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Network+ > Ch. 14 Packet > Flashcards

Ch. 14 Packet Flashcards

1
Q

Which device takes a circuit and combines it with a few hundred other circuits into a single complex circuit on one wire?

A

Multiplexer

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2
Q

Which technology is used by multiplexers to separate individual voice calls by keeping every call in its own unique frequency range?

A

Frequency division multiplexing (FDM)

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3
Q

Which digital signal rate does a central office use to convert analog voice signals before multiplexing them into larger circuits?

A

DS0

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4
Q

Which device converts an analog signal to digital and a digital signal to analog?

A

Modulator-demodulator

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5
Q

How many copper wires are used by a T1 line?

A

two pairs

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6
Q

Which device connects to each end of a T1 connection?

A

CSU/DSU

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7
Q

Which digital signal rate is used by a T1 line?

A

DS1

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8
Q

Which digital signaling rate has a frame containing a framing bit and 24 channels where each channel holds a single 8-bit DS0 data sample?

A

DS1

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9
Q

What is the data transfer speed for DS1?

A

1.544 Mbps

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10
Q

How many channels are in a T1 bundle?

A

24

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11
Q

What is the European counterpart to a T1 line?

A

E1

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12
Q

What is the approximate total bandwidth of an E3 line?

A

34 Mbps

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13
Q

What is the low end speed of the SONET Optical Carrier specification (OC-1)?

A

51.8 Mbps

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14
Q

Which term refers to the first generation of packet-switching technology?

A

X.25

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15
Q

Which term refers to a technology that serves as a replacement for Frame Relay and ATM switching?

A

Multi-Protocol Label Switching (MPLS)

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16
Q

What is the range of transfer speed for ATM?

A

155.52 to 622.08 Mbps and beyond

17
Q

What is the size of an ATM fixed-length cell?

A

53 bytes

18
Q

Which test should a network administrator run on a CSU/DSU to test a WAN connection and verify the T-carrier connection from end to end?

A

BERT

19
Q

Which phone line has a baud rate of 2,400 and uses an RJ-11 connector?

A

PSTN

20
Q

Which device takes 8-bit-wide digital data, converts it into 1-bit-wide digital data, and then hands it to a modem for conversion to analog?

A

UART

21
Q

What is the current modem standard now on the market?

A

V.92

22
Q

When you install an ISDN terminal adapter (TA), what special number provided by the telephone company must be configured along with the other ISDN telephone number you want to call?

A

Service Profile ID (SPID)

23
Q

Which statement describes an ISDN PRI?

A

ISDN PRI is a full T1 line, carrying 23 B channels.

24
Q

Which terms refer to versions of DSL service?

A

SDSL and ADSL

25
Q

Which term describes a DSL device that is located in a central office, connecting multiple DSL customers to the Internet?

A

DSLAM

26
Q

What is the maximum distance between a user’s demarc and the central office for all versions of DSL?

A

18,000 feet

27
Q

In the most common DSL connection, what device is connected to a telephone wall jack and to a standard NIC in your computer?

A

DSL modem

28
Q

If you have cable Internet service, what protocol is used between the head end connection and the cable company’s network?

A

DOCSIS

29
Q

Long Term Evolution (LTE) networks feature speeds (in theory) of up to __________ Mbps for downloads and 75 Mbps for uploads.

A

300

30
Q

Which technology tries to bring usable Internet access to homes and businesses through the electrical power grid?

A

BPL

31
Q

To make rollouts affordable, most fiber-to-the-home technologies employ a version of __________ architecture that uses a single fiber to the neighborhood switch and then individual fiber runs to each final destination.

A

PPPF

32
Q

Which standard, developed by Citrix, is used with a remote terminal connection?

A

ICA

33
Q

Which term refers to the standard used by the vast majority of VoIP solutions?

A

RTP

34
Q

Which protocol is commonly used to stream video?

A

RTSP

Network+ (9 decks)

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