Data Link Switching DLSw <networking> (DLSw) A standard for transporting {IBM} {Systems Network Architecture} (SNA) and {network basic input/output system} (NetBIOS) traffic over an {Internet protocol} network. Initially, in 1992, DLSw was proprietary to IBM. It was submitted to the {IETF} as {RFC 1434} in 1993, later updated by {RFC 1795}. (http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dlsw.htm). (2008-01-11)