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

WAN protocols Flashcards

1
Q

What WAN technology uses a PPP connection, terminal adapters to connect equipment to the line and uses Bandwidth on Demand Interoperability Group to combine 2 bearer channels into one?

A

ISDN

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2
Q

What are the two bandwidth specifications with Frame Relay?

A

1) Access rate

2) Committed Information Rate

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3
Q

The maximum at which the Frame Relay interface can transmit is known as what?

A

The Access rate

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4
Q

CIR denotes what?

A

the maximum bandwidth of data guaranteed to be delivered.

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5
Q

if your committed burst rate and Maximum Burst Rate (MBR) exceed the Access Rate, what happens?

A

the frames will be dropped

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6
Q

How are Frame Relay PVCs linked to the DTE end devices?

A

By Data Link Connection Identifiers (DLCIs)

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7
Q

PPP works at what layers of the OSI model and relies on what other protocol to build and maintain data-link connections?

A

Data-Link layer and Physical. Relies on Link Control Protocol

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8
Q

The basic purpose of PPP is what?

A

to transport layer 3 packets across a data-link layer, point-to-point link.

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9
Q

In the PPP stack, the Network Control Protocol sits in what layer of the OSI model? Does this mean PPP works at layer 3?

A

Layer 3

No, PPP only functions at Layer 1 and Layer 2. NCP just allows it to transport Layer 3 protocols.

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10
Q

List the 5 PPP Link Control Protocol options

A

1) Authentication
2) Compression
3) Error Detection
4) Multilink
5) PPP Callback

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11
Q

Quality and Magic number options are used for what in LCP?

A

Error Detection

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12
Q

What PPP feature allows you to keep track of usage?

A

PPP Callback

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13
Q

The 3 phases of a PPP session establishment are?

A

1) Link-establishment phase
2) Authentication phase
3) Network layer protocol phase

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14
Q

in PPP session establishment, link-quality determination can occur at what phase?

A

the Authentication phase

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15
Q

how often does CHAP authenticate during a PPP session?

A

At the beginning and peridocailly throughout the session

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16
Q

What WAN protocol uses a hub sites with multiple spokes where the spokes don’t need to traverse the hub, conserve WAN bandwidth and are thus a cheaper option that leased circuits?

A

Dynamic Multi-Point VPNs

17
Q

Broadly, what does SIP provide an organization?

A

Streaming media and unified communications

18
Q

What protocol is a connection-oriented service and works by setting up virtual connections and transmitting data in 53-bytes cells?

A

ATM

19
Q

Why is ATM inefficient?

A

because of the small pay-load size to header

20
Q

Which WAN protocol was designed to support the forwarding of protocols other than TCP/IP and imposes labels to packets and uses them to forward packets

A

MultiProtocol Label Switching

21
Q

What makes MPLS fast?

A

Routing look-ups are only done on the edge routers and they’re only forwarded by core routers

22
Q

Ethernet cannot be connected to MPLS. TRUE or FALSE?

A

False, Ethernet over MPLS exists!

23
Q

What term describes a transmission medium that carries multiple signals, that carry a wide range of frequencies, that’s faster than dial-up and is always on highspeed connection?

A

Broadband

24
Q

What is a more cost effective solution to dedicate leased line that would allow you to terminate multiple circuits from different branch offices on the same physical interface at the HQ?

A

Frame Relay using Data Link Connection Identifiers

25
Q

What’s the main reason for the development of PPPoE?

A

PPP was mainly suitable for low-bandwidth dialup connections. When DSL and Cable broadband came along, it was better to let the hosts using it use the ISP’s ethernet network, rather than the dial-up. Because ethernet has no inherent authentication/encryption mechanism and PPP does, PPP over Ethernet was born.

26
Q

Which WAN protocol was designed to simplify and improve the performance of the routing process?

A

MPLS

27
Q

What is frame filtering?

A

The technique that switches use to ensure that frames are sent only to the ports that match the destination MAC address. It’s what saves all the bandwidth!

CompTIA Network+, Wide Area Networks (6 decks)

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