Subject Code—4160
M. Sc. (CS) / M.C.A. EXAMINATION
(MCA 3 Years)
(Main)
(Fourth Semester)
MS-16
COMPUTER NETWORK
Time : 3 Hours
Marks: 70
Maximum
Note : Attempt any Five Questions. All Questions carry equal
marks.
1.
Explain physical layer of OSI reference model along with
Nyquist theorem. Also explain different transmission
medias used for data communication along their
characteristics.
2.
Give reasons for using layered approach in defining
protocols for networking. Also explain TCP/IP reference
model along with its comparison to ATM reference model.
3.
Differentiate between the following:
(a)
Half and Full Duplex
(b)
TDMA and FDMA
(c)
HDLC and SDLC
4.
What is purpose of transport layer? Explain how
connection management and flow control is done in TCP.
5.
What is difference between ISDN and B-ISDN ? Also
explain layered protocol architecture and frame format of
ISDN.
6.
Explain different types of framing and error detection
techniques at data link layer level of ODI reference model.
7.
Compare multiple access techniques of Ethernet, token bus
and token ring IEEE LAN standards.
8.
Write short notes on the following:
(a)
X.25
(b)
ATM