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Network + > Section 11 > Flashcards

Section 11 Flashcards

1
Q

3 WAN connection types

A

Dedicated Leased Line
Circuit Switched Connection
Packet-Switched Connection

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2
Q

Dedicated Leased Line

A

Point to point connection between two sites
All bandwidth all the time
Expensive
Digital circuits

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3
Q

Circuit-Switched Connection

A

Connection is brought up only when needed, like making a phone call

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4
Q

Packet-Switched Connection

A

Always on
Multiple customers share bandwidth
SLAs used to guarantee a certain quality

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5
Q

CSU/DSU

A

Channel Service Unit/Data Service Unit
Terminates the digital signal at customer location
Dedicated leased line

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6
Q

Metro ethernet

A

Ethernet interfaces to customers
Less expensive than specialized ports used in CSU/DSU
Technology used hidden from customer

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7
Q

PPP

A

Point-to-point protocol

Layer 3 protocol on dedicated leased lines to transmit layer 3 protocols simultaneously

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8
Q

LCP

A 
PPP Link Control Protocol
Multilink interface
Looped link detection
Error detection
Authentication
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9
Q

PPP Authentication methods

A

Password Authentication Protocol (PAP)
Challenge-Handshake Authentication Protocol (CHAP)
Microsoft Challenge-Handshake Authentication Protocol (MS_CHAP)

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10
Q

PAP

A

Password Authentication Protocol
Performs one-way authentication between slient and server
Credentials in clear text

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11
Q

CHAP

A

Challenge-Handshake Authentication Protocol
Performs one-way authentication using three-way handshake
Hashed credentials

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12
Q

MS-CHAP

A

Microsoft Challenge-Handshake Authentication Protocol

Microsoft version of CHAP

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13
Q

PPPoE

A

PPP over ethernet

Commonly used with DSL modes

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14
Q

DSL

A

Digital Subscriber Line

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15
Q

ADSL

A 
Asymmetric DSL
Maximum distance to DSLA: 18k ft
Voice and data on same line
Downstream: 8Mbps
Upstream: 1.544 Mbps
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16
Q

SDSL

A 
Symmetric DSL
Maximum distance to DSLAM: 12k ft
No simultaneous voice and data on same line
Downstream: 1.168 Mbps
Upstream: 1.168 Mbps
17
Q

VDSL

A

Very High Bit-Rate DSL
Maximum distance to DSLAM: 4k ft
Downstream: 52Mbps
Upstream: 12 Mbps

18
Q

Cable Modems

A

Hybrid-Fiber Coax (HFC) - cable tv containing both coaxial and fiber-optic
Specific frequencies for Downstream and upstream
Upstream: 5MHz tp 42MHz
Downstream: 50MHz to 860MHz

19
Q

Satellite Modems

A

Rural/remote locations
Low bandwidth
Weather

20
Q

POTS

A

Plain Old Telephone Service
Analog connections using Public Switched Telephone Network (PSTN)
Max bandwidth: 53.3 kbps

21
Q

ISDN

A

Integrated Services Digital Network

Older technology using B channels

22
Q

Frame Relay

A

Sites connected to virtual circuits
Low cost and widely available
On-demand
Layer 2 technology

23
Q

SONET

A 
Synchronous Optical Network 
Layer 1 technology using fiber
155 Mbps to 10Gbps
20km to 250km
Bus or Ring topology

Network + (16 decks)

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