Which of the Following Is True About Roll Call Polling

Multiple Choice

Which of the following is true about roll call polling?

A) It can not be modified to increase priority of clients or terminals.
B) It does not require a server or host or special device that performs the polling.
C) It is also called token passing.
D) It is a type of contention approach to media access control.
E) It typically involves some waiting because the server has to wait for a response from the polled client or terminal.