Direct connection of two or more compatible control units is sometimes referred to as what type of communication?

• A. Peer-to-peer communication
• B. Client-server communication
• C. Broadcast communication
• D. Mesh communication

Answer: (A)

Direct, equal-status links between control units are described as peer-to-peer communication. In this setup, units talk directly to each other without a central coordinator or server, sharing status or alarm information as equals. That direct, two-way exchange among peers is what defines peer-to-peer.

Client-server involves a central server coordinating all requests, so devices don’t communicate solely with each other. Broadcast means sending a message to many devices at once, not just direct paired links. Mesh relies on multiple interconnected paths where messages can hop through several nodes, rather than a simple direct connection between peers.