…ling, and the potential utility of native support for broadcast and multicast [ RFC3819 ]. Tunnels have some advantages over native links, being potentially easier to reconfigure and control because they can Touch, Townsley Expires March 12, 2020 [Page 5] Internet-Draft Tunnels i…

…ned to detect physical-layer errors or malicious modification of the datagram [ RFC3819 ]. Application developers SHOULD implement additional checks where data integrity is important, e.g., through a Cyclic Redundancy Check (CRC) or keyed or non-keyed cryptographic hash included …