Briefly describe the H$\mathrm{.}323$ protocol.

options:

It represents an umbrella recommendation from the ITU that covers a variety of standards for audio, video, and data communications across circuit$-$switched networks.

It provides port$-$based authentication, requiring a wireless device to be authenticated prior to its gaining access to a LAN and its resources.

It defines the protocol required to establish and tear down communications, including voice and video calls flowing over a packet network.

It represents an umbrella recommendation from the ITU that covers a variety of standards for audio, video, and data communications across packet$-$based networks and, more specifically, IP$-$based networks.