CSE3026: Web Application Development
The Internet & World Wide Web


Scott Uk-Jin Lee

Reproduced with permission of the authors. Copyright 2012 Marty Stepp, Jessica Miller, and Victoria Kirst. All rights reserved. Further reproduction or distribution is prohibited without written permission.

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1.1: The Internet

The Internet

The Internet
  • the Web is the collection of web sites and pages around the world; the Internet is larger and also includes other services such as email, chat, online games, etc.

Brief history

Key aspects of the internet

People and organizations

IETF ICANN W3C

Layered architecture

The internet uses a layered hardware/software architecture (OSI model):

Internet Protocol (IP)

Transmission Control Protocol (TCP)

1.2: The World Wide Web (WWW)

Web servers and browsers

web server

Domain Name System (DNS)

Uniform Resource Locator (URL)

More advanced URLs

Hypertext Transport Protocol (HTTP)

HTTP error codes

Internet media ("MIME") types

Web languages / technologies