---

Solution

Given MAC address:

$4A:30:10:21:10:1A$

To identify whether a MAC address is unicast or multicast, we check the least significant bit of the first octet.

First octet is:

$4A$

Convert $4A$ into binary:

$4A=(01001010)_2$

The least significant bit is:

$0$

If the least significant bit of the first octet is $0$, it is a unicast address.

If it is $1$, it is a multicast address.

Broadcast address is:

$FF:FF:FF:FF:FF:FF$

The given address is not broadcast.

Therefore, the given address is a unicast address.