Compare and contrast circuit switching and packet switching. Why did the Internet designers choose packet switching instead of circuit switching?

Question

What will be an ideal response?

Answer 1

With circuit switching, a call goes through a setup process whereby a temporary path, or cir
cuit, is created through various switching locations between the sender and receiver. The cir
cuit is dedicated to the call for the duration of the call. Even if no communication is occur
ring between the sender and receiver, the circuit and its resources remain reserved until one
end disconnects. If there's a problem with any device in the path during a call, the call is
dropped and must be reestablished. A new call requires a new setup process that creates a
new circuit.
With packet switching, there's no requirement for call setup. Messages are divided into small
blocks of data (packets) that can travel across many paths to the destination.
The early Internet designers chose packet switching because it provides better fault tolerance
and scalability. Packets are routed according to the best path available at the time and can be
routed around problem areas. Packets from different sources are intermixed, using all avail
able resources. The problem of underutilized idle circuits is eliminated, because resources are
used dynamically as packets arrive at switching locations.