why are which letters, such as A, B, C, ..., or signs, such as #, *,...

why are which letters, such as A, B, C, ..., or signs, such as #, *, •, ..., are not allowed to be sent on a URL to a Web server.

Expert Solution

-> If we use capital alphabet like A, B, C in a URL, it causes issue if the website is hosted on Linux.
Suppose our URL is "www.test.com/About". If your website is on windows web server, it does not give cause any issue, because windows server is case insensitive. So even if you write "www.test.com/about" instead of "www.test.com/About", it does not cause any issue in windows server. But if the website is hosted on Linux, it considers "www.test.com/about" and "www.test.com/About" as two different URLs and will return you dead 404 page not found, if we call using "www.test.com/about". So it is better not to use capital alphabet like A, B, C etc to be sent on a URL to a web server.

-> #,*,. ...etc are considered as reserved characters in a URL. These reserved characters are used as delimiters in a URL. The main purpose of these characters is to act as delimiters that are distinguishable from other data in an URL. So these characters cannot be used directly on a URL to a web server. These characters must be percent-encoded if they are to be used in a URL.
eg: '%23' for '#', '%2A' for '*' etc.

venereology answered 3 weeks ago

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