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CompTIA Network+, Wide Area Networks > WAN terms > Flashcards

WAN terms Flashcards

1
Q

Smart Jack’s provide what 3 things?

What two other names is it also known by?

A

1) signal conversion
2) signal compensation
3) diagnostic capability for the CP
4) AKA Network Interface Device (NID)/Network Interface Unit (NIU)

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2
Q

Copper Line Drivers can extend the demarc by up to how many feet?

A

5000 feet

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3
Q

What type of WAN uses synchronous serial lines up to 45Mbps and generally cost the most?

A

Dedicated Leased Lines

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4
Q

Dedicated leased lines typically use what two types of encapsulation protocols?

A

HDLC and PPP

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5
Q

Which type of WAN is the cheapest and used mostly for low-bandwidth transfers?

A

Circuit Switched WAN

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6
Q

Which WAN type is suitable for bursty, intermittent data transfer and provide speeds between 56K and 45Mbps?

A

Packet Switched WAN

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7
Q

circuit switched WANs eliminate the need for addressing because there is only one end-point. TRUE or FALSE

A

True

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8
Q

How many DS0 channels does a T1 line utilize, what is the total speed?

A

24 channels. 1.544Mbps

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9
Q

T1 lines use the DS0 signalling standard to transmit packets. TRUE or FALSE?

A

FALSE, T1 uses DS1 signalling standard to transmit packets and it multiplexes 24 DS0 channels.

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10
Q

Match the T-line speeds to the T-line number

a) 3.152Mbps
b) 6.312Mbps
c) 44.736Mbps
d) 274.176Mbps

A

a) 3.152Mbps - T1C
b) 6.312Mbps - T2
c) 44.736Mbps- T3
d) 274.176Mbps - T4

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11
Q

The European version of T1 uses how many channels and what is the bandwidth?

A

32 channels. 2.048Mbps

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12
Q

What’s the Digital Signal type used for packet transmission and the number of channels used in the T3 connection?

A

DS3. 670 DS0 channels.

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13
Q

Name 5 packet switching WAN technologies

A

Frame Relay, X.25, ATM, xDSL, MPLS

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14
Q

WANs commonly use what type of network topology? Why?

A

Ring. Because they’re resilient to faults.

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15
Q

Give 2 examples of circuit switched WAN technology.

A

PSTN

ISDN

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16
Q

Which WAN technology utilizes Ethernet virtual connections to connect campus networks together to act like a large geographic LAN?

A

Metropolitan Ethernet

17
Q

Which WAN technology builds Permanent Virtual Circuits to connect locations?

A

Frame Relay

18
Q

Which WAN technology uses broadband singalling?

A

CATV (in practice tests, not in guides)

19
Q

SVCs (switched virtual circuits) are circuits used in circuit switching WAN technologies, TRUE or FALSE?

A

TRUE

*although this can be but rarely is, implemented in ATM

20
Q

Which WAN technology is a connection-oriented, packet switching service that transmits fixed cells of 53Bytes at speeds as low as 1.5Mbps upto 10Gpbs?

21
Q

What protocol used by xDSL allows for automatic discovery of the DSLAM?

22
Q

Smart Jacks are usually used with what types of circuits?

A

ISDN or T/E circuits and is the first device they pass-through coming into the customer premises at the demarc

23
Q

Which authentication methods are used by PPP?

A

PAP
CHAP
EAP

24
Q

What does a VoIP gateway do?

A

it allows an VoIP PBX (an IP Network) to interface with an existing TDM PBX (traditional phone PBX) or directly to the PSTN Network

25
Q

What equipment could you use to enable POTS enabled devices like faxes and alarms to make use of a VoIP connection

A

VoIP gateway

26
Q

What’s the main benefit of using VoIP PBX over a TDM PBX (a.k.a traditional phone PBX)?

A

No vendor lock in and you’re only using one network (IP) network instead of a separate data and phone network.

27
Q

What does a SIP trunk do?

A

It provides a connection between the private domain (the organization) and public domain (the PSTN or PLMN (Public Land Mobile Network)

28
Q

What is a CSU/DSU basic function?

A

allows a LAN router on a private network to access the lease line WAN connection

29
Q

Which WAN technology offers both PVCs and SVCs

A

Frame Relay. Switched virtual circuits are normally only associated with PSTN and ISDN, but this is a configuration available in Frame Relay too but is only really ever used privately and not offered by telcos as a service.

30
Q

Associate the following to the correct WAN protocols of either Frame Relay or ATM.

1.544Mbps max speed
Uses Permanent Virtual Circuits which assigned to Data Link Connection Identifiers
Speed between 1.5Mbps  and 10Gbps
Transmits fixed cells of 53-bytes
Is used in SONET
A 
1.544Mbps max speed - Frame Relay
Uses Permanent Virtual Circuits which assigned to Data Link Connection Identifiers - Frame Relay
Speed between 1.5Mbps  and 10Gbps - ATM
Transmits fixed cells of 53-bytes - ATM
Is used in SONET - ATM

CompTIA Network+, Wide Area Networks (6 decks)

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