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XHTML Tutorial - Default Protocol and Port Number of a URL
(Continued from previous topic...)
What Happens If Protocol or Port Number Is Missing in a URL?
From a syntax point of view, all URL parts are optional.
If some parts are not included in a URL, the browser and the hosting computer
will provide default values. Here are some rules about the protocol name,
host name, and port number:
1. If the protocol name part is missing, but the host name part is given,
"http://" will be used as the default value. The following URLs are identical:
dev.fyicenter.com/faq/xhtml/
http://dev.fyicenter.com/faq/xhtml/
2. If the port number part is missing, but the host name part is given,
the default port number that matches the protocol name will be used.
The following URLs are identical:
dev.fyicenter.com/faq/xhtml/
dev.fyicenter.com:80/faq/xhtml/
http://dev.fyicenter.com/faq/xhtml/
http://dev.fyicenter.com:80/faq/xhtml/
3. If the port number part is given, the host name part must be specified.
The following URLs are invalid:
http://:8080/
:80
(Continued on next topic...)
- What Are Hyper Links?
- What Is an Anchor "a" Tag/Element?
- How To Define a Hyper Link?
- How To Define a Bookmark?
- What Is a URL?
- What Is the Structure of a URL?
- What Happens If Protocol or Port Number Is Missing in a URL?
- What Happens If a URL Starts with Path or File name?
- What Is a Relative Path Name?
- What Happens If File Name is Missing in a URL?
- How To Build Hyper Link Indexes within the Same Document?
- What Happens If a Hyper Link Points to an Image?
- What Happens If a Hyper Link Points to a Music File?
- What Happens If a Hyper Link Points to a PDF File?
- What Happens If a Hyper Link Points to a ZIP File?
- How To Create A Link to Open a Document in a New Window?
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