2.6 Versioning, Capability Negotiation, and Extensibility

No capability negotiation is associated with Authentication Services. Any deviations from a specific version's implementation of these protocol specifications are documented in the respective protocol document. Capability negotiations between client and server implementations of these protocols are specified in the System Versioning and Capability Negotiation sections in their respective technical documents. For more details, see sections 1.7 of the member protocol specifications that are listed in section 2.2.