Permanent virtual circuit and Switched virtual circuit

Question

What is meant by Permanent virtual circuit and Switched virtual circuit?

Answer 1

Permanent virtual circuits are comparable to the leased lines within circuit switching. In this approach, the same virtual circuit is given between the two uses on the continuous basis. The circuit is dedicated to the particular uses.

Switched virtual circuit format is comparable conceptually to the dial-up line in the circuit switching. In this method, a virtual circuit is formed whenever it is required and exits only for the duration of the specific exchange.