What are the three network domains?

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The question tests how Navy networks are categorized by the different ways data travels. The three network domains are the main transport mediums used to deliver connectivity across the fleet and bases: radio frequency communications, satellite communications, and terrestrial network infrastructure.

Radio frequency communications cover wireless links using radio waves, including shipboard radios, point-to-point wireless, and other line-of-sight or microwave links. This domain gives mobility and reach where cabling isn’t practical, but bandwidth can be more limited and performance can be affected by terrain or weather.

Satellite communications extend reach globally by routing signals through space via satellites. This domain is essential for long-distance, worldwide connectivity, enabling ships and personnel deployed anywhere to communicate with command centers and partner networks, though it can introduce higher latency and reliance on satellite availability.

Terrestrial network infrastructure encompasses the wired backbone—fiber and copper networks, data centers, routers, switches, and the grounded networks on bases and ships when cable connectivity is used. This domain provides high-capacity, reliable, high-speed networks for local and wide-area communications and supports standard internet-era services.

The other options describe organizational functions and groups, not the networks’ transport media.