Routers with an external power supply

 

— theoretically, the external placement of the power supply requires additional space, and therefore is not as convenient as the internal one. In practice, most blocks of this type are quite compact in size and are equipped with “plugs” for sockets right on the case - in other words, the block is installed on a socket, and from there the wire stretches to the router. And the lack of power circuits and transformers inside the routers has a positive effect on their compactness. Due to all this, this option is very popular among desktop models (see "Form factor"), primarily entry-level and mid-level.