Web log

Most Web servers produce “log files,” timestamped lists of every request that the server receives. For each request, the log file contains anonymous information such as date and time, the IP address of the browser making the request, the document or action that is being requested, the location of the document from which the request was made, and the type of browser that was being used. Log files are usually used to ensure quality of service. They also can be used in a limited way to analyze visitor activity.