amp amp amp Support for Advanced Message Processing XEP-0079: Advanced Message Processing compress compress compression Support for Stream Compression XEP-0138: Stream Compression iq-auth iq-auth auth Support for Non-SASL Authentication XEP-0078: Non-SASL Authentication iq-register iq-register register Support for In-Band Registration XEP-0077: In-Band Registration bind bind bind Support for Resource Binding RFC 3920: XMPP Core mechanisms mechanisms mechanisms Support for Simple Authentication and Security Layer (SASL) RFC 3920: XMPP Core session session session Support for IM Session Establishment RFC 3921: XMPP IM starttls starttls starttls Support for Transport Layer Security (TLS) RFC 3920: XMPP Core dialback dialback dialback Support for Server Dialback XEP-0192 (rfc3920bis when published)