$($a$)$ Consider using Optical Burst Switching $($OBS$)$ networks with Just$-$EnoughTime signaling protocol. Complete the below signaling figure.

$($b$)$ Repeat $($a$)$ while considering Just$-$In$-$Time signaling protocol.

$($c$)$ From both $($a$)$ and $($b$),$ which protocol you would be using?

$($d$)$ If you are to use Optical Packet Switching, what would be the main challenge that you would encounter?

$($e$)$ What would be the challenge of using today's wavelength routed networks?