Learn in the textbookFundamentals of Processing Types and System Configuration
DefinitionPeer-to-peer (ピアツーピア) is a configuration with no dedicated server, in which devices on a network exchange data directly as equals.
ExplanationEach device can act both as the one receiving a service and as the one providing it. Load does not pile up on any particular server, but because management is split across the devices, the whole network is hard to manage as one.
AnalogyIt is like a book club where members lend and borrow books hand to hand. There is no central desk like a library's, and everyone can be both lender and borrower.
Memory hookA peer is an equal or a companion. Read the name as peer linking directly to peer.