A customizable format, which has an array of information options to choose from
W3C log entries
The web log format for Windows-based web servers
The Microsoft Internet Information Service (IIS) logs
A non-customizable format, which produces more information than the standard NCSA Common Log Format
IIS log formats
These are some of the most commonly used HTTP servers
Apache and NGINX
Similar to Common Log Format but with more details at the end of the log input(includes the Referer)
The Combined Log Format
A standardized text file format generated by web server logs
The NCSA Common Log Format
Web server output their logs in a standardized format because
The raw data of web server logs can be hard to understand