Accessing a router using the command line interface (CLI) is an effective way to manage your network. To access a router's CLI, you will need to use either Telnet or Secure Shell (SSH) protocols. The main difference between the two is that Telnet is not secure and can be vulnerable to malicious attackers, whereas SSH provides a secure connection with encryption for added security.
Once you have established a connection via either of these protocols, you can enter commands into the CLI in order to configure and manage your router. Depending on the specific model of router that you are using, there may be different commands available; however, some common ones include “show ip route” which displays the routing table, “ipconfig” which shows IP address information for each device connected to the network, and “ping” which tests reachability between two devices on the network.
To ensure successful access to your router via CLI, it is important that you have enabled remote management in its settings first; this should be done after any initial setup has been completed. Additionally, make sure that all passwords are updated regularly as a precaution against unauthorized access attempts.