BIT1102A  INTERNET TECHNOLOGY.

UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY
BIT1102A INTERNET TECHNOLOGY
FULL TIME/PART TIME/DISTANCE LEARNING
DATE: DECEMBER, 2018 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) TCP/IP protocols had several important features that allowed them to meet the need for worldwide data
communication. Explain briefly any three of these features. 3 Marks
b) Internet access is the ability of individuals and organizations to connect to the Internet using computers
and other devices. There are many ways a computer or a terminal can connect to the internet. From this
background, compare the following Internet connection types
i. DSL and ISDN
ii. Cable connection and leased line
c) Briefly discuss the history of the Internet. 5 Marks
d) Describe how a computer using DNS resolves the IP address of a domain name. 6 Marks
e) Internet is a global network of networks through which computers communicate worldwide. How then
does data move around through this global network? The answer is switching. Switching is a process used
to forward packets coming in from one port to a port leading towards the destination. From this
background discuss the following switching techniques. 4 Marks
i. Circuit switching
ii. Packet switching
f) Internet governance is the development and application of shared principles, norms, rules, decisionmaking procedures, and programs that shape the evolution and use of the Internet. In this context, discuss
the main role for each of the following internet governance bodies: 6 Marks
i. the Internet Engineering Task Force (IETF),
ii. the Internet Research Steering Group (IRSG),
iii. the Internet Research Task Force (IRTF.
g) Describe three problems that were experienced while using hosts.txt for that mapping host names to the
numerical addresses of computers on the ARPANET 6 Marks
QUESTION TWO
a) Discuss the following communication services as used on the Internet: (4Marks)
(i) Weblogs
(ii) Wikis
b) Discuss the difference between classful and classless IP addressing (4 Marks)
c) State the security challenges of having mobile phones accessing the internet (4 Marks)
d) Discuss how Network address translation works (4 Marks)
e) Explain why two different search engines may provide different results when provided with the
same search term. (4 Marks)
QUESTION THREE
a) Describe four Windows TCP/IP utilities used in troubleshooting the internet (include their use)
(8 Marks)
b) Explain Three-Way Handshake Mechanism used by TCP to terminate a Session reliably.
(6 Marks)
c) Describe the components of the URL using a suitable example (4 Marks)
d) Identify atleast four port numbers that are useful on the Internet (2 Marks)
QUESTION FOUR
a) Outline the role of protocols as applied to the Internet and name three protocols frequently used on
the Internet. (4 Marks)
b) Explain how the Domain Name System allows computers to contact each other to exchange email
or display web pages. (6 Marks)
c) Briefly explain the roles of the following devices (4 Marks)
i. Switch
ii. Router
iii. Hub
iv. Bridge
d) HTTP error codes are three digit numbers with the first digit defining the class of the status code. Explain
the following status codes (6 Marks)
i) 2xx
ii) 4xx
iii) 5xx
QUESTION FIVE
a) Explain the term “ Internet of things”. (4 Marks)
b) Why is the internet based on the client server architecture? (3 Marks)
c) How does the Dynamic host configuration protocol give the IP addresses? (4 Marks)
d) What are the ranges in IPv4 IP classful addressing (5 Marks)
e) Why is the TCP better than UDP in internetworking (4 Marks)

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