OV 1 - 1 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

The Internet

• World-wide network of computers connected by the TCP/IP

networking protocol.

client

client

client

server

server

server

OV 1 - 2 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

H TTP(W W W )

E m ail U sen e t G op h er F TP

In te rn e tS ervices

Internet services

OV 1 - 3 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

World Wide Web

• Service over the Internet to access hypertext documents (called

Web pages).

• Server

– store HTML files

– related HTML files = “Web Site”

– send HTML files to client

• Client software

– browser - display HTML files

– editor - to create HTML files

• HTTP - HyperText Transfer Protocol

• HTML - HyperText Markup Language

HTMLfile

HTMLfile

server

client

OV 1 - 4 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

HTML

• HyperText Markup Language

• Simple text files

– create using any text editor

• Non-platform specific files

• Contain “tags”

• <Div Align=“Center”>Welcome to the Home Page</Div>

OV 1 - 5 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

HTML browsers

• Netscape Navigator

• Microsoft Internet Explorer

• NCSA Mosaic

• Sun Hot Java

• Web Surfers Chameleon

• Lynx (text only browser)

Displays HTML documents

OV 1 - 6 Copyright © 1998 Ziff-Davis Education, a division of Ziff-Davis Inc. All rights reserved.

Jetaway Travel Home page