Suppose the round$-$trip propagation delay for Ethernet is $46\mathrm{.}4s.$

This yields a minimum packet size of $512$ bits $(464$ bits correspond$-$

ing to propagation delay $+48$ bits of jam signal$).$

$($a$)$ What happens to the minimum packet size if the delay time is

held constant and the signaling rate rises to $100Mbps?$

$($b$)$ What are the drawbacks to so large a minimum packet size?

$($c$)$ If compatibility were not an issue, how might the specifications

be written so as to permit a smaller minimum packet size?