Punjab Technical University 2009-6th Sem B.Tech Computer Science and Engineering , B Tech, CSE,ester, ATM, - - Question Paper

Instruction to Candidates:
1) part - A is Compulsory.
2) Attempt any 4 ques. from part - B.
3) Attempt any 2 ques. from part - C.

part - A
Q 1) [2 marks each]
a) Why the packets of ATM are of fixed length?
b) What is the significance of Asynchronous Transfer Mode?
c) What is the requirement of an ATM cable?
d) What do you mean by virtual circuit identifier?
e) What is explicit forward congestion indication?
f) What is the importance of Header fault Check byte?
g) What is segmentationa nd reassembly in AIM?
h) ATM is packet switched or circuit switched technology?
i) How many generic flow control bits are there in ATM payload? What
is their function.
j) What is Encapsulation in ATM?

part - B [5 marks each]

Q 2) define the design problems for the option of the payload size in ATM.

Q 3) elaborate various kinds of switch models? Compare them.

Q 4) How ATM layer performance is measured?

Q S) elaborate the necessary components for setting the AIM hardware?

Q 6) What is Conjunction Control? Explain?

part - C [10 marks each]

Q 7) What percentage of an ATM link's total bandwidth is consumed by the
ATM cell headers? What percentage of the total bandwidth is consumed by
all nonpayload bits in AAL3/4 andAAL5, when the user data is 512 bytes
long?

Q 8) How reliable does an ATM connection have to be in order to maintain a loss
rate of less than 1 per million for a higher-level PDU of size 20 cells?
presume AAL5.
Q 9) Write short notes on the following:
(a) ATM System design.
(b) option of Payload size

Earning:   Approval pending.