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计算机网络代写|CS3357A Final Examination

本次加拿大代写是一个计算机网络相关的限时测试

Part I — Multiple Choice, True/False — Choose the best answer from the choices given.
Circle your answer on the paper. [60 marks total, 2 marks each]

1. Hosts can be found on the network edge.

a. True.
b. False.

2. Consider this screen shot from a terminal:

The above image depicts:

a. The output from the ping command.
b. The output from the traceroute command.
c. Network latency times.
d. Both b. and c.
e. Both a. and c.

3. What term is used to describe two ISPs connecting directly to each other to
exchange data freely amongst themselves, without charging one another for data
transferred?

a. Multi-homing.
b. Fault tolerance.
c. Point of presence.
d. Peering.
e. Centralizing.

4. Which of the following are benefits of an ISP increasing the number of connections to
other ISPs in the Internet?

a. Improved reliability.
b. Increased bandwidth.
c. Reduced delays.
d. All of the above.
e. None of the above.

5. In theory, circuit switching supports more users on a network than packet switching.

a. True.
b. False.

6. A DNS server responsible for country domains (e.g., .ca, .co.uk, .cn) is known as
a/an:

a. Root name server.
b. Local name server.
c. Top-level domain name server.
d. Authoritative name server.
e. Recursive name server.

7. DNS lookups often involve a combination of recursive and iterative queries.

a. True.
b. False.

8. The transfer of an HTML file from one host to another is:

a. Loss-intolerant and time insensitive.
b. Loss-intolerant and time sensitive.
c. Loss-tolerant and time insensitive.
d. Loss-tolerant and time sensitive.
e. None of the above.

9. Suppose that a Web server runs in Host C on server port 80. Suppose this Web
server uses persistent connections and is currently receiving requests from two
different Hosts: A and B.

1. Are all of the requests being sent through the same socket on Host C?

2. If they are being passed through different sockets, do both of the sockets use
server port 80?

a. 1. No.
2. Yes.
b. 1. No.
2. No.
c. 1. Yes.

2. Not applicable.

10. All web servers use port 80 to listen for client requests.

a. True.
b. False.


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