Biju Patnaik University of Technology 2008-7th Sem B.Tech (B Tech),ester computer network - Question Paper
B Tech seventh semester ques. paper of computer network.
wk*
Seventh Semester Examination - 2008 COMPUTER NETWORKS Full Marks-70
Time: 3 Hours
Answer Ol&S Hon No. 1 wftfcfc is compulsory and sny five from th& r&sL
IWL
The figures in ths right-hand margin indicate marks,
n. Answer the following questions : 2x10
(a) Find the number of bits that can be transmitted per second for a channel of 3000 Hz bandwidth with a signal to noise
ratio of 30 dB.
P. I
(b) How do the virtual circuit and datagram differ on the issue of routing and state information ?
(c) How congestion control differs from flow control ?
(d) What does QOS refer to and what is its goal ?
(e) What is the difference between cryptl-
2
graphy and cryptanalysis ?
(f) How is a repeater different from an amplifier?
(g) Do you think that layering is needed for protocol hierarchies ? If so, Why ?
BCSE 3306 2 Contd.
(h) What is the basic difference between a bridge and a router?
(i) What are the advantages one can obtain when a workstation is connected to a computer network ?
(j) State how connection less protocol differs from connection oriented protocol ?
(a) What is Frequency Division Multiplexing (FDM) ? Write few applications of using FDM. Describe the synchronous Time-Division Multiplexing (TDM) technique. 5
(b) Specify different media for transmission used in computer network. Explain in brief
CSE 3306 3 P-T.O.
about (he twisted pair and coaxial cable. Which one is better and why ? 5
3. (a) Describe the stop-and-wait ARO. What is
the difference between a Go-back-N ARQ and a Selective-repeat ARO. 5
{b) Specify different error detection and correction mechanisms, Explain*odd parity error correction scheme with an example. 5
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4. (a) Mention difference between Traditional
Ethernet and Fast Ethernet.Explain various components of Traditional Ethernet with a schematic diagram, 5
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(b) Explain the Shortest path Routing with a suitable example. 5
5. (a) Draw the schematic diagram of the
lPV4{intemet Protocol) Header. Explain in brief the function of each component. 5
(b) What is congestion ? Explain the principle and prevention policies of congestion control. 5
6, (a) Give an architectural overview of WWW
with brief explanations on web pages, browser, URL, 5
(b) What is Hamming distance ? What kind of error is undetectable by the checksum ?
(i) DNS-TTie Domain Name System (it) Simple Mail Transfer Protocol (SMTP)
Metropolitan Area Network (MAN).
Compare LAN with WAN with respect to
{iii) Network layer protocols.
their typical costs and typical speeds. 5
(b) Discuss the layer functionalities of the OS I reference model.
'I*
8. (a) Why message security is important in
communication ? Explain in brief the
Symmetric key encipherment in crypto
graphy, 8CSE 3306
5
Contd,
BCSE 3306
-C
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| Earning: Approval pending. |
