Errors with full description

Hello Friends. We are using internet daily and we got may types of errors but do you know the meaning of that error codes ?
Today I list the error codes with full descriptions and also I will show you whay these errors comes.

400 Bad File Request Usually means the syntax used in the URL is incorrect (e.g., uppercase letter should be lowercase letter; wrong punctuation marks).

401 Unauthorized Server is looking for some encryption key from the client and is not getting it. Also, wrong password may have been entered. Try it again, paying close attention to case sensitivity.

403 Forbidden/Access Denied Similar to 401; special permission needed to access the site — a password and/or username if it is a registration issue. Other times you may not have the proper permissions set up on the server or the site’s administrator just doesn’t want you to be able to access the site. Continue reading »