Which of the characteristics below are associated with the technique of packet switching? Select all correct answers. $[$Hint: more than one of the answers is correct$].$

Group of answer choices

Reserves resources needed for a call from source to destination.

Resources are used on demand, not reserved in advance.

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

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

This technique is used in the Internet.

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