How do the MAC address table and TCAM differ?

The MAC address table is populated by observing source MAC addresses of incoming frames, not from the ARP file, and TCAM can store more than just ARP-derived information.

The MAC address table primarily stores Layer 2 forwarding information (MAC-to-port mappings), not QoS information, whereas TCAM can indeed store QoS rules alongside other complex lookup data.

TCAM lookups are specifically designed to match 1s, 0s, and 'don't care' states (ternary matching), making them more flexible than simple binary MAC address lookups.

TCAM (Ternary Content Addressable Memory) is a type of hardware memory that allows for searching on three states (0, 1, or 'don't care'), making it suitable for complex access control lists, QoS policies, and other multi-field lookups. The MAC address table, in contrast, is a logical structure that stores MAC-to-port mappings for Layer 2 forwarding, typically residing in SRAM or dedicated memory blocks, not a distinct memory *type* with ternary search capabilities.