Q$7.$ a$)$ Define IEEE $802\mathrm{.}16$ standard and outline the primary goal of the standard.

b$)$ How does IEEE $802\mathrm{.}16$ support Quality of Service $($QoS$)$ and does it contribute to bridging the digital divide?

c$)$ What are the key advantages of WiMAX technology and how does the WiMAX differ from Wi$-$Fi$?$

d$)$ What are the frequency bands used by IEEE $802\mathrm{.}16$ for communication and What is the typical range of IEEE $802\mathrm{.}16$ networks?

Q$8.$ a$)$ Define Reservation$-$Based Multiple Access and briefly explain how it works.

b$)$ Briefly explain the primary advantage of reservation$-$based access over contention$-$based access.

c$)$ Briefly explain how Reservation$-$Based Multiple Access contribute to Quality of Service $($QoS$)$ in wireless networks?

d$)$ What challenges are associated with Reservation$-$Based Multiple Access and Can Reservation$-$Based Multiple Access be applied in ad$-$hoc or decentralized networks?