The value of tmnxTwampSrvCapabilities indicates the set of standard TWAMP protocol options supported by the TWAMP server. This value is sent by the TWAMP server in the Mode field of the RFC 4656 Server Greeting PDU. This value is constant for a particular SROS release. It changes when support for a new standard protocol option is coded into the SROS TWAMP server. Code points: unauthenticated (0) - RFC 4656 Unauthenticated mode authenticated (1) - RFC 4656 Authenticated mode encrypted (2) - RFC 4656 Encrypted mode unauthTestEncryptControl (3) - RFC 5618 Mixed Security mode individualSessionControl (4) - RFC 5938 Individual Session Control option reflectOctets (5) - RFC 6038 Reflect Octets option symmetricalSizeSenderTestPkt(6) - RFC 6038 Symmetrical Test Packet Size option ikeV2DerivedMode (7) - IETF draft-ietf-ippm-ipsec-11 IKEv2-Derived Shared Secret Key option dscpAndEcnMonitoring (8), - IETF draft-ietf-ippm-type-p-monitor-03 Differentiated Service Code Point and Explicit Congestion Notification Monitoring option