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Internet Technology Question Paper
Internet Technology
Course:
Institution:
question papers
Exam Year:
2009
UNIVERSITY EXAMINATIONS: 2008/2009
FIRST YEAR EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE IN INFORMATION TECHNOLOGY
BIT 1107: INTERNET TECHNOLOGY
DATE: AUGUST 2009 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE [30 MARKS]
(a) Explain the meaning of the following:
(i) The Internet. [3 Marks]
(ii) Connection-oriented service. [3 Marks]
(iii)Domain Name System (DNS) [3 Marks]
(iv) Packet switching. [3 Marks]
(b) (i) List three network-application user agents that you use on a daily basis. [3 Marks]
(ii) Differentiate between Client and Server. [4 Marks]
(c) (i) What is the difference between persistent HTTP with pipelining and persistent HTTP without
pipelining? Which of the two is used by HTTP/1.1? [4 Marks]
(ii) What is meant by a handshaking protocol? [4 Marks]
(iii) What information is used by a process running on one host to identify a process running on
another host? [3 Marks]
QUESTION TWO [20 MARKS]
(a) Consider an e-commerce site that wants to keep a purchase record for each of its customers.
Describe how this can be done with HTTP authentication. Describe how this can be done with
cookies. [6 Marks]
2
(b) (i) Why is it said that FTP sends control information "out of band"? [4 Marks]
(ii) Explain why an application developer may choose to run its application over UDP rather than
TCP. [4 Marks]
(c) Why are buffers needed at the output ports of switches? Why are buffers needed at the input port of
switches? [6 Marks]
QUESTION THREE [20 MARKS]
(a) TCP and UDP are both transport layer protocols, with partially overlapping feature sets. What are
some features found in:
(i) TCP, but not UDP? [2 Marks]
(ii) UDP, but not TCP? [2 Marks]
(iii)Separately in both TCP and UDP? [2 Marks]
(b) How are flow control and congestion control related problems? How does TCP accomplish each?
[6 Marks]
(c) Why is a packet that is received after its scheduled playout time considered lost? [3 Marks]
(d) List five non-proprietary internet applications and the application-layer protocols that they use.
[5 Marks]
QUESTION FOUR [20 MARKS]
(a) On your homework Web page, you want to present a warning message in red and bold. Please
write one line of HTML that will make that happen. The content of the warning message is up to
you. [5 Marks]
(b) Use the following diagram depicting an Ethernet LAN to answer the questions that follow:
3
Using the above diagram, mark the paths that would be used for sending data over the
following routes. (Make sure to label the paths):
(i) Host A to Host H. [3 Marks]
(ii) Host I to Host J. [3 Marks]
(iii)Host D to Host F. [3 Marks]
(c) (i) Differentiate between End-to-end delay and Delay Jitter. [4 Marks]
(ii) Why do HTTP, FTP, SMTP, POP3 and IMAP run on top of TCP rather than UDP?
[2 Marks]
QUESTION FIVE [20 MARKS]
(a) (i) On your homework Web page, you want your name to appear in italics in a large font. Write
one line of HTML that will make that happen. [5 Marks]
(ii) Give one reason that streaming multimedia is run over UDP rather than TCP: [3 Marks]
(b) (i) Give one reason that DNS lookups are run over UDP rather than TCP: [4 Marks]
(ii) Why is there a minimum packet size on Ethernet? [4 Marks]
(ii) Why is there a maximum packet size on Ethernet? [4 Marks]
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