Question 1

Explain the differences between CIR and MAR.

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Question 2

With IP services, the ________ at the sending site takes the outgoing message which usually is an Ethernet frame containing an IP packet), strips off the Ethernet frame and uses the IP address in the IP packet to route the packet though the carrier's packet‐switched network to its final destination.
A)PAD
B)gateway
C)switch
D)router
E)WAN

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Question 3

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 4

Describe the three types of VPN.

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Question 5

Where does packetizing take place?

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Question 6

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

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Question 7

Which of the following is not a way to reduce network demand?
A)shifting network usage from high cost times to lower cost times
B)using data compression techniques for all data in the network
C)requiring a network impact statement for all application software developed by the organization
D)moving data further from the applications and people who use them
E)shifting network usage from peak to lower demand times

Accepted Answer

Moving data further from the applications and people who use them would increase network demand and latency, as it requires more time and resources to transmit data between distant locations. All other choices (A, B, C, and E) are effective ways to reduce network demand, such as using compression techniques, scheduling network usage during low-demand times, and requiring an impact statement for new applications to ensure they don't strain the network excessively.

Question 8

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

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Question 9

What are the main benefits of using a VPN?

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Question 10

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

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Question 11

How does a SVC differ from a PVC?

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Question 12

Dynamic routing:
A)imposes an overhead cost by increasing network traffic
B)decreases performance in networks which have many possible routes
C)decreases performance in networks with "bursty" traffic
D)should be used in 80 to 90 percent of total networks' capacity
E)is another term for static routing in WANs

Accepted Answer

Dynamic routing protocols exchange routing information to determine the best path for data packets to take through a network. This exchange of information can increase network traffic, thus imposing an overhead cost.

Question 13

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

While the prestige value of using a particular common carrier may be a consideration for some businesses, it is not a key issue that should be considered when selecting a WAN service. The key issues to consider are flexibility, capacity, control, and reliability.

Question 14

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

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Question 15

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 16

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

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Question 17

Most IP services use _______ as the data link layer protocol.
A)Ethernet
B)TCP
C)MPLS
D)IRoute
E)T1

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Quiz 9: Wide Area Networks