UNIVERSITY EXAMINATIONS: 2017/2018
EXAMINATION FOR THE DIPLOMA IN INFORMATION
TECHNOLOGY
DIT407: NETWORK DESIGN AND SETUP
DATE: APRIL, 2018 TIME: 2 HOURS
INSTRUCTIONS: Answer Question 1 AND any other TWO questions.
QUESTION ONE (COMPULSORY)
(a) With the aid of a diagram, explain the three-way handshake method used in a TCP/IP
network to create a connection between a local host/client and server. (4 Marks)
(b)
i Define DHCP (2 Marks)
ii Explain how DHCP clients obtain a DHCP lease for an IP address. (4 Marks)
c) Use the network address 192.168.0.0 with the subnet mask of /27 to answer the following
questions.
i. How many subnets does the chosen subnet mask produce?
ii. How many valid hosts per subnet are available?
iii. What are the valid subnets?
iv. What is the broadcast address of the First Subnet?
v. What is the valid host range in the second subnet? (10 Marks)
(d) Discuss the functions of any THREE application layer protocols (3 Marks)
(e) Using a diagram explain How Data breaks down on each layer of the OSI from top to
bottom? (7 Marks)
QUESTION TWO
a) Discuss the three layers of a hierarchical network design. [6 Marks]
b) State and explain FOUR key goals in a LAN design. [4 Marks]
c) Discuss FIVE primary functions of a LAN. [5 Marks]
d) Discuss FIVE building blocks of computer networks. [5 Marks]
QUESTION THREE
a) Highlight SIX organizational benefits of computer networks [6 Marks]
b) Briefly describe the responsibilities of a Network Administrator. [4 Marks]
c) Describe THREE switching methods. (6 Marks)
d) Discuss FOUR types of networks. [4 Marks]
QUESTION FOUR
(a) Explain any FOUR factors you would consider when selecting a Network Switch.
(8 Marks)
(b) Discuss THREE Medium Access Control Protocols. (6 Marks)
(c)
i. Explain the function of the Ping Utility. [2 Marks]
ii. John has a PC with the IP Address 192.168.21.10/24. He tries to ping Jane’s PC which
has 192.168.20.11/24 as its IP Address and gets no reply. Explain the reason why.
(2 Marks)
(d) Highlight TWO advantages of subnetting. [2 Marks]
QUESTION FIVE
(a) Discuss any THREE factors that affect networks (6 Marks)
(b) Differentiate between the following (4 Marks)
(i) Enterprise server and Workgroup server
(ii) MDF and IDF
(c) With the aid of a diagram, highlight TWO parts of a Class A IP address. (4 Marks)
(d) Convert the following IP addresses from Decimal to Binary.
(4 Marks)
195.168.10.145
172.16.0.111
e) Give TWO reasons why Wireless media would be preferred over cable media. (2 Marks)
