USB - RJ45 Cisco Console Cable, Rollover cable

A Console cable is used for managing / configuring network devices such as network switches, routers, modems, hubs and similar devices. Cisco network devices in particular usually has a RJ45 port for management, which is also why this cable is also sometimes called a 'Cisco console cable', management cable or rollover cable.

The RJ45 end of the cable is not a regular RJ45 Ethernet connection cable even it looks like this, instead it's actually a serial interface, providing TX and RX lines, just like a standard RS232 connection.
The USB end of the cable is converting the serial data into a virtual COM port on the computer it's connected to, with help from virtual COM port drivers on the computer.

This USB Console Cisco rollover cable is compatible with most routers, including Cisco, Ubiquiti, Juniper, TP-Link, providing an easy way of programming a network device. Drivers support Windows, Mac and Linux.

In case your network device has a DB9 serial port instead of a RJ45 port then you can use a DB9 Female to RJ45 Modular Adapter in combination with this Console cable.