Medium Access Control: IEEE $802\mathrm{.}11$

a$.$In the IEEE $802\mathrm{.}11$ wireless networking standard, the Request to

Send $($RTS$)$ packet includes a field that specifies the duration of time needed

to complete the proposed data transmission. This mechanism is part of a

technique known as Virtual Carrier Sensing. Describe one potential

drawback or limitation of using this approach for managing wireless

communication.

b$.$Aside from the shortcoming identified in part $($a$),$ explain why

Virtual Carrier Sensing can sometimes negatively impact network

performance. Explain one such scenario to illustrate this impact.

Don't give me long answers. Keep it moderate and accurate.

Please mention the references where required.