An L1 cache that does not connect directly to the bus cannot engage in a snoopy protocol.

Question

Quizplus · Accepted Answer

A snoopy protocol requires direct access to the system bus in order to monitor and handle cache coherence. A cache that is not connected directly to the bus, such as an L1 cache that is embedded in a processor core, cannot engage in a snoopy protocol. Instead, it typically uses a directory-based protocol to manage coherence with other caches in the system.

An L1 Cache That Does Not Connect Directly to the Bus