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Noun (National open university) Live 2019 POP Exam questions
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[QUOTE="Bracet, post: 3659, member: 477"] NATIONAL OPEN UNVERSITY OF NIGERIA University Village, Plot 91, Cadastral Zone, Nnamdi Azikiwe Expressway, Jabi, Abuja FACULTY OF SCIENCES APRIL 2019 EXAMINATION Course Code: CIT311 Time Allowed: 3 Hours Course Title: Computer Networks Course Credit Unit: 3 Instruction: Answer Question 1 and any other four questions Question 1 [LIST=1] [*]Mention any five properties that are desirable in a routing algorithm? (5 marks) [*]Give any five examples of domain names (5 marks) [*]Mention three kinds of interfaces that ATM interfaces supports? (3 marks) [*]Describe the basic operations of an ATM switch? (6 marks) [*]State the goals of the services of the network layer of the OSI model? (3 marks) [/LIST] Question 2 [LIST=1] [*]In appropriate order, mention the seven layers of ISO OSI Reference Model (7 marks) [*]What is the difference between data rate and bandwidth? (5 marks) [/LIST] Question 3 [LIST=1] [*]List six characteristics of an Electronic Mail (6 marks) [*]List and explain the three services provided by data link layer (6 marks) [/LIST] Question 4 [LIST=1] [*]Computer networks have been classified into three, list and describe briefly these three main classifications (9 marks) [*]The BRI line provides two types of ISDN communications channels. Name them [/LIST] (3 marks) Question 5 [LIST=1] [*]Define the term routing algorithm (2 marks) [*]Describe any four fundamental differences between non–adaptive and adaptive routing algorithm? (4 marks) [*]Describe any six functions of a MODEM (6 marks) [/LIST] Question 6 [LIST=1] [*]List four main tasks of the session layer (4 marks) [*]State five features of OSI Reference Model that distinguish it from TCP Reference Model [/LIST] (5 marks) [LIST=1] [*]Enumerate 3 different IEEE Standards for LAN configuration (3 marks) [/LIST] [/QUOTE]
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