Building on the Networking Basics article previously written and a high-level overview of How Servers Serve Content, I wanted to write about how data actually moves over a network. That is, what happens when a user on a network node communicates with another networked node. There are two main models that are accepted: the Open Systems Interconnection (OSI) model separates … [Read more...]
Self-Help Network Troubleshooting Guide
If you’ve ever had to troubleshoot a technical issue, surely you know that having pertinent information related to the issue is vital. This could include steps to reproduce the error, any captured logs detailing the issue at hand, or even steps taken attempting to (unsuccessfully) resolve the issue(s). With that being said, I will also say that there can be times of having too … [Read more...]
How Servers Serve Content
Computers seem to be virtually limitless in their abilities – they can send and receive digital information, serve content via many defined protocols, compute algorithms much faster than a human can, and even provide countless hours of fun and entertainment. One very common use of computers is indeed serving content to consumers, a technological concept known as client / server … [Read more...]
Networking Basics
Computers are a great tool and provide many perks to their users; they can perform tasks in a rather impressively fast manner, potentially offer paperless offices, and you’re even able to play computer games…of course not during working time! Aside from these great benefits, however, how useful would they be if we typed something up, had to print it (thus negating the … [Read more...]
Where in The World Is That Network Traffic Coming From?
In a past article, I explained how to auto-block hosts with a WatchGuard Firebox. Yesterday alone my logs showed over 100 IP addresses auto-blocked in one day on a Firebox used for testing purposes. The list included over 1000 blocked IP addresses. I also noticed the Firebox shows a limited number of blocked hosts so the total number of blocked hosts may be longer than what the … [Read more...]
