UNIVERSITY EXAMINATIONS: 2017/2018
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY
BIT 1102A/BSD 1107/BISF 1105/BAC 1107- INTERNET TECHNOLOGY/
INTERNET TECHNOLOGIES & THE WEB
FULL TIME/PART TIME/DISTANCE LEARNING
DATE: AUGUST, 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 mapping host names to the
numerical addresses of computers on the ARPANET 6 Marks
QUESTION TWO
a) Two or more networks or network segments can be connected using devices such as a router (Router is
a layer three device which forwards data packet from one logical network segment to another) to form
internetwork. In this regard, give a detailed comparison for intranet and internets with respect to
following:
Scope
Regulation
Ownership
Access
8 Marks
b) Discuss the following communication services as used on the Internet:
(i) Weblogs 2 Marks
(ii) Wikis 2 Marks
c) Discuss the following transport layer functions:
(i) Establishing a Session. 2 Marks
(ii) Reliable Delivery 2 Marks
(iii) Same Order Delivery 2 Marks
(iv) Flow Control 2 Marks
QUESTION THREE
a) Describe four window TCP/IP utilities used in troubleshooting the internet (include their use)
8 Marks
b) Identify three common Internet security risks 3 Marks
c) Explain Three-Way Handshake Mechanism used by TCP to terminate a Session reliably. 3 Marks
d) Write HTML code that will display the following output: 6 Marks
QUESTION FOUR
a) Explain how a web search engine builds its database and resolves a query. 4 Marks
b) Explain THREE problems faced by web search engines. 3 Marks
c) Briefly explain atleast three effective methods of conducting internet research 5 Marks
d) Explain why two different search engines may provide different results when provided with the
same search term. 3Marks
e) Why is the WWW referred to as the World Wide Wait? 5 Marks
row 1, cell 1 row 1, cell 2
row 2, cell 1 row 2, cell 2
QUESTION FIVE
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. 4 Marks
c) Briefly explain the roles of the following devices 4 Marks
i. Switch
ii. Router
iii. Hub
iv. Bridge
d) Write down an example of an URL and explain its individual parts. 2 Marks
e) 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
