1.3-3 Packet switching versus circuit switching (2).  Which of the characteristics below are associated with the technique of circuit switching? Select all correct answers. [Hint: more than one of the answers is correct].Multiple choice

A

Resources are used on demand, not reserved in advance.

B

Data may be queued before being transmitted due to other user's data that's also queueing for transmission.

C

Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) are two approaches for implementing this technique.

D

Congestion loss and variable end-end delays are possible with this technique.

E

This technique was the basis for the telephone call switching during the 20th century and into the beginning of this current century.

F

Reserves resources needed for a call from source to destination.

G

This technique is used in the Internet.

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