Binary numbers, ones and zeros — the language of computers. The entire Network Engineering industry can be diluted to having a goal of simply carrying those ones and zeros between two computers. In this video,… Read More »Binary Numbers — Counting and Converting
Recently, I got a chance to play around with some features of Cisco IP SLA and wanted to share a few things I learned. Namely, how to use a Cisco Router to generate mock traffic… Read More »Cisco IP SLA — Using a Cisco Router to generate traffic
Whenever possible, Routers should have multiple paths (or routes) to get to a target network — this is a key component for network resiliency. Which means Routers routinely compare routes to choose one preferred path… Read More »Route Precedence — How does a Router choose its preferred path?
These five terms all refer to somewhat overlapping concepts. As a result, some confusion has surfaced about what each of these terms actually mean, and how they differ from each other. That is what this… Read More »Classful vs Classless vs CIDR vs FLSM vs VLSM
I just released a new videos which teaches VLANs in the absolute simplest way. This is how I wish VLANs were taught to me when I first started my Networking journey. I have since taught… Read More »VLANs – the simplest explanation
I’ve just completed Part 2 of the VLSM and FLSM extensions of the Subnetting Mastery video series. The series now, more than ever, covers everything anyone would ever need to know about Subnetting. The series… Read More »FLSM and VLSM – Part 2
After many requests to extend the Subnetting Mastery video series, I am adding an appendix which will cover Fixed Length Subnet Masks (FLSM) and Variable Length Subnet Masks (VLSM). This is Part 1, which teaches… Read More »FLSM and VLSM – Part 1
The terms Voice VLAN or Auxiliary VLAN typically mean the same thing: They are a feature which allows an access port — which normally only accepts untagged traffic for a single VLAN — to also… Read More »Voice VLAN – Auxiliary VLAN