Unicast
lastmod 2026-11-10created 2017-05-122 edits
Unicast is a one-to-one communication method in which a single sender delivers data to only a single receiver on a network. It is the most basic form of transmission on the Internet, and most traffic exchanged with a single host that has a specific address, such as web requests or SSH connections, falls into this category. It is a routing scheme contrasted with broadcast, which spreads the same data across the entire network; multicast, which sends only to subscribed groups; and anycast, which sends to the nearest one among multiple candidates.