Learn in the textbookConnecting Devices That Make Up a Network
DefinitionA proxy (プロキシ), or proxy server, is a server that connects to outside web servers on behalf of devices inside an office or similar network and relays the exchange.
ExplanationBecause all of the office's web traffic passes through one point, the proxy can log browsing and block connections to inappropriate sites. Outside web servers see the proxy as the party connecting, so internal devices' addresses are harder to see. It can also store pages it has already fetched and reuse them for later requests to speed up responses, which is called a cache (キャッシュ).
AnalogyIt is like a purchasing clerk who shops at outside stores for the staff. The store sees only the clerk and has a hard time telling who placed the order.
Memory hookA proxy is a stand-in, the same word as in a proxy vote.