Design a mind map of this photo.....

Persistence Methods

What should a station do if the channel is busy?

What should a station do if the channel is idle?

Three methods have been devised to answer these questions:

the $1-$persistent method.

the nonpersistent method.

the p$-$persistent method.

Persistence Methods

Figure $12\mathrm{.}9$ Behavior of three persistence methods

Vulnerable Time

The vulnerable time for CSMA is the propagation time Tp$.$