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.
Answer: E