BSc IT Sem VI 2016 17 2016-17 Data Communication Networking Security Question Paper - Mumbai University | munotes

Questions asked in this paper

• Figures to the right indicate

1. Q4 Mixing of sub-questions is not allowed Attempt the following (any THREE):
   • (A) Change the following IPv4 ad v4 addresses from dotted-decimal notation to binary notation.
   • (B) A block of addresses is granted to a small organization. We know that one of the addresses is 205.16.37.39/28. Find the following e address in the block, Total number of address
   • (C) Discuss the working of Dynamic Host Configuration Protocol
   • (D) What are routing protocols? Explain distance vector routing with an example
   • (E) How Bootstrap Protocol ( BOOTP ) will work, and server are on different network
   • (F) Discuss direct and indirect delivery with an
2. Q2 Attempt the following (any THREE): o 15 marks
   • (A) Give on important differentiation point between TCP
   • (B) Explain example; Connection establishment.using three-way handshaking
   • (C) Write a short.note.on.Backpressure method for-alleviating congestion
   • (D) Define Quality of Service. different flow characteristics
   • (E) What is domain name space? Discuss hierarchy of name-space with an example
   • (F) can file using with an example
3. Q3 attempt the following (any THREE): List and explain three key objective of computer security “What is security attack? Define and active attacks. Explain active attack with in brief any five types of malicious.software Distributed Denial of Discuss DDoS attack description discuss characteristics and limitations of firewall ribe different of Packet Filtering Firewall “Attempt the following (any THREE): (15) Discuss of symmetric key cipher for encryption and decryption Explain:with an example additive cipher and multiplicative cipher general-structure of DES in detail Asymmetric key.cryptography works during encryption and decryption of plaintext Define pigeonhole principle. Explain the birthday problem How Privacy (PGP) Protocol works with e-mail to provide privacy, integrity and 15 marks
4. Q5 Attempt the following (any THREE): i i in the followi and give a reason for
   • (A) Find the error, if any, in the following IPv4 addresses g
   • B) Write format of an electronic mail with an example iscuss the remote logging facility of le et. LY
   • (D) Write a short note on demilitarized zone (DMZ)
   • (E) Define intruder. List and discuss different classes
   • (F) Write a short note on IPSec at aw he AQ

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