a$.$ In reference to pure ALOHA, discuss Acknowledgement, Timeout and Maximum number of retransmission while giving its flow diagram

$4$ Mks

$2$ Mks

b$.$ How does SLOTTED ALOHA differ from pure ALOHA, discuss

c$.$

i$.$ What is THROUGHPUT and discuss the throughput of slotted ALOHA

$4$ Mks

ii$.$ A slotted ALOHA network transmit $250-$bits frames using a shared channel with a $200-$kbps bandwidth. Find the throughput if the system $($all stations together$)$ produces

$1000$ frames per second

$250$ frames per second

$2$ Mks

$2$ Mks

a$.$ Discuss the SELECT function in the polling Protocol

$5$ Mks

b$.$ Write a short note on the Network Allocation Vector $($NAV$)$ under the CSMA$/$CA

$4$ Mks

c$.$ Using appropriate diagram, discuss the RESERVATION under the Media Access Control

$5$ Mks