Rollover cable is used to connect to which port on a router or switch?

• A. A cable used to connect a PC to a switch's Ethernet port
• B. A fiber optic patch cable
• C. A cable used for power supply
• D. A cable used to connect to a router/switch console port

Answer: (D)

Rollover cables are built for out-of-band management by connecting a computer to a device’s console port. The console port on routers and switches is typically an RJ-45 jack used for initial configuration and troubleshooting, not for normal data traffic. The rollover cable has its pinout reversed so the computer’s serial signaling can talk directly to the device’s console interface. You usually plug one end into a PC’s serial port (often via a USB-to-serial adapter) and the other end into the device’s console port, then use terminal software to configure or recover the device. This is distinct from Ethernet cables for network data, fiber patch cables, or power cords, which is why the console-port connection is the correct context for a rollover cable.