The server is aware of

• The user's IP address - and maybe their host name
• The user's authentication credentials, if any
• The server's awareness of the date and time
• The user's HTTP request
• The server's status fulfilling the request
• The number of bytes sent to the user, if any

these are the items that the server records, thus our log entries look like this:

127.0.0.1 - - [22/Jul/1999:15:00:00 -0700] "GET / HTTP/1.0" 200 1622