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END TERM EXAMINATION
Paper Code: MCA-207
THIRD SEMESTER [MCA] DECEMBER 2013
Time: 3 Hours
Subject: Data Communication & Networking
Maximum Marks: 50
Note: Attempt five questions in all one from each unit, Q. No. 1 is
Q.1 a) Differentiate between half duplex and full duplex transmission mode.
b) Difference between port address, logical address and physical address
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c) Why do we need protocols. Which is the protocol of Internet
d) Explain Bluetooth technology.
e) How congestion can be prevented and removed
f) Compare and contrast PCM and DM.
g) Define subnetting and supernetting.
h) Explain DNS system.
i) Differentiate between error correction and detection
j) Compare and contrast PPP and HDLC.
Q.2 a) Categorize the four basic topologies in term of line configuration.
b) Explain Manchester and Differential Manchester scheme, Draw the graph using the
following data streams - 11111111, 00001 100, 01010101.
Explain the OSI model. How are OSI and ISO related to each other. Why TCP/IP protocol
suite became the dominant commercial architecture.
Q.4. a) How does single-bit error differ from burst error?.
b) What kind of error is undetectable by checksum.
c) Explain Go-Back-N ARQ Protocol.
Q.5 a) Define framing and why do we need it.
b) Explain CSMA with collision detection.
c) Define Slotted ALOHA.
Q.6 a) Define IPv4 and IPv6. Compare and contrast the fields in headers of IPv4 and IPV6. Give
the reason for elimination of checksum from IPV6 header.
b) Define Tunneling.
Q.7 a) Define ARP and RARP.
b) Give some adaptive and non-adaptive routing algorithms.
Q.8 a) Short note on (any 2)
b) Explain RSA algorithm.
Q.9 a) Which is a connectionless, unreliable protocol? Give some of its uses. Give its header
b) Explain Digital signature technique. What all services are provided by Digital Signatur
and which service is not present....
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