Briefly explain the services provided by the data link layer.

$($ii$)$ Identify the two sub$-$layers of the data link layer and state function of each in data transmission.

$($iii$)$ Given the MAC address of a computer as $8$c:$85$:$90$:ca:cf:$46,$ Identify the organisational Unique identifier $($OUI$)$ and the Network Interface Card Specific Number.

$($iv$)$ Why is an ARP query sent within a broadcast frame? Why is an ARP response sent within a frame with a specific destination MAC address?

The following figure is a wireshark packet capture of an ARP. Explain each field of the packet.

$($v$)$ Distinguish between Single bit and Burst Error and state any four methods used to detect transmission errors.

$($vi$)$ What is humming distance and what role does it play in data transmission.

$($vii$)$ Given a data coding scheme with the dataword and the corresponding codewords as shown the table below. Determine the maximum number of bits error the scheme can detect.

$($viii$)$ A category of error detecting $($and correcting$)$ code, called the Hamming code, is a code in which dmin $=3.$ This code can detect up to two errors $($or correct one single error$).$ In this code, the values of n$,$ k$,$ and r are related as: n $=2$r $-1$ and k $=$ n $-$ r$.$ Find the number of bits in the dataword and the codewords if r is $3.$