Chapter9 - CSE1520.03 Computer Use: Fundamentals The Glade...

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CSE1520.03 The Glade Computer Use: Fundamentals Laboratory Handbook Chapter 9: The Internet Objectives This laboratory introduces you to the Internet. You should gain an understanding of the following topics: A conceptual understanding of the structure and accessibility of information on the World Wide Web (WWW), referred to as the ‘web’, for short. Methods (protocols) for serving/accessing data. Methods of searching for information on the web (WWW) HTML NB. The Internet is constantly changing as data is updated, removed, or simply moved to a different storage place. Details of this lab will be out of date because of this constant evolution. Preparation In order to complete this lab in about 3 hours it is necessary for you to have a clear idea of your objectives. This lab will briefly introduce the idea of a web (WWW) browser, such as Internet Explorer/Firefox/Safari, and then explore how to search for information on the web, and finally provide a glimpse "under the hood" at HTML. It will not be enough for you to simply follow the steps because to properly understand the big picture of the worldwide distributed information services you will need to systematise and classify the navigation and access methods, searching techniques etc. Many details of these features are hidden by the powerful software tools you are using. You should make every effort to understand what you are doing and why you are doing it, rather than just following the steps. Read the whole of this lab carefully. Attend lectures on this topic There are many books about the Internet, any one of which will usefully complement the course materials. Introduction There is a lot of hype concerning the Internet. This lab will give you a picture of the reality of these services as they currently exist. There are certainly lots of cool things to do, and no doubt you will be tempted to spend much valuable time exploring this new world of information and entertainment - but a word of warning - please bear in mind the many other academic demands on your time. 9-1
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The Glade CSE1520.03 Computer Use: Fundamentals Laboratory Handbook Internet Protocols All applications that work over the Internet rely on the TCP/IP software. TCP stands for Transmission Control Protocol and IP stands for Internet Protocol. A protocol is simply a set of rules for defining how two machines must exchange data. Together the two pieces of software known as TCP/IP define how communications between computers on the Internet - at the level of bits - must take place. TCP/IP defines what is called a packet switching protocol. Any transmission of data from one location to another is broken up into small "packets" of data. Each packet sent out from the serving computer has the destination address attached to it, along with some other identifying information, in what one might call a wrapper or envelope by analogy with a piece of mail you might post. The packets might (and usually do) take different
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This note was uploaded on 12/15/2010 for the course CSE CSE 1520 taught by Professor Paul during the Spring '09 term at York University.

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Chapter9 - CSE1520.03 Computer Use: Fundamentals The Glade...

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