The third layer of the OSI Model, the network layer, is where most network engineers focus their time and expertise. As Darragh commented in my post on the data link layer, Layer 2 is cool but Layer 3 ...

First off, howdy and welcome to the inaugural post of the EtherGeek blog. My name is Josh Stephens and I’m Head Geek and VP of Technology at SolarWinds, an IT management software company in Austin.

Knowledge of the structure of Internet Protocol (IP) packets is a fundamental part of understanding the Internet and how information moves from one point to another. The benefits of such knowledge ...

Layers 7 through 4 are geared more to the application than the lower layers, which are designed to move packets from one place to another no matter what they contain. This top layer defines the ...