Consider a half$-$duplex point$-$to$-$point link using a stop$-$and$-$wait scheme, in which a series of messages is sent, with each message segmented into a number of frames. Ignore errors and frame overhead.

a$.$ Explain the effect on line utilization of increasing the message size so that fewer messages will be required? Other factors remain constant.

b$.$ Explain the effect on line utilization of increasing the number of frames for a constant message size?

c$.$ Explain the effect on line utilization of increasing frame size?

$[6$ Marks$]$

$($iv$)$ What is administrative distance in routing and what its values for static routes, RIPv$2$ and OSPF