problem 1: What does data transparency signify? With the help of a flow chart, describe the procedure of bit de-stuffing at receiver’s end.

problem 2: Supposing classful addressing, find out the number of subnets and the number of hosts per subnet for the given blocks:

a) 122.45.77.32/20
b) A class B block having mask of 255.255.192.0

problem 3: prepare brief note on any four of the given:

a) The ATM reference model
b) HDLC
c) Salient difference between ISO-OSI and TCP/IP models.
d) Network Topologies and their utilizations.
e) Wireless networks.

problem 4:

a) Distinguish between static and dynamic channel allocation.
b) List out the major responsibilities of the network layer.
c) Give two illustrations of a collision-free protocol.
d) Why is the IP called best-effort delivery protocol?
e) What do you mean by transparent bridge?
f) What are the two sub layers of the data link layer termed as?
g) prepare the other names of IEEE 802.11 protocol or standard?
h) State baud rate of a standard 10 mbps Ethernet LAN?
i) State minimum data size of an Ethernet frame?

problem 5: Describe distance vector routing. What are its limits and how are they overcome?

problem 6: Describe pure-ALOHA and slotted-ALOHA systems. Give the expression for throughout for each, clearly describing the different terms.

problem 7: Describe 1-persistent, p-persistent and 0-persistent CSMA giving strong and weak points of all.

problem 8: Describe network equipment used in wired-LANS and describe the function of Hub, Switch and bridge.

problem 9: prepare brief note on any four of the given:

a) Token ring
b) Different fields in Ethernet frame format
c) Distinguish between congestion control and QoS (or Quality of service)
d) FDDI
e) Traffic shaping by using token bucket algorithm
f) CSMA/CD

problem 10: If the transmitted code word is 10011000 and the received code word is 11001001. Describe the error word? prepare transmitted code word, received code and error word as polynomials.