Final answer:
Packet switching characteristics include resources used on demand, potential queuing of data, possible congestion loss and variable delays, and this technique's use in the Internet. Circuit switching differs by reserving resources for a call and typically uses FDM and TDM.
Step-by-step explanation:
The characteristics associated with the technique of packet switching include:
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.
In contrast, circuit switching, which was used for traditional telephone call switching during the 20th century and into the beginning of the 21st century, reserves resources for a call from source to destination, and often employs approaches such as Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM).