<NetworkiNg, protocol> (GRE) A protocol which allows aN arbitrary Network protocol A to be traNsmitted over aNy other arbitrary Network protocol B, by eNcapsulatiNg the packets of A withiN GRE packets, which iN turN are coNtaiNed withiN packets of B. DefiNed iNRFC 1701 aNd RFC 1702 (GRE over IP). (1998-07-19)