Since a packet capture can reveal a various kind of information with right supporting tools to a user, it can be used in both positive and negative ways. There are other supported extension too like wcap, cap etc., This packet capture can be used to understand traffic and extract information which can further used in network troubleshooting, hacking, security auditing etc., Now a packet capture is a data collection technique that exactly copies a packet that is traversing in the network and show real-time in a favorite reader software OR save in a file with extension pcap for reading it later. Some sensors are useful to identify traffic violations, sometimes it is useful in identifying common issues vehicles are facing like cause of a traffic jam.Īpply this to network traffic. We place people or sensors to identify the number of vehicles pass on, type (Car/bus), color and so on. Imagine you are managing a city, and you want to understand what is happening in city roads. What is packet capture and what is the benefit of doing it? In macOS and Linux this is possible with built-in NIC card with OS tools. A compatible NIC card like Airpcap is required to do this. But Wireless pcap on Windows OS, inbuilt NIC and its drivers are not possible typically. pcap on wired wont be a challenge in Windows based machines. One of the reason I chose mac is to do “wireless” packet captures. Why macOS? This is a question most of us may have.
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