Suppose two nodes, A and B$,$ are attached to opposite ends of a $200$ m cable. Assume the transmission rate is $10$Mbps$,$ and CSMA$/$CD with backoff intervals of multiples of $512$ bits is used $($backoff waiting time will be K$512$ bit times$).$ Assume that the signal propagation speed is $2$ x $10^8$ m$/$sec$.$

cable

A $---------------------$ B

$3)$ Finally, suppose that A and B have one frame of $600$ bits $($including all headers and preambles, etc.$)$ to send to each other and that both nodes initiate the transmission process at time t $=0.$ After the first collision, A draws $=0$ and B draws K $=1$ in the exponential backoff protocol $($assume a jam signal of $48$bits and an IFG of $96$bit times$).$ At what time $($in seconds$)$ is B$\text{'}$s retransmitted packet completely delivered at A$?$

Select one:

$2\mathrm{.}34$x$10^-4$

$1\mathrm{.}56$x$10^-4$

$6\mathrm{.}20$x$10^-6$

$1\mathrm{.}32$x$10^-4$

$3\mathrm{.}16$x$10^-5$

$2\mathrm{.}80$x$10^-4$

$1\mathrm{.}67$x$10^-4$

$1\mathrm{.}34$x$10^-4$

$2\mathrm{.}71$x$10^-5$

$5\mathrm{.}20$x$10^-4$

$1\mathrm{.}60$x$10^-4$

$8\mathrm{.}70$x$10^-5$

$3\mathrm{.}61$x$10^-5$

$8\mathrm{.}81$x$10^-5$