Cyber Word of the Week: What Are Ports?
Sep 11, 2025
Cyber Word of the Week: Ports
In cybersecurity, a port is a point where data enters or exits, either physically or logically.
Physical ports are the ones you can see and touch on your computer, like USB ports, HDMI, or Ethernet. These allow physical connections between devices.
Logical ports are virtual points used in networking. They help computers communicate over the internet or local networks. Each logical port is identified by a number (from 0 to 65535) and used by different services and protocols.
Common Logical Ports:
Port 80 – HTTP (web browsing)
Port 443 – HTTPS (secure web browsing)
Port 25 – SMTP (email sending)
Port 22 – SSH (secure remote login)
Port 3389 – RDP (remote desktop)
Why It Matters
Ports are essential for connectivity, but they’re also common attack points. That’s why closing unused ports and monitoring network traffic are crucial parts of cybersecurity best practices.
Keep learning and check out:
Defense in Depth: What It Is and Why You Need It
🔧 Get Your Free Pentesting Tools Checklist
Join the Cyberwise mailing list and get instant access to a curated checklist of trusted tools for password cracking, web apps, and network testing — plus occasional tips and updates to support your cybersecurity journey.
We hate SPAM. We will never sell your information, for any reason.
