$($a$)$ The Ethernet MAC sublayer has $2$ primary responsibilities which are data encapsulation and Media Access Control $($MAC$).$

$($i$)$ Describe the THREE $(3)$ primary functions of data encapsulation.

$($ii$)$ Discuss TWO $(2)$ primary functions of Media Access Control.

$($b$)$ Determine the correct sublayer for the following descriptions.

$\backslash$table$[[$Descriptions$,$MAC or LLC$?],[1.$ Controls the network interface card through software drivers,$],[\backslash$table$[[2.$ Works with the upper layers to add application information for$],[$delivery of data to higher level protocols$]],],[\backslash$table$[[3.$ Works with hardware to support bandwidth requirements and$],[$checks errors in the bits sent and received$]],],[\backslash$table$[[4.$ Controls access to the media through signaling and physical$],[$media standards requirements$]],],[5.$ Supports Ethernet technology by using CSMA$/$CD or CSMA$/$CA$,],[6.$ Remain relatively independent of physical equipment,$]]$

$($c$)$ Inspect the following MAC addresses; is this a proper MAC address? If no$,$ why?

$($i$)77$:$EE$:$33$:$AA$:$DD$

$($ii$)01-34-45-7$U$-8$B$-$P$9$

$($iii$)$ FI$00$:$5678\mathrm{.}910$C

$($d$)$ In Ethernet, different MAC addresses are used for unicast, multicast, and broadcast communications. Give relevant example of MAC addresses used in unicast, multicast, and broadcast delivery.

$($a$)$ List and describe TWO $(2)$ frame forwarding methods available on Cisco switches.