Disabling NBT via DHCP Option 43

Summary This will be a quick summary of how to disable NetBios over TCP/IP (AKA NBT) in an environment where your Cisco router provides DHCP services. First, a little bit … Continue Reading →

The “Inside & Outside” Of NAT For Overlapping Networks

Introduction     I have been doing a lot of mentoring lately, and have started thinking about different ways to explain certain concepts to people.  One of the things that … Continue Reading →

IPv6 Solicited-Node Addresses

Introduction   An IPv6 solicited-node address is a link-local multicast address used in IPv6.  Solicited-node IPv6 multicast addresses are used in IPv6 neighbor solicitation messages for layer 3 to layer … Continue Reading →

The Three Pillars Of Network Security

Introduction When dealing with network security, pretty much everything you learn about comes down to three basic principles.  If you gain a thorough understanding of these principles, I guarantee your … Continue Reading →

VTP Theory & Configurations

I just added a couple of new videos on my youtube channel covering VTP theory and configuration.  You can check them out there, or below. Enjoy