Top 15 Most Common Web Errors:
1) 500 Internal Server Error
2) 401 Unauthorized
3) 400 Bad Request
4) 403 Forbidden
5) 404 Not Found
6) 501 Not Implemented
7) 502 Service Temporarily Overloaded
8) 503 Service Unavailable
9) Connection Refused by Host
10) File Contains No Data
11) Cannot Add Form Submission Result to Bookmark List
12) Helper Application Not Found
13) TCP Error Encountered While Sending Request to Server
14) Failed DNS Look-Up
15) 408 – Request Time-Out