The figure shows the physical path that data takes down a sending end system$$s protocol stack, up and down the protocol stacks of an intervening link$-$layer switch. Using the figure answer the following:

i$)$ Identify and name the network access devices. $[2$ marks$]$

ii$)$ Do these network devices implement the same layers of protocol stack? $[1$ mark$]$

iii$)$ Explain the stepwise process of de$-$encapsulation at the destination. $[3$ marks$]$

$2$