!link!: Firewall

While a firewall is essential, it is not a silver bullet. Modern cybersecurity requires a multi-layered approach. A firewall won't necessarily stop you from clicking a phishing link in an email or downloading a malicious file yourself—that's where and common sense come in.

It stops hackers from remotely taking control of your webcam or accessing your files.

The "language" the data is speaking (e.g., HTTP for web browsing).

A firewall establishes a barrier between a trusted internal network (like your home Wi-Fi) and untrusted external networks (like the internet). It analyzes "packets"—small pieces of data used for communication—to determine if they should be allowed through or blocked. It makes these decisions based on:

Firewalls aren't one-size-fits-all. They generally fall into two main categories, often working together to provide "defense in depth." 1. Hardware Firewalls

A smarter version that tracks the state of active connections to ensure incoming data was actually requested.

Specific keywords or signatures that indicate malicious intent. Types of Firewalls