Which of the following is a common protocol used in Avaya Aura solutions?

SIP, or Session Initiation Protocol, is a foundational element of Avaya Aura solutions, particularly in managing voice and video communications. It is specifically designed for establishing, modifying, and terminating real-time sessions involving multimedia such as voice calls, video calls, and messaging. In the context of Avaya systems, SIP is integral for enabling features like call setup and signaling, which are essential for telecommunications applications.

SIP’s adoption in Avaya products allows for seamless integration of communication services, enabling functionalities such as presence information, conference calling, and the ability to handle multiple sessions simultaneously. This capacity to manage real-time communicative interactions facilitates a robust and efficient operational environment within Avaya’s suite of tools.

The other options, while they serve crucial roles in networking and communications, do not align with the primary functionalities of Avaya Aura systems to the extent that SIP does. HTTP is primarily for web communication, FTP is for file transfers, and SMTP focuses on email transmission, none of which are designed for real-time session management like SIP. Thus, SIP stands out as the most common and relevant protocol used within Avaya Aura solutions.