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Understanding TCP/IP

You're reading from   Understanding TCP/IP A clear and comprehensive guide to TCP/IP protocols

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Product type Paperback
Published in May 2006
Publisher Packt
ISBN-13 9781904811718
Length
Edition 1st Edition
Concepts
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Author (1):
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CP Books a.s. CP Books a.s.
Author Profile Icon CP Books a.s.
CP Books a.s.
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Toc

Table of Contents (20) Chapters Close

Preface 1. Introduction to Network Protocols FREE CHAPTER 2. Network Monitoring Tools 3. Physical Layer 4. Link Layer 5. Internet Protocol 6. IP Address 7. Routing 8. IP Version 6 9. Transmission Control Protocol 10. User Datagram Protocol 11. Domain Name System 12. Telnet 13. File Transfer Protocol 14. Hypertext Transfer Protocol 15. Email 16. Forums 17. Lightweight Directory Access Protocol A. CISCO Routers Index

14.7 Relative URI

If a URI does not start with a scheme name, then this is called a ‘relative URI’. A relative URI is always related to some base, i.e., to some absolute URI. This base can be the URI of the displayed document or even the URI of the previous document. If there is no such URI, an implicit URI of the application can be used.

A relative URI can contain. or .. characters; they are a reference to a working or parent directory respectively. A relative URI is parsed in several independent parts: a server name, a path including a file name, a request, and a fragment. Individual parts are separated by the following characters: # (fragment), ? (query string), and so on.

Let’s take the base (which is the absolute URI) and replace its parts by a relative URI from right to left. Hence, in the displayed http://www.company.com/path/file.htm page, the following hypertext references (relative URIs) can be found:

  • #paragraph1 that can be translated to the following absolute...
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