FACULTY OF INFORMATICS B.E. 3/4 (IT) II – Semester (New) (Main) Examination, April / May 2013 Subject : Computer Networks Time : 3 hours
Max. Marks : 75
Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B. PART – A (25 Marks) 1. What is a computer network? Give an example.
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2. Distinguish between connection-oriented and connection-less service.
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3. List and give the range of various IP address classes.
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4. List the protocols used by RIP and OSPF.
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5. What are the applications of UDP?
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6. What is a proxy server?
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7. What is a reserved port? How a reserved port can be assigned to an application?
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8. What is LDAP?
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9. Give the format of DNS resource record.
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10. What is the difference between private key and public key algorithms?
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PART – B (50 Marks) 11. Discuss about any two routing algorithm with suitable examples. 12.a) Distinguish between virtual circuits and datagram subnets. b) Explain the header format of IP packet with a neat diagram. 13. What is congestion? Discuss about the congestion control methods used in datagram subnets. 14.a) Discuss about the steps performed by the internet super server. b) List and explain any two advanced socket system calls. 15.a) What are the functions of an email system? b) Compare between POP3 and IMAP.
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16. What is IPsec? Discuss about the modes of IPsec.
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