Setting up Telnet

To access a Cisco device using telnet, you first need to enable remote login. Cisco devices usually supports 16 concurrent virtual terminal sessions, so the first command usually looks like this:

HOSTNAME(config)line vty 0 15

To enable remote login, the login command is used from the virtual terminal session mode:

HOSTNAME(config-vty)login

Next, you need to define a password. This is done using the password command from the virtual terminal session mode:

HOSTNAME(config-vty)password PASSWORD

Let’s try this on a real router. First, we will try to access the router without enabling telnet on a device:

telnet unsuccessful

As you can see in the picture above, we can not access a Cisco device using telnet before setting up the password. Let’s do that:

setting up telnet

Now, let’s try to access our device:

telnet successful

This time, because telnet was configured on the device, we have successfully telnetted to the device.

Prerequisites for 200-301

200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, and even some programming concepts. As with other Cisco certifications, you can take it at any of the Pearson VUE certification centers.

The recommended training program that can be taken at a Cisco academy is called Implementing and Administering Cisco Solutions (CCNA). The successful completion of a training course will get you a training badge.

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