Packet capture, or PCAP, is a method used to record and analyze data that moves through a network. It’s one of the most important tools in cybersecurity today.
To put it simply: packet capture is the process of collecting data packets—small chunks of information—as they travel across your network. These packets are saved in .pcap files and can later be analyzed to understand what’s really happening in your network.
Every action on a network—whether it’s opening a website, sending an email, or downloading a file—is made up of packets. By capturing them, security teams can:
- Monitor network activity in real time
- Detect cyber threats like malware or unauthorized access
- Troubleshoot network slowdowns or failures
- Investigate incidents after they occur
Behind packet capture are powerful tools like Fidelis Deep Session Inspection. Such tools help teams inspect both basic metadata (like IP addresses and timestamps) and deep content (like encrypted traffic or malicious payloads).
Packet capture isn’t just helpful during attacks—it’s also used to diagnose network problems, measure performance, and ensure everything runs smoothly. It provides real-time visibility and historical records, making it easier to spot issues before they become serious.
Understanding PCAP meaning goes beyond the technical term. It’s about gaining full visibility into your network—knowing exactly what data entered, left, or flowed within your systems. In a world where threats often hide in plain sight, packet capture gives you the clarity you need to stay ahead.
