Ch16 Wide Area Networks

Question 1

What is a dedicated lease line?

Answer 1

A point-point dedicated connection. They provide a pre-established WAN communications path from the customer premises to the provider network

Question 2

What is circuit switching?

Answer 2

A type of communications ion which a dedicated channel is established for the duration of a transmission.

Question 3

What is packet switching?

Answer 3

A mode of data transportation in which a message is broken down and each part is sent interdependently.

Question 4

T1 Leased line max speed

Answer 4

1.544 Mbps

Question 5

T3 max speed

Answer 5

44.736 Mbps

Question 6

E1 max speed

Answer 6

2.048 Mbps

Question 7

E3 max speed

Answer 7

34.368 Mbps

Question 8

OC-1 data rate

Answer 8

51.84 Mbps

Question 9

OC-3 data rate

Answer 9

155.52 Mbps and is used with Sonnet

Question 10

OC-12 data rate

Answer 10

622.08 Mbps

Question 11

OC-48 data rate

Answer 11

2.488Gbps

Question 12

OC-192 data rate

Answer 12

9.593Gbps

Question 13

___is a layer one device that connects the serial ports on your router to the providers network and connects directly to the demarcation point.

Answer 13

CSU/DSU

Question 14

___is a method by which multiple analog or digital signals are combined into one signal over a shared medium.

Answer 14

Multiplexing

Question 15

WDM is what?

Answer 15

A technique in fiber optic transmission that enables the sue of multiple light wavelengths to send data over the same medium.

Question 16

DWM does what?

Answer 16

Uses different wavelengths to send multiple optical carriers data over a single fiber.

Question 17

___uses larger chunks of the light spectrum, and is defined by wavelengths

Answer 17

CWDM(course wavelength division multiplexing)

Question 18

True or false CWDM can reach longer distances then DWDM

Answer 18

False

Question 19

____provides T1/E1 types speeds symmetrically for both uploading and downloading data

Answer 19

SDSL

Question 20

____ provides faster data transmission over single, flat, untwisted or twisted copper wire pairs; it is capable of supporting high-bandwidth applications like HDTV and telephone services like VoIP and general Internet access over a single connection

Answer 20

VDSL

Question 21

VDSL provides bit rate of up to ___

Answer 21

100 Mbits

Question 22

ADSL is provides ___download speeds and ___upload speeds

Answer 22

24 Mbit/s down and 3.5 Mbit/s up

Question 23

DOCSIS stands for?

Answer 23

Data over cable service interface specification.

Question 24

DOCSIS supports

Answer 24

High speed data transfer 4 Mbit/s through 100 Mbit/s

Question 25

A digital, point-to-point, dial-up WAN technology capable of maximum transmission speeds of about 2Mbps is____

Answer 25

ISDN

Question 26

BRI ISDN includes_____

Answer 26

``` two 64kbit B channels one 16kbit (signaling)D channel ```

Question 27

PRI ISDN includes____ for T1

Answer 27

23B channels + D

Question 28

E1 PRI includes____

Answer 28

30B + D + alarm channel

Question 29

___is a technology in which variable-length packets are transmitted by switching; packet-switching involves breaking messages into chunks at the sending device.

Answer 29

Frame Relay

Question 30

What does Frame Relay provide?

Answer 30

Reliable communication lines | error handling mechanisms that discard packets full of errors

Question 31

Frame relay operates at which layers of the OSI model?

Answer 31

Layer1 and Layer2

Question 32

___ is a data link layer protocol that can be used over either asynchronous serial (dial-up) or synchronous serial (ISDN) media;

Answer 32

PPP

Question 33

PPP provides

Answer 33

Authentication compression error detection

Question 34

___ is a method for encapsulating datagrams over serial links.

Answer 34

HDLC(high level data link control)

Question 35

___ is a method of establishing and configuring different Network layer protocols for transport across the PPP link.

Answer 35

NCP(network control)

Question 36

____ is designed to be a high-speed communications protocol that doesn’t depend on any specific LAN topology. It uses a high-speed cell-switching technology that can handle data as well as real-time voice and video. This protocol breaks up transmitted data into 53-byte cells

Answer 36

ATM(asynchronous transfer mode)

Question 37

____a data-carrying mechanism that emulates some properties of a circuit-switched network over a packet-switched network; it’s a switching mechanism that imposes labels (numbers) to packets and then uses them to forward the packets;

Answer 37

MPLS

Question 38

____ is a standard developed by the European Telecommunications Standards Institute (ETSI)

Answer 38

GSM(global systems for mobile communications) 2G networking

Question 39

CDMA stand for what?

Answer 39

Code division multiple access. 2G networking

Question 40

HSPA+ provides___up and ___down

Answer 40

84 Mits down, 22 Mbits up

Question 41

WIMAX is a ___ standard

Answer 41

IEEE 802.16

Question 42

WIMAX supports ___down & ___up

Answer 42

37 Mbits down, 17Mbits up

Question 43

LTE provides ___down, and ___up

Answer 43

300 Mbits down, 75 Mbits up