To which of the following are you most likely to connect to manage a Cisco router in ROMmon mode? (Select 2 choices.)
- an auxiliary port
- a console port
- a serial port
- an Ethernet port
- a VTY port
Of the available choices, you are most likely to use either an auxiliary (AUX) port or a console port to manage a Cisco router in readonly memory (ROM) monitor (ROMmon) mode. ROMmon is a management mode that Cisco routers and switches revert to when the system cannot find a software image, the software image is corrupted, or the configuration register has been set to manually enter ROMmon mode. Because ROMmon is an outofband management method, it can be used to recover system software images, passwords, or other configuration data even when the router or switch is in a state where it can no longer forward packets. On a Cisco router, you could use either the console port or the AUX port for outofband access if the router is in ROMmon mode. The AUX port on a Cisco router is typically capable of supporting most of the features available on a console port. Cisco switches either do not have AUX ports or do not support certain features, such as system recovery, on their AUX ports if they have them.
You are not likely to use a serial port, an Ethernet port, or a virtual terminal (VTY) port to manage a Cisco router in ROMmon mode. Serial ports and Ethernet ports are used to directly connect Cisco routers to other network devices. However, you cannot access ROMmon mode by using any of these ports. Management applications and administrators who want to manage a Cisco device when it is operating in its normal state could connect to the device by using VTY application protocols such as telnet or Secure Shell (SSH).