Solano Community College and

Present

Session III

The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks of local to global scope that are linked by a broad array of electronic and optical networking technologies. The Internet carries a vast array of information resources and services, most notably the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.

The Internet (Wikipedia Definition)

TCP/IPTransmission Control Protocol• Rules by which data are

sent between systems

Internet Protocol• Rules by which messages are

addressed

IP Address• Unique for every computer connected • IPv4

255.255.255.255Max = 4,294,967,296

• DNS – (Domain Name Server)204.17.179.65 = WWW.Solano.Edu

What’s in a Name??HTTP:HTTPS:File:

•Domain NameYouNameItNoSpaces

•Domain Type COM EDU ORG GOV

Browser• A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web.

Firefox freebee

Safari (Apple)

Internet Explorer (Microsoft)

Browser Review

A BC D

E F

G

H

I

IMAP vs POP• Internet Message Access Protocol– Email Stored on the Server– Allows you to read all of your email in multiple

locations. – Checking email may be faster

• Post Office Protocol– Email Stored on Your Computer by Your Client– Allows you to read previously received email and

attachments when offline.

GMail(Google)

YourName@domain.com