Introduction to Networking How the Internet Works There and back again Good morning everyone! I am here to present to you the website of the University of Regina Carmeli that was launched and made visible online last May of 2006. To start of, allow me to show you the captured default page of the university website. Introduction to Networking

What is a Network? A set of computers connected together so that they can communicate. Two types of networks Local Area Networks (LANs) Ethernet WiFi Wide Area Networks (WANs) The Internet is a WAN

Network Devices

WHAT IS LAN? Local?

WHAT IS WAN? Wide?

THE INTERNET A typical Internet connection requires a Internet device, a modem, and an Internet Service Provider (ISP). Devices ISP Internet Modem

TYPES OF NETWORKING SERVERS File Servers Web Servers Print Servers Application Servers Games Servers VOD Servers

WHAT IS INTERNET? Large WAN Client Server based

How the Internet Works What is a domain name? IP address 199.95.72.10 Text version of an IP address Components are separated by periods Each domain name represents one or more IP addresses IP address 199.95.72.10 www.scsite.com Domain name

How the Internet Works What is a top-level domain (TLD) abbreviation? Identifies the type of organization associated with the domain Sometimes called dot com when TLD is com TLD Abbreviation Type of Domain Com Commercial organizations, businesses, and companies Edu Educational institutions Gov Government agencies Mil Military organizations Net Network provider Org Non-profit organizations

Impact Daily Life

BASIC SERVICES OF THE INTERNET

WORLD WIDE WEB WWW is a part of the Internet. Accessed with web browsers Transfer with HTTP/HTTPS Needs routers, web servers, and DNS servers

Uploads and Downloads Bandwidth Throughput

The Internet is Fault Tolerant

The Internet is Scalable

Security

The World Wide Web

Tim Berners-Lee Created the World Wide Web Director of the World Wide Web Consortium (W3C) at MIT

The World Wide Web What is a Uniform Resource Locator (URL)? Unique address for a Web page Browser retrieves a Web page by using the URL Also called a Web address Type the URL into the address text box on the browser and press the Enter key to display a Web page http://www.nationalgeographic.com/travel/index.html address text box

The World Wide Web What are the parts of a URL? protocol domain name path http://www.nationalgeographic.com/travel/index.html Click to view Web Link then click URLs

History of the Internet Who controls the Internet? The Internet is a public, cooperative, and independent network No single entity controls or owns the Internet Several organizations advise and define standards World Wide Web Consortium (W3C) Oversees research and sets standards and guidelines Internet2 (I2) Internet-related research and development project Develops and tests advanced Internet technologies

The World Wide Web What is the World Wide Web (WWW)? Also known as the Web A worldwide collection of electronic documents Each document on the Web is called a Web page Can contain text, graphics, sound, and video Can contain built-in connections to other documents A Web site is a collection of related Web pages

The World Wide Web What is a Web browser? Also called a browser Software program that allows you to access and view Web pages Two popular browsers for personal computers Chrome Internet Explorer Next p. 2.9 Fig. 2-6

The World Wide Web What is a search engine? A software program you can use to find Web sites, Web pages and Internet files Spider A program that reads pages on Web sites in order to find Web pages that contain the search text Also called a crawler or bot Search text A word or phrase entered in the search engine’s text box Also called keywords 25 Facts About WWW

The Internet Map

Quiz Monday Topics: Number base conversions Internet / WWW Networking Protocols Sources: Documents and powerpoints posted on website Notes on number conversions TCP/IP OSI foldable Format: T/F, MC