Category: Network Security

Read about how security administrators protect their networks .

Switch Security

I've made several posts about switches, how they function, and the amazing features they possess, but now it's time to talk about their security. Let's start with switching loops. Switching Loops and STP/RSTP In some cases, a network can develop a "switching loop," sometimes called a "bridging loop." In networks with a lot of switches, ...

PenTest Edition: My Favorite Wi-Fi Assessment Tools – 2018

Penetration testing and security analysis is an integral aspect of cybersecurity. The ability to master some of these tools is certainly indispensable. Penetration testers and other cybersecurity professionals use these tools everyday to examine the security posture of their networks. All of these tools are free to download; however, whether you can use them or ...

Port Mirroring on Switches

Modern switches have a lot of cool, useful features that make these devices simple to manage, but perhaps, more difficult to configure. In my last post about switches, I mentioned I'd go into a little more detail about the features that switches have to offer. One of the first features I mentioned was "port mirroring." ...

Why We Don’t Use Hubs Anymore

Hubs might appear to be Layer 2 (Data Link) devices, and I wouldn't blame you if you thought of them as such; however, hubs are actually Layer 1 (Physical) devices. Hubs are, in a sense, "dumb." They are unintelligent devices that simply provide connectivity to several devices. A long time ago, we used hubs as ...

Understanding and Identifying Logical Ports

Identifying Logical Ports There are two types of ports: physical and logical ports. Physical ports are the RJ-45 female jacks that are attached to a switch, router, firewall, server, patch panel, or Ethernet outlet. I've provided some examples below. The ports I'm talking about, however, are logical ports. Understanding Logical Ports In computer science, a ...