Collection of (1) Meta-network. Uses a standard set of protocols Also uses standards for structuring the information transferred

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2 Collection of (1) Meta-network That is, a (2) of (3) Uses a standard set of protocols Also uses standards for structuring the information transferred

3 Collection of (1)_networks_ Meta-network That is, a (2)_network_ of (3)_networks_ Uses a standard set of protocols Also uses standards for structuring the information transferred

4 (1) I (2) S (3) P allow subscribers to connect to the (4) often provide basic services such as (5) (6)

5 (1) Internet (2) Service (3) Provider allow subscribers to connect to the (4) _Internet_ often provide basic services such as (5)_ (6)_web hosting_

6 Transportation analogy sidewalks, streets, boulevards, highways and interstates Backbone is the internet equivalent of the (1) (in a US transportation analogy) NAPs: Network Access Points connect the backbone to regional networks How could you find out where the nearest NAP is?

7 Transportation analogy sidewalks, streets, boulevards, highways and interstates Backbone is the internet equivalent of the (1)_interstate highways_ (in a US transportation analogy) NAPs: Network Access Points connect the backbone to regional networks

8 1989 (1) Who? working for CERN Wanted a standardized way in which scientists could communicate with each other Codified (2)?, based on SGML Hyperlinking used Not a new concept but used in a new way Web metaphor emphasizes intricate interconnectedness of the WWW Milestone: 1993-National Center for Supercomputing Applications (NCSA) develops Mosaic (3) What was Mosaic? Marc Andreesen at U of Illinois Later Mosaic becomes (4)

9 1989 (1) Who?_Tim Berners-Lee_ working for CERN Wanted a standardized way for scientists to communicate with each other over the internet Codified (2)?_HTML, Hypertext Markup Language_, based on SGML Hyperlinking used Not a new concept but used in a new way Web metaphor emphasizes intricate interconnectedness of the WWW Milestone: 1993-National Center for Supercomputing Applications (NCSA) develops Mosaic (3) What was Mosaic?_The first browser Marc Andreesen at U of Illinois Later Mosaic becomes (4) _Netscape the first commercial browser_

10 File Transfer Protocol Prior to the web, the way to transfer files over the Internet Anonymous FTP

11 Transmission Control Protocol / (over) Internet Protocol Packet switched break down large chunks of data into smaller ones called packets IP moves these packets from node to node Delivery is based on unique IP numbers or addresses At delivery, TCP verifies that all the info is intact and reassembles it

12 Hypertext Links that make the pages and servers of the web interconnected Hypertext Transfer Protocol Protocol use to send information from a Web server to a requesting client application and vice-versa http request sent from user s (1)?, which is (2)? to the (3) and the response is the web page displayed in the (4)

13 Hypertext Links that make the pages and servers of the web interconnected Hypertext Transfer Protocol Protocol use to send information from a Web server to a requesting client application and vice-versa http request sent from user s (1)?_browser, which is (2)?_software to the (3)_Web server and the response from the server is the digital information that is displayed as a web page in the (4)_requesting browser s window_

14 request response

15 XHTML a set of codes or commands that describe the structure of the text and images The browser interprets how text and images appear to the user Uses tags open and close tags Open tag <h1> Corresponding close tag</h1> Content goes between the tags to mark up the text for structure <h1>this is a Heading</h1> <head></head> defines the information in the document header

16 The World Wide Web Consortium (W3C) is an international community where member organizations, a full-time staff, and the public work together to develop Web standards. Led by Web inventor Tim Berners- Lee and CEO Jeffry Jaffe, W3C's mission is to lead the Web to its full potential.

17 At w3schools.com you can learn how to make a website. We offer free tutorials in all web development technologies. In the menu on the left of the page, under HTML Tutorials, click on Learn HTML Look at the first example Click on Try it Yourself Edit

18 In the menu on the left of the page, under on HTML Tutorials, click on Learn HTML Look at the first example Click on Try it Yourself Edit the content marked up with h1 tags Click Edit and Click Me>> to see the result of the change you made

19 Effective short videos Recommends Notepad++ for creating basic XHTML and CSS markup Download and install on your own computer

20 A web browser is (1) that sends requests to the HTTP server from the client Capable of displaying the XHTML and content ( and other markup) that is sent in response Chrome Mozilla Safari Internet Explorer There are non-graphical, text only browsers Early development ASCII text only Very fast

21 A web browser is (1)_software that sends requests to the HTTP server from the client Capable of displaying the XHTML and content ( and other markup) that is sent in response Chrome Mozilla Safari Internet Explorer There are non-graphical, text only browsers Early development ASCII text only Very fast

22 Uniform Resource Locator (URL) or Uniform Resource Indicator (URI) text address of where the information is stored Each part of the URL has a specific meaning that is related to the information s location on the World Wide Web http-indicates the protocol to be used could be ftp or file or other under different circumstances domain name that identifies the web server where the files are stored cg/courses/cgt111 directory path on the web server TypeHandout.pdf file name of requested document

23 The text version of an IP address Each domain name has a unique IP address associated with it

24 An indication of the kind of domain.edu-educational.gov-government.com-commercial.mil-military.net-networking.org-nonprofit organization.biz.info Other?

(1) I (2) S (3) P allow subscribers to connect to the (4) often provide basic services such as (5) (6)

Collection of (1) Meta-network That is, a (2) of (3) Uses a standard set of protocols Also uses standards d for structuring t the information transferred (1) I (2) S (3) P allow subscribers to connect