You have several plain-text firewall logs that you must review to evaluate network traffic. You know that in order to do fast, efficient searches of the logs you must use regular expressions. Which co

A relational database requires importing data into structured tables first and uses SQL rather than regex natively, making it impractical for quick ad-hoc log searches.

MS Excel is a spreadsheet application without native regex support and is not a command-line utility suitable for fast log analysis.

Notepad is a basic GUI text editor that lacks regex search functionality and cannot efficiently handle large log files.

Grep (Global Regular Expression Print) is a Unix/Linux command-line tool purpose-built for searching text using regular expressions. It can rapidly scan large plain-text log files line by line and return only matching patterns, making it the standard tool for network and firewall log analysis in security operations.