Data Communication and Computer Networks- Question Bank

Data Communication and Computer Networks

June 2018

Q1 Explain the DES algorithm with the help of  a suitable example.

Q2 What is the need of hierarchical routing? Explain it with an example.

Q3 Explain Leaky Bucket and Token Bucket traffic shaping mechanisms and compare them.

Q4 A high quality audio signal is limited to 10 kHz. It is to be transmitted using a 7 -bit code. Calculate the required bit rate which needs to be supported by the channel.

Q5 Enlist any two core protocols of Internet layer in TCP/IP reference model. Describe the functionality of these two protocols.

Q6 Explain the concepts of Local Procedure Call(LPC) and Remote Procedure Call (RPC) using suitable examples and diagrams. Why is RPC useful in programming?

Q7 State the need of broadcast routing. Discuss various broadcast routing procedures. Give an example of multicast routing.

Q8 A system uses Slotted ALOHA protocol. In a observation interval, the channel is busy 90% of the time. Calculate the system throughput.

Q9 Explain connection establishment and connection termination process in TCP using  three-way handshaking mechanism.

Q10 Why is Stop-and -Wait protocol inefficient for satellite links? How is this inefficiency overcome in Sliding Window protocol? Explain.

Q11 Explain the collision occurrences in Ethernet. How is back-off algorithm implemented in Ethernet?

Q12 Illustrate Count-to-Infinity problem. How can it be resolved?

Q13 Explain the functionalities of SSL. Discuss the merits of SSL.