1) Explain LAN , WAN, MAN , Wireless Networks and Internetworks.
2) Explain the seven layer OSI reference model giving functionality of each layer
3) Give the principal differences between connection oriented communication and connectionless communication.
4) Explain SMDS and how it is better alternative to high speed leased lines
5) State Shannon’s theorem for Maximum channel capacity. Given a channel with maximum channel capacity of 20Mbps. The bandwidth of the channel is 3Mhz. What is the signal to noise ration of the channel.
6) Compare Twisted pair, Coaxial cable and Fiber optic cable.
7) Explain FDM, TDM, SDM.
8) Given a 10 bit sequence 1010011110 and a divisor 1011.Fnd CRC.
9) Given a remainder 111, and a data unit 10110011 and a divisor 1011, is there any error in the data unit.
10) Give the difference between character stuffing and bit stuffing using appropriate example.
11) What is switching? Why it is required? Differentiate between Circuit Switching and Packet Switching.
12) Answer the following in short
a) Explain 1-persistent CSMA/CD
b) Why switched LAN is better?
c) Slotted ALOHA offer high efficiency then PURE ALOHA? Why and by what percentage.
d) Why 10Mbps Ethernet is restricted to length of 2.5 KM?
e) What are the function of NIC card?
13) Compare OSI reference model and TCP/IP model
14) What is communication subnet? List various advantages and disadvantages of following topology.
a) Complete
b) Star
c) Bus
15) Draw and explain 802.3 Ethernet frame format and also binary back off algorithm.
16) Discuss Channel Allocation problem in computer networking.
17) Design a computer network of an upcoming engineering organization . Write specification of components used in the network. Assume necessary data.
