Caching is best described as which concept?

Caching is best described as which concept?

• A. A method of encrypting data at rest.
• B. A technique for distributing content across multiple servers.
• C. A high-speed data storage layer that stores a subset of data for future requests.
• D. A type of persistent memory module.

Answer: (C)

Caching is the practice of keeping frequently accessed data in a fast, temporary storage layer so that future requests can be served quickly without going to the slower primary data store. This is best described as a high-speed data storage layer that stores a subset of data for future requests, enabling fast retrieval when the data is requested again. Caches sit between clients and the main storage and work by returning data quickly when it’s already in the cache (a cache hit) and, if not, fetching it from the main store and updating the cache (a cache miss). This approach reduces latency and lightens the load on the primary storage. The other options don’t capture the caching idea: encryption at rest protects data, content distribution across multiple servers describes content delivery networks, and a persistent memory module is a hardware memory type, not caching.

Caching is the practice of keeping frequently accessed data in a fast, temporary storage layer so that future requests can be served quickly without going to the slower primary data store. This is best described as a high-speed data storage layer that stores a subset of data for future requests, enabling fast retrieval when the data is requested again. Caches sit between clients and the main storage and work by returning data quickly when it’s already in the cache (a cache hit) and, if not, fetching it from the main store and updating the cache (a cache miss). This approach reduces latency and lightens the load on the primary storage. The other options don’t capture the caching idea: encryption at rest protects data, content distribution across multiple servers describes content delivery networks, and a persistent memory module is a hardware memory type, not caching.