Archive for the ‘Networking’ Category


CCNA Security Exam Tutorial – When It’s Good to Add Salt

by Chris Bryant - 2 February 2009

When you started studying for your CCNA certification exam, one of the very first things you learned was the major difference between the enable password and the enable secret – the enable secret is encrypted by default, where the enable password is just sitting there in clear text, waiting to be read!

When you look at the enable secret in a Cisco router configuration, it looks like it would be impossible to guess. After setting the enable secret on this router to the word security, here’s how it appears in the configuration:

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Cisco CCNP ISCW Certification Exam Tutorial – The Key Difference Between IPS And IDS

by Chris Bryant - 4 August 2008

When it comes to your Cisco CCNP certification exams, success is in the details, and that’s particularly true of your ISCW exam.

You’re going to need to know all the vital details of configuring and troubleshooting Cisco’s Intrusion Prevention System (IPS), both from the command line and via Security Device Manager (SDM).

We first need to draw a clear line between the operation of the Intrusion Prevention System and the Intrusion Detection System (IDS). Those terms sound similar, but they’re quite different in operation.

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Cisco CCNP Certification exam tutorial – Knowing RADIUS and TACACS for your ISCW Exam

by Chris Bryant - 19 May 2008

Cisco switchesAs part of your CCNP certification exam studies, particularly for the ISCW exam, you need to be very clear on the differences between TACACS+ and RADIUS.

As a CCNA and future CCNP, you’ve already configured authentication in the form of creating a local database of usernames and passwords for both Telnet access and PPP authentication. This is sometimes called a self-contained AAA deployment, since no external server is involved.

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