What difference is there between PCAP and PCAP-NG data capture methods?

The distinction between PCAP and PCAP-NG primarily lies in the capabilities that PCAP-NG offers, particularly regarding time stamp information. PCAP-NG, which stands for Packet Capture Next Generation, extends the time stamp functionality compared to the traditional PCAP format. It allows for high-resolution timestamps that can be crucial for analyzing network traffic over time, especially in scenarios where millisecond or microsecond precision is valuable for discerning packet events in log files.

This capability is particularly important in environments where precise timing can impact network analysis and troubleshooting, such as in VoIP communications or high-speed network environments. The other options do not accurately represent the enhancements provided by PCAP-NG or may misrepresent the workings of PCAP, which can operate in various modes, including promiscuous mode, but is not limited to it.