SK0-003 · Question #230
Which of the following connects the L2 cache to the processor?
The correct answer is C. Backside bus. The L2 cache is connected directly to the processor via a dedicated backside bus, which provides a high-speed, low-latency data path.
Question
Which of the following connects the L2 cache to the processor?
Options
- APCI
- BFrontside bus
- CBackside bus
- DSystem I/O bus
How the community answered
(41 responses)- A5% (2)
- C93% (38)
- D2% (1)
Why each option
The L2 cache is connected directly to the processor via a dedicated backside bus, which provides a high-speed, low-latency data path.
PCI is an expansion bus primarily used for connecting peripheral devices, not for direct, high-speed connection of internal CPU caches.
The frontside bus connects the CPU to the northbridge and main memory, but the L2 cache typically uses a more direct and faster connection to the CPU itself.
The backside bus is a high-speed, dedicated communication path that directly connects the L2 cache (and sometimes L3 cache) to the processor, enabling rapid data access and reducing latency compared to other system buses.
A system I/O bus is a general term for buses handling input/output operations, which is not the specific, high-speed connection for L2 cache.
Concept tested: CPU cache architecture and buses
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