Osmania University (OU) 2007 M.Sc Computer Science Computer Network and Internet Protocols - Question Paper

Faculty of Science
M.Sc II-Semester Examination, April/May 2007
COMPUTER SCIENCE
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Paper -- 2.3 (Computer Network and Internet Protocols)
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part -- A (Marks : eight X four = 32)
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1. Draw and discuss the components of a simplified communications model.
2. describe Service access points, protocol data units, confirmed service, unconfirmed service, sub networks.
3. Write a note on transmission impairments.
4. What is piggy backing? elaborate its advantages and disadvantages?
5. Write about: PANs, backend networks, and storage area networks.
6. Differentiate ranging from layer two and layer three switches.
7. How is flow based routing various from taditional/convential routing algorithm?
8. Write about wireless TCP.

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part -- B (Marks : four X 12 = 48)
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9. (a) Write a note on analog and digital data signals.
(b) Compare Twisted pair, coaxial cable, optical fiber.

(OR)
(c) Differentiate ranging from angle modulation, PM and FM.
(d) What is scrambling in the situation of digital-to-digital encoding techniques? An example as to what is biphase encoding.


10. (a) elaborate the various kinds of errors? Also explain at lowest 2 methods for fault detection correction.
(b) What is DCE and DTE? discuss their application in switched telephone work.

(OR)

(c) Draw and discuss the fields of HDLC frame format.
(d) discuss the fundamental operation of stop and wait protocol.

11. (a) discuss the CSMA/CD protocol.
(b) Write a note on fiber channel.

(OR)

(c) discuss the various routing algorithms used in bridge operations.
(d) discuss any 1 wireless LAN standard.

12. (a) By means of a neat sketch discuss the fields o IP datagram header.
(b) discuss how transport connections are recovered and handled after crashes.

(OR)

(c) discuss TCP transmission policy.
(d) discuss the different timer used in TCP.

Earning:   Approval pending.