run on top of

Answer 34

Real-time Transport Protocol (RTP)

PG 253

Question 35

Most VoIP solutions are either

Answer 35

SIP/RTP of H.323/RTP

Question 36

Demarcation point

Answer 36

Where the outside world and home/office connection meets.
If something brakes on your side it’s your problem on ISP side it’s theres.

Question 37

CSU/DSU

Question 38

Smart jack

Question 39

MLPS Label

Answer 39

A unique identifier used by MPLS capable routers to determin how to move data

Question 40

MPLS Experimental Bits (exp)

Answer 40

A A relative calue useed to determine the importance of the labed packer to be able to prioritize some pacjets over others

Question 41

Bottom of label stack (S)

Answer 41

single packet may have multiple MPLS labels. Single bit value is set to 1 for the initial label

Question 42

MPLS topology

Answer 42

MPLS routers use their existing dynamic routing protocols to send each other messages about their overhead.

Question 43

TTL

Answer 43

A vaule that dermines the number of hops the labes can make before it’s eliminated.

Question 44

QoS

Answer 44

Sorting IP packets to provide priority based on header info.

Question 45

What do MPLS routers do

Answer 45

avoid running packets through a routing table and instead use header info to route packets quickly.

Question 46

What marks where a service provirer responsibiles ends and the company responibity begins?

Answer 46

Demarcation point

Question 47

DOCSIS us used by whch type of company

Answer 47

Cables

Question 48

What is DOCSIS

Answer 48

Data over cable service interface spectification

Question 49

MPLS lables are located between which two layers of

Answer 49

Ethernet frame at layer 2 and IP packet at layer 3

Question 50

CSU/DSU

Answer 50

Channel service unit/digital service unit