Final answer:
Byte-range fetches are a feature of the S3 protocol that allows clients to retrieve specific portions of an object. Clients can request a specific range of bytes from the object, reducing data transfer and improving performance.
Step-by-step explanation:
Byte-range fetches are a feature of the S3 protocol that allows clients to retrieve specific portions of an object. When a client requests a byte-range fetch, it specifies the range of bytes it wants to retrieve from the object. The server then responds with only the requested bytes, reducing the amount of data transferred and improving performance.