Final answer:
Cluster peers in distributed systems like IPFS primarily communicate through the IPFS daemon, which is responsible for the networking aspects and data management within the system.
Step-by-step explanation:
Cluster peers in certain distributed systems, such as IPFS (InterPlanetary File System), communicate through a process known as the IPFS daemon. This daemon is responsible for handling the networking layer of IPFS, enabling peers within the cluster to communicate, manage data, and maintain the distributed file system. Communication is typically done using a libp2p network stack, which provides a variety of modules for different types of transport, peer discovery, protocol multiplexing, security, and more. The other options provided, such as HTTP requests, file transfers, and messaging services, might be part of the higher-level activities facilitated by the daemon but are not the primary communication endpoints themselves.