You can access the vro through the terminal console, TTY line, VTY line, SNMP-based network management, and RMON.

Vro is a commonly used network device. This article describes how to access a vro through Terminal console, TTY line, VTY line, SNMP-based network management, and RMON. I believe that reading this article will help you.

The terminal Console simulates the terminal into the vro and configures the vro.
Router # configure terminal (entering Configuration Mode)
Router # line con 0 (enter the console configuration)
In line con configuration mode, you can set the timeout time for idle time to exit the console, such as timeout and password.

TTY line, Cisco router asynchronous port, remote PC, Macintosh or UNIX host access through MODEM dialing.
Router # configure terminal (entering Configuration Mode)
Router # line tty line-number [ending-line-number] (enter the tty configuration)
You can set the user name, password, and other security access control for the dial-in.

VTY line, corresponding synchronization ports, such as Ethernet, serial, Token Ring, and FDDI interfaces, accessed through Telnet.
Router # configure terminal (entering Configuration Mode)
Router # line vty line-number [ending-line-number] (enter the vty configuration)
Ending-line-number is the final vty number. It indicates that several telnet connections are allowed at the same time.
Router # exec-timeout minutes [seconds] sets the idle timeout time and exits telnet access.

The SNMP-based network management protocol is specified on the vro. All Network Software Based on SNMP can manage the vro.
Router # snmp-server community string [view-name] [ro | rw] [number]
Vty: virtual terminal type
Tty: tele terminal type