正解:C
The MAC address table, also known as the CAM (Content Addressable Memory) table, is used by switches to store MAC addresses along with their corresponding port numbers. When a frame arrives at a switch, the switch looks up the destination MAC address in the CAM table to determine the outgoing port. CAM supports exact match lookups, meaning it can quickly find an entry that exactly matches the search query.
TCAM (Ternary Content Addressable Memory), on the other hand, is used for more complex lookups that require matching multiple fields, such as those needed for routing prefix lookups, ACL (Access Control Lists), and QoS (Quality of Service) policies. TCAM allows for both exact and partial (ternary) matches, which is useful for situations where wildcard or mask entries are involved.
"https://community.cisco.com/t5/networking-documents/cam-content-addressable-memory-vs-tcam-ternary-cont