UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
INFORMATION TECHNOLOGY/ APPLIED COMPUTING/ SOFTWARE
DEVELOPMENT/ INFORMATION SECURITY & FORENSICS
BIT1102A BAC1107 BSD1107 BISF1105 INTERNET TECHNOLOGY
FULL TIME,PART TIME,DISTANCE LEARNING
DATE: AUGUST, 2019 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.
QUESTION ONE
a) Describe how a computer using DNS resolves the IP address of a domain name. (6 Marks)
b) Explain why two different search engines may provide different results when provided with the
same search term. (3 Marks)
c) The terms Internet and World Wide Web are frequently used as if they are the same thing. Give a
definition for each term that makes the distinction clear. (4 Marks)
d) Explain Three-Way Handshake Mechanism used by TCP to terminate a Session reliably.
(6 Marks)
e) Differentiate between physical addressing and logical addressing (2 Marks)
f) Describe three problems experienced while using hosts.txt for that mapping host names to the
numerical addresses of computers on the ARPANET (3 Marks)
g) Explain atleast six functions of the processes that run on intermediary network devices
(6 Marks)
QUESTION TWO
a) Why is there a growing demand for high-speed Internet access through mobile devices such as smart
phones? (4Marks)
b) (i) It is said that there is a difference between the internet and the World Wide Web (WWW).
Highlight and briefly explain this difference. (4 Marks)
(ii) Describe briefly how you would connect to the internet using your smart phone as hotspot.
(4 Marks)
c) Explaining their roles differentiate between ARP and RARP (4 Marks)
d) (i) Describe the function of IP addresses (2 Marks)
(ii) Given the IP address 169.243.98.3, what class of IP does it belong to? Show your working.
(2 Marks)
QUESTION THREE
a) Switching is a process used to forward packets coming in from one port to a port leading towards the
destination. Discuss the following switching techniques. (4Marks)
i. Circuit switching
ii. Packet switching
b) Three essential components of the World Wide Web are; Browsers, Websites and Web Pages. For
each of the three components describe what they are and their function. (9 Marks)
c) Explain the importance of NAT in the context of IPv4 addressing (3 Marks)
d) Identify at least two threats that can occur when using the internet and provide possible defensive or
preventative measures. (4 Marks)
QUESTION FOUR
a) 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. ICANN
ii. IANA
iii. IAB
b) Compare and contrast public and private IP addresses and briefly explain when each is appropriate.
(4 Marks)
c) Given the example URL below, identify its component parts:
https://www.studytonight.com/computer-networks/network-topology-types (4 Marks)
d) It is said that WWW is modeled on a client/server model. Briefly describe how a client/server model
works. (4 Marks)
e) List and briefly explain the two pieces of information one can get from an IP address.
(2 Marks)
QUESTION FIVE
a) Using Truecaller as an example of an application that resolves phone numbers to names, explain
how a Domain Name Service works. [4 Marks]
b) One can not discuss the history of the internet without mentioning ARPA.
(i) What is ARPA in full? [2 Marks]
(ii) What was the role of ARPA in the realization of the internet as we know it today?
[4 Marks]
c) What is the difference between the following commands?
(i) ipconfig and ipconfig /all [2 Marks]
(ii) ping and pathping [2 Marks]
(iii) tracert and nslookup [2 Marks]
d) List and briefly explain the two pieces of information one can get from a MAC address.
[4 Marks]
