Web Science/Part1: Foundations of the web/Internet vs World Wide Web/Design principles of the web/quiz

{Assume the World Wide Web was a hypertext system that made use of a central link data base to link the documents. What would be the advantages and disadvantages of this approach? +- All links would be working all the time. -+ The link database would have to scale. -+ Control of the entire system would be at one spot. +- we would know and be able to query the backlinks of a document
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 * advantage | disadvantage

{Why is the test of independent invention (TOII) so crucial for the success of the World Wide Web?} - In this way the used technology aims to become unique. + In this way the used technology aims to become universal. + If two similar systems arise it enables smooth integration with only incremental effort. + It enables interoperability. - With the TOII in mind everyone can implement the standards and contribute to the web by running its own web server and link its information

{Why was the Error 404 in combination with broken links so important for the success of the web? - It saved programming time not to verify links which could be used to develop better web browsers + It was the reason for the web to scale + Accepting inconsistency simplifies many problems in distributed systems - Without it the web could not have build on top of TCP/IP since it is a result of using TCP/IP.
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{Why were URLs needed to create the World Wide Web? What design goals have been reached? + The domain name system was only able to address computers on the internet. When you want to link information like documents a way of globally addressing files is necessary - To permanently and uniquely give addresses to files - To be able to identify every file on every computer all the time. - To publish a document at the same address independent of the computer and directory it is stored on.
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 * even though good URL should never change no one hinders you from doing so.
 * URLs are not used to have a global namespace for files. Files change. resources identified by an URL should not change