connection +"Ž -less
connectionless - Computer Definition
In packet data transmission, a mode in which there is no call setup phase before transmission begins, no predetermined path set up for frames or packets to travel through a network, and no call teardown phase after transmission ceases.As each packet header contains enough information to enable its independent delivery without the aid of any additional instructions, each packet can take an entirely different route from originating host to destination host. In X.25 networks, for example, datagram service is connectionless. Local area networks (LANs) are connectionless. Internet Protocol (IP) is a connectionless datagram service. See also always on, connection-oriented, datagram service, frame, LAN, packet, and X.25.
A communications architecture that does not require the establishment of a session between two nodes before transmission can begin. For example, the transmission of frames within a local area network (LAN), such as Ethernet, Token Ring and FDDI, is connectionless. As soon as a frame has been constructed, it is inserted into the network (put on the wire). In an IP network, the UDP transport protocol, which is used for voice over IP (VoIP) and video calling, is connectionless. Contrast with connection oriented. See UDP.