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EB Study for n006 > Ch16 Wide Area Networks > Flashcards

Ch16 Wide Area Networks Flashcards

1
Q

What is a dedicated lease line?

A

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

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2
Q

What is circuit switching?

A

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

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3
Q

What is packet switching?

A

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

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4
Q

T1 Leased line max speed

A

1.544 Mbps

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5
Q

T3 max speed

A

44.736 Mbps

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6
Q

E1 max speed

A

2.048 Mbps

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7
Q

E3 max speed

A

34.368 Mbps

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8
Q

OC-1 data rate

A

51.84 Mbps

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9
Q

OC-3 data rate

A

155.52 Mbps and is used with Sonnet

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10
Q

OC-12 data rate

A

622.08 Mbps

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11
Q

OC-48 data rate

A

2.488Gbps

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12
Q

OC-192 data rate

A

9.593Gbps

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13
Q

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

A

CSU/DSU

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14
Q

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

A

Multiplexing

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15
Q

WDM is what?

A

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

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16
Q

DWM does what?

A

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

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17
Q

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

A

CWDM(course wavelength division multiplexing)

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18
Q

True or false CWDM can reach longer distances then DWDM

A

False

19
Q

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

A

SDSL

20
Q

____ 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

A

VDSL

21
Q

VDSL provides bit rate of up to ___

A

100 Mbits

22
Q

ADSL is provides ___download speeds and ___upload speeds

A

24 Mbit/s down and 3.5 Mbit/s up

23
Q

DOCSIS stands for?

A

Data over cable service interface specification.

24
Q

DOCSIS supports

A

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

25
Q

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

A

ISDN

26
Q

BRI ISDN includes_____

A 
two 64kbit B channels 
one 16kbit (signaling)D channel
27
Q

PRI ISDN includes____ for T1

A

23B channels + D

28
Q

E1 PRI includes____

A

30B + D + alarm channel

29
Q

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

A

Frame Relay

30
Q

What does Frame Relay provide?

A

Reliable communication lines

error handling mechanisms that discard packets full of errors

31
Q

Frame relay operates at which layers of the OSI model?

A

Layer1 and Layer2

32
Q

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

A

PPP

33
Q

PPP provides

A

Authentication
compression
error detection

34
Q

___ is a method for encapsulating datagrams over serial links.

A

HDLC(high level data link control)

35
Q

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

A

NCP(network control)

36
Q

____ 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

A

ATM(asynchronous transfer mode)

37
Q

____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;

A

MPLS

38
Q

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

A

GSM(global systems for mobile communications) 2G networking

39
Q

CDMA stand for what?

A

Code division multiple access. 2G networking

40
Q

HSPA+ provides___up and ___down

A

84 Mits down, 22 Mbits up

41
Q

WIMAX is a ___ standard

A

IEEE 802.16

42
Q

WIMAX supports ___down & ___up

A

37 Mbits down, 17Mbits up

43
Q

LTE provides ___down, and ___up

A

300 Mbits down, 75 Mbits up

EB Study for n006 (17 decks)

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