Routers that can send Internet signals over two distinct frequencies are called _____ routers.

Routers that can send Internet signals over two distinct frequencies are referred to as dual-band routers. These devices utilize both the 2.4 GHz and 5 GHz frequency bands to improve wireless communication. The 2.4 GHz band offers greater range and is better at penetrating walls, making it ideal for general use, while the 5 GHz band supports higher data rates and is less prone to interference, providing a faster connection for devices located closer to the router. This dual-band capability allows users to experience improved network performance by efficiently managing how devices connect based on their needs and capabilities.

In comparison, multi-band routers support multiple frequency bands beyond just two, such as a tri-band router, which includes three frequency bands (two 5 GHz and one 2.4 GHz). Single-band routers, on the other hand, only operate on one frequency band, limiting their performance and flexibility. Thus, the term "dual-band" specifically identifies routers that operate on the two frequency bands, making this the correct and most appropriate choice.