Internet routers dns and html
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128.230. Internet, Routers, DNS, and HTML. 10. 14. 11. Chicago. Boston. CNY. 13. Seattle. Yale. 15. NYC. 12. 9. DNS: cs.colgate.edu = 149.43.3.23 ………. 149.43.1.7 149.43.3.23 (cs.colgate.edu) 149.43.2 149.43.80.142 …………. ~chungli public_html/ index.html. Denver. 3. html.

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Internet, Routers, DNS, and HTML

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Internet routers dns and html

128.230

Internet, Routers, DNS, and HTML

10

14

11

Chicago

Boston

CNY

13

Seattle

Yale

15

NYC

12

9

DNS:

cs.colgate.edu = 149.43.3.23

………..

149.43.1.7

149.43.3.23 (cs.colgate.edu)

149.43.2

149.43.80.142

………….

~chungli

public_html/

index.html

Denver

3

html

SF

7

16

We need a DNS to translate this domain name so the router knows how to forward the message.

Suppose the IE is configured to use the DNS in SF

DNS:

cs.colgate.edu = 149.43.3.23

………..

8

17

2

LA

4

Houston

6

1

address: http://cs.colgate.edu/~chungli

5

UCLA

cs.ucla.edu/~aaahttp://cs.colgate.edu/~chungli

18

………….

131.179.128.25 (cs.ucla.edu)

………….

I.E.

131.179.128.25/~aaahttp://cs.colgate.edu/~chungli

131.179.128.25/~aaa149.43.3.23/~chungli

R

19


C o s m e t i c s h t m l

Cosmetics & HTML

Cosmetics :

Tools or material to make up faces

Face + (????)

HTML : HyperText Makeup Language

Tools or material to make up hypertext document

HTML Document = Hypertext + HTML Tags


Hypertext html

HyperText & HTML

  • Text, tables, frames, pictures, images, links, scripts, etc.

  • Computer Language is the instruction to control the computer.

  • HTML is designed to make the above objects in a hypertext look nicer.

How: An html document is stored in plaintext format (why?) but uses tags to distinguish the text for the reader from the instructions to the computer.

An HTML document can:

Provide information to Search Engines, instruct web browsers (IE, Netscape, Hotjava..), send and collect information to and from web vierwers.


Text and hypertext

Text and HyperText

Mathematicians and Philosophers

by Chung-Chih Li

Rene Descartes:

"I am thinking, therefore I exist."

Descartes was the most important figure in modern mathematics and philosophy, and this probably is the most famous say of Descartes; but what does it really mean? The existence is established necessarily via mankind's awareness, which seemed self-evidence to Descartes, but some obvious objections followed immediately. You may want to see the excellent debate in Meditations on First Philosophy edited by John Cottingham --, which is a collection of Descartes' Meditations, their objections, and Descartes' replies.

"The brain is a machine."

<h1> Mathematicians and Philosophers </h1>

<div class="author">by Chung-Chih Li </div>

<h3> Rene Descartes: </h3>

<h4> "I am thinking, therefore I exist.“

</h4>

Descartes was the most important figure in modern mathematics and philosophy, and this probably is the most famous say of Descartes; but what does it really mean? The existence is established necessarily via mankind's awareness, which seemed self-evidence to Descartes, but some obvious objections followed immediately. You may want to see the excellent debate in <em class="s"> Meditations on First Philosophy </em> edited by <strong> John Cottingham </strong> --, which is a collection of Descartes' Meditations, their objections, and Descartes' replies.

<h4> "The brain is a machine. " </h4>

Text: Every letter in a text document is for its reader to read.

HTML Document: Some letters or words are not for its reader to read but for computer to control the appearance of the text or perform some tasks; text, tables, frames, pictures, images, links, scripts, etc.

makeup


How to create html documents

How to create HTML documents?

  • Using tools, HTML editor, Web editor: Netscape Composer, MS Frontpage

  • Learn HTML tags and using a plaintext editor to create HTML documents.

PlainText editor : Only the letters seen on the editor screen will be stored (in ASCII), e.g, notepad, vi, emacs, winedt..


Internet routers dns and html

Tags

In general, a tag is an instruction to instruct the web browser how to present the objects ;

<h1>This is H1</H1>

start tag

end tag

End tag closes the effect

of start tag.

Some tags do not have end tags, e.g.

<br> : line breaking


Structure of an html document

Structure of an HTML document

<html>

<head>

  • In this head section, the web author can provide information about the page to the web browsers or search engines.

</head>

<body>

  • This is section where the web author puts the material for his/her readers to see.

</body>

</html>


Attributes of a tag

Attributes of a Tag

Some tags use attributes to specify how to perform their functions.

<font color=“green”> Turn me into green </font>

Attribute name

Attribute value

We can specify more than one attribute in a tag. E.g.

<font color=“green” size=+2> Turn me bigger and green

</font>


Hr tag

<HR> tag

Some tags generate objects for the web browser.

<hr size=10 color=“green" align="left" width=20%>

<hr size=10 color=“red" align=“center" width=50%>


Head tag

<head> Tag

<title> Basic HTML </title>

<meta http-equiv="Content-Type" content="text/html; charset=big5">

<meta name="Author" content="Chung-Chih Li (Dennis)">

<meta name="GENERATOR" content="Microsoft FrontPage 3.0">

</head>


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