Which SIP Methods are supported on the Access side of the network when using WebEx Calling?

The correct choice indicates that multiple SIP methods—including INVITE, ACK, CANCEL, BYE, OPTIONS, and UPDATE—are supported on the access side of the network in the context of WebEx Calling. This selection is comprehensive and reflects the typical operations needed to establish and manage sessions in a SIP-based communication system.

INVITE is essential for initiating a session between users, while BYE is utilized to terminate that session. The ACK method is used to confirm receipt of a final response to an INVITE request, ensuring that the parties are synchronized. CANCEL serves to abort a pending request, which can be crucial in managing call scenarios efficiently. OPTIONS is often employed to query the capabilities of other SIP entities, and UPDATE allows changes to an existing session without renegotiating the entire call setup.

Recognizing the significance of these methods underlines the complexity and robustness of WebEx Calling, as it leverages SIP as a protocol to enable effective communication. This choice showcases the range of functionalities required to facilitate diverse communication needs, which is crucial for ensuring that the service is reliable and responsive to user actions.

Other options might imply a more limited set of methods, failing to capture the complete spectrum necessary for robust SIP functionality in WebEx Calling. Thus, the selected