Practical Networking .net

EIGRP Metric

The EIGRP Metric has caused confusion for many network engineers trying to understand the protocol. This article will dive into what the metric is, and how to boil it down into its simplified form. Formula and K-Values EIGRP is a Cisco Proprietary routing protocol created in the 1980s. As such, Cisco was the only vendor […]


EIGRP Terminology

Anyone who has ever studied the EIGRP protocol has at some point or another been confused by the awkwardly defined terminology that is incorporated into the protocol. This article’s purpose will disambiguate all the EIGRP terminology that causes so much confusion when trying to understand the protocol. Terms that Describe Routes From the perspective of […]


Square and Multiply

We’ve all done math problems that look like this: 35, 410, or N37. These are known as an exponentiation. And there is a trick to solving these problems with less calculations than simply multiplying the base number over and over again. That trick is known as the Square and Multiply method. Take 35. If doing that […]


Packet Traveling – Series Finale

In this series, we studied the different layers of the OSI Model, and how each of the seven layers provides a unique service which the other layers depend on. We also studied the key players of the Internet, where we defined a Host, Client, Server, Switch, Router, and ARP. As well as each of their […]


Packet Traveling

  If you’re reading this blog, then you are no doubt already familiar with the wondrous creation that is the Internet. The Internet allows computers from all over the world to speak to each other. When data leaves your computer, it is grouped into small chunks called Packets. These packets are essentially little envelopes that carry […]


Host to Host through a Router

We’ve looked at what it takes for two hosts directly connected to each other to communicate. And we’ve looked at what it takes for a host to speak to another host through a switch. Now we add another network device as we look at what it takes for traffic to pass from host to host […]


Host to Host through a Switch

In the last article, we looked at everything that happens for two hosts to communicate directly with one another. In this article, we will add a common network device: a switch. We will take a look at what happens for communication from Host to Host through a Switch. This article will be the practical application of everything […]


Host to Host Communication

After discussing the makeup of the OSI Model and some of the Key Players involved in moving a packet from one host to another, we can finally discuss the specific functions which occur in allowing Host to Host communication. At the very core of the Internet is this idea that two computers can communicate with […]