What does IP define in terms of network communication?

The correct choice relates to the fundamental role that IP, or Internet Protocol, plays in network communication. IP is responsible for defining the addressing methods necessary for packet delivery across a network. This includes assigning unique addresses to devices on a network, which ensures that data packets are sent to and received from the correct destinations. Each device on a network must have a unique IP address to facilitate proper communication, as this address acts like a mailing address for data packets.

In the context of networking, the function of IP goes beyond just addressing; it also encompasses routing, which involves determining the optimal path for data packets to reach their destination. This is crucial for maintaining effective communication in both local and wide-area networks.

The other options focus on different aspects of audio-visual technology. Audio formats pertain to the type of audio data being transmitted, while video resolutions refer to the clarity and detail of video images. Compression techniques relate to how data is reduced in size for storage or transmission, but they are not central to the core function of IP in network communication.