Which two protocols permit collection information over user's availability status? (Choose two.)

SIMPLE (SIP for Instant Messaging and Presence Leveraging Extensions) extends SIP with SUBSCRIBE and NOTIFY methods specifically for collecting and distributing presence and availability information.

XMPP (Extensible Messaging and Presence Protocol) was designed from the ground up with presence as a core feature, using directed presence stanzas to track and distribute user availability status in real time.

LDAP is a directory access protocol used to query and modify directory entries; it has no built-in mechanism to publish or subscribe to real-time availability status.

SOAP is an XML-based messaging protocol for web services communication; it does not define any presence or availability subscription model.