connectionless

adj. not connected, not on-line, not linked

In a packet-switched network, connectionless mode transmission is a transmission in which each packet is prepended with a header containing a destination address sufficient to permit the independent delivery of the packet without the aid of additional instructions. A packet transmitted in a connectionless mode is frequently called a datagram. In connection-oriented communication the stations about to exchange data first need to declare towards each other that they want to do so. This is called "establishing a connection". A connection is sometimes defined as a logical relationship between the peers exchanging data.
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