Mac Addresses — Cisco CCNA (200-301) Practice Questions

MAC addresses are 48-bit hardware identifiers burned into network interface cards and written in hexadecimal notation, used by Layer 2 devices to deliver frames within a local network segment. The CCNA exam tests your understanding of MAC address structure, including the organizationally unique identifier (OUI) in the first 24 bits and how Cisco switches learn MAC addresses by inspecting the source address of incoming frames. You must also know how switches handle unicast, multicast, and broadcast MAC addresses differently, and how the MAC address table ages out unused entries. MAC address concepts underpin switch forwarding behavior, port security, and ARP resolution, making them a prerequisite for many other switching topics on the exam.

Free questions on mac addresses