Question 1

Where does packetizing take place?

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Question 2

Using a chart format, list, define and briefly describe two dedicated circuit services and two packet switched services.

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Question 3

Compare and contrast frame relay, MPLS and Ethernet service networks.

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Question 4

Explain the differences between CIR and MAR.

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Question 5

Describe the three types of VPN.

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Question 6

Suppose you joined a company that had a WAN composed of SONET, T carrier services, and frame relay, each selected to match a specific network need for a certain set of circuits. Would you say this was a well-designed network? Explain.

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Question 7

Describe six ways in which a network manager might improve WAN service.

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Question 8

What are the main benefits of using a VPN?

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Question 9

Which WAN technology is designed to work with a variety of commonly used layer-2 protocols and is sometimes called a layer-2.5 technology because it inserts a 4-byte header that contains its own information between the layer-2 frame and the layer-3 IP packet?.
A)Ethernet
B)TCP
C)MPLS
D)IRoute
E)T1

Accepted Answer

The WAN technology described in the question is MPLS (Multi-Protocol Label Switching). It is designed to work with multiple layer-2 protocols, including Ethernet, and inserts a 4-byte header called a label between the layer-2 frame and the layer-3 IP packet. This label is used to efficiently route traffic through the network.

Question 10

Compare the ring, star, and mesh architectures.Provide one example of when each one might be better to use compared to the others.

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Question 11

Draw a diagram of packet switched service, and describe packet switching concepts.

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Question 12

How does a SVC differ from a PVC?

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Question 13

What are the benefits of IP services over other packet-switched options?

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Question 14

Which of the following is not a key issue to be considered when selecting a WAN service?
A)prestige value of using a particular common carrier
B)flexibility
C)capacity
D)control
E)reliability

Accepted Answer

Prestige value of using a particular common carrier is not a key issue as it does not directly affect the performance and functionality of the WAN service. The other options (flexibility, capacity, control, and reliability) are all important factors to consider when selecting a WAN service.

Quiz 9: Wide Area Networks