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NATIONAL OPEN UNIVERSITY OF NIGERIA
UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
OCTOBER/NOVEMBER 2014 EXAMINATION
COURSE CODE: CIT 311
COURSE TITLE: Computer Networks
DURATION: 3 Hours
INSTRUCTIONS: Answer any four questions in all.
Q1a. What is Computer network? [5 marks]
Q1b. Write short note on geographical coverage classification of Networks and give one example each [12.5marks]
Q2a. Write short note on the Goals/Motivation of Computer Network [10 mark]
Q2b. Enumerate the three characteristics of LANs that distinguished it from other kinds of networks
Q3a. What is Packet switched network? [7.5 marks]
Q3b. Write short note on the two types of Network [10 marks]
Q4a. What is a digital signal? [5.5 marks]
Q4b. Differentiate between OSI Reference Model & TCP Reference Model [12 marks]
Q5a. Write short note on IEEE Standard 802.4 and Ethernet [8.5 marks]
Q5b. Write short note on IEEE Standard 802.3 and Ethernet [9 marks]
Q6a. Write short note on IEEE Standard 802.5 and Ethernet [7.5 marks]
Q6b. Differentiate between a continuous and discrete signal [10 marks]
