An (analog) telephone call is “circuit based,” meaning that the system chooses a wire path from sender to receiver and that path or circuit is dedicated to the call until it is complete. What are two disadvantages of circuit switching?

What will be an ideal response?

Once a circuit is established, it is dedicated for theduration of the call. Although the route chosen may have been the best at the time the call began, a set of calls may usurp the limited resources between two points over time.

Finding an optimal circuit is a time-­?consuming task at call initiation because a full routing from source to destination has to be chosen.