Question

Consider a packet-switched network based on a virtual circuit mode of switching. The delay jitter for the packets of a session from the source node to the destination node is/are

1. always Zero

2. non-zero

3. for some networks, zero

Select the correct answer using the code given below.
1. 1
2. 2 only 
3. 3 only
4. 2 and 3

Answer 1

Correct Answer - Option 1 : 1

Virtual Circuit switching:

• It is a packet switching method.
• In this method, before the data transfer begins in the form of packets, a dedicated path is established between the source and destination and path is called a virtual circuit.
• Due to virtual circuit, packets are always delivered in a specific order, so delay-jitter problems do not arise during pockets delivery and this is the advantage of using virtual circuit switching techniques.
• Virtual circuit switching is a connection-oriented technique.

So, based on the above points regarding the virtual circuit switching technique option (1) is the correct answer.

Important Points:

• Delay in a network means time taken by data to move from one point to another point.
• Jitter means the difference in delay between two packets.

Mainly four kinds of delay consider on network

1) Transmission delay

2) Propagation delay

3) Queuing delay

4) Processing delay