Learning Networking - Help ?

daytonjohn asked this question on 11/25/2012. It has been viewed 682 times, and is currently resolved.

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What is the difference between ping, telnet, console port ?


Answer from dwirch on 11/25/2012

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Ping is used to test a network connection. When using ping for fault isolation, it should first be run on the local host, to verify that the local network interface is up and running. Then, hosts and gateways further and further away should be pinged. More info on Ping can be found here

Telnet is a terminal emulation program for TCP/IP networks such as the Internet. The Telnet program runs on your computer and connects your PC to a server on the network. You can then enter commands through the Telnet program and they will be executed as if you were entering them directly on the server console. This enables you to control the server and communicate with other servers on the network. To start a Telnet session, you must log in to a server by entering a valid username and password.

Router console ports are meant to allow root access to the router via a dumb terminal interface, regardless of the state of the router (unless it is completely dead). By connecting to the console port you can get remote access to the root level of a router without using the network that the router is connected to. This creates a secondary path to the router outside the bandwidth of the network which needs to be secured without relying on the primary network.

This allows a technician sitting in a Network Operations Center thousands of miles away the ability to restore a router or perform an initialization configuration securely over a standard telephone line even if the primary network is in failure. Without a connection to the console port, a technician would have to visit the site to perform repairs or initialization.


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