A $1,500-$byte block of data is transmitted between two computers using Idle Repeat

Request $($RQ$)$ protocol over three different links: Link$1$ a $10-$km of coaxial cable at a

transmission rate of $1$ Mb$/$s; Link$2$ a $200-$km leased line at a transmission rate of $5$ Mb$/$s;

Link$3$ a $30,000-$km free space satellite link at a transmission rate of $10$ Mb$/$s$.$

$($i$)$ Determine the transmission delay for each link, i$.$e$.$ the time taken by the

computer$$s transmitter to upload the frame onto each link.

$($ii$)$ Determine the propagation delay, i$.$e$.$ the minimum time required for the

transmitting computer to receive the transmission acknowledgement $($ACK or

NAK$)$ for each communication link. Assume that the velocity of propagation of the

signal in Links $1$ and $2$ is $2105$ km$/$s$,$ and in Link$3$ it is $3105$ km$/$s$.$

$($iii$)$ Find out which of the effects, the transmission delay, the propagation delay, or

both, determine the total round$-$trip delay associated with each link, and thus

explain and conclude for which link the Idle RQ protocol is suitable and for which

it is not.