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arjunh

Additionally, circuit switching is more robust/reliable than packet switching, since you have a circuit dedicated to the session (for transmitting the data). With packet switching, you need to have mechanisms to check that all the packets are received successfully (no lost/malformed packets).

That being said, packet switching has quickly become much more common in today's communication networks, since it allows for different messages to make progress over the network (better provisions for fairness).

bxb

The cons I see with circuit switching is that the overhead for setting up/tearing down the route can be high, and it results in low utilization because only one connection exists per route. The con with packet switching is there has to be a defined protocol for maintaining the integrity of packets. The logic for dynamically switching links during transmission can also be complex.