Internet Architecture Protocol BS IT 4th Term Past Paper 2016 UOS

University of Sargodha

BS 4th Term Examination 2016
Subject: I.T
Paper: Internet Architecture & Protocol (IT:3513)
Time Allowed: 2:30 Hours
Maximum Marks: 80

Objective Part (Compulsory)

Q.1. Write short answers of the following in 2-3 lines each on your answer sheet. (2*16)
i. When more security is required: which authentication will be used?
ii. What is the size of mandatory and optional header in IP datagram?
iii. What maximum size packets have at network layer?
iv. Which protocol ensures the proper delays in communication?
v. What is the difference between switched and point to point WAN?
vi. Find the first address in the block if one of the addresses is 140.120.84.24/20.
vii. Give any three application layer protocols.
viii. How congestion is controlled in TCP?
ix. Give Network layer devices.
x. Router is uni-casting device by default. Is this true or false?
xi. Why address aggregation is used?
xii. Which address field is changed in packet travelling through a datagram network?
xiii. What is half close in connectivity?
xiv. What is cell in ATM networks?
xv. What is the difference between local and global DLCI?

Subjective Part (3*16)

Q.2. a) Explain the Frame format of HDLC.
b) How IPv4 can be transformed to IPv6?

Q.3. Explain the various attributes present in TCP header.

Q.4. a) What are the different routing protocols at network layer?
b) What different functions are performed by LCP?

Q.5. a) Give the advantages and applications of UDP.
b) How error and flow control is performed by protocols?

Q.6. An organization is granted a block of addresses with the beginning address 14.24.74.0/24. The organization needs to have 11 subnets as shown below:
a. two subnets, each with 64 addresses.
b. two subnets, each with 32 addresses.
c. two subnets, each with 16 addresses.
d. four subnets, each with 4 addresses.
Design the subnets.