A MAC (Media Access Control) address is a hardware address assigned to a network interface card. It follows a 48-bit hexadecimal format usually displayed as six pairs separated by colons or hyphens:
* "MAC addresses typically appear as 00:50:09:2D:4D:94."
* 192.68.10.24 is an IPv4 address, fe80:102d:cd62:5434:82ae is an IPv6 address, and 0x3476 is simply a hexadecimal number, not a MAC address.
Reference: CompTIA ITF+ FC0-U71 Official Study Guide, Chapter 6 - Networking Concepts.