CompTIA Cloud+ Practice Test

Which process helps to reduce data transmission needs by keeping copies of recently sent data?

1. Latency

2. Compression

3. Caching

4. Bandwidth

The correct answer is: Caching

The process that helps to reduce data transmission needs by keeping copies of recently sent data is caching. Caching involves storing frequently accessed data temporarily in a location that allows for quicker retrieval than accessing the original source each time. By retaining copies of this data, systems can avoid repeated requests over the network, thus minimizing bandwidth usage and improving response times. When a user or application requests data that is already in the cache, the system can deliver that data instantly rather than retrieving it from a more distant storage location, which not only accelerates access but also conserves network resources. This is particularly effective in environments where the same data is often requested, such as web pages, images, or API responses. In contrast, latency refers to the delay before a transfer of data begins following an instruction for its transfer. Compression involves reducing the size of data to decrease transmission time but does not specifically keep copies of data. Bandwidth measures the maximum rate of data transfer across a network but does not pertain to the retention of previously sent data. Therefore, caching is the correct answer as it directly involves the storage of data for efficient reuse.