What does the '-w' option specify in the context of packet saving?

The '-w' option in the context of packet saving is used to specify the filename where packets will be saved. This option is commonly used in packet capturing tools such as tcpdump or Wireshark, allowing users to direct captured packets into a specified file for later analysis or review.

When using this option, you provide a file name, and the tool will write the captured packet data to that file. This is crucial for conducting forensic analysis, troubleshooting network issues, or any application where a record of network traffic is needed. The ability to save packets to a file facilitates post-capture examination and helps in long-term research or data retention purposes.

Understanding this option is essential for anyone working with network security or analysis, as saving packet data enables comprehensive review and aids in various cybersecurity tasks.