cpt 499 internet skills for educators overview of the internet session one
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CPT 499 Internet Skills for Educators
Overview of the InternetSession One
Objectives
Describe the Internet and its history; and explain how to access the Internet
Describe the WWW in context of hypertext and hypermedia
Distinguish between a Web server and a Web client
Objectives
Distinguish between HTTP and HTML
Use a browser to access the WWWDefine a URL and give specific
examplesDescribe how to enter a URL
address in a browser
Objectives
Define a hyperlinkExplain why hyperlinks within a
document appear in two different colors
Describe the various buttons on a browser
Explain how to create a bookmark
CPT 499 Internet Skills for Educators
A network can be considered to be any two computers connected so that they can exchange information between each other
CPT 499 Internet Skills for Educators
A network can be made up of many computers that are all able to exchange information with one another
As long as a way exists to connect computers so they can exchange information a network exists
CPT 499 Internet Skills for Educators
Not only can computers be connected to make up a network, but networks can also be connected together through the use of bridges or gateways which allow networks to exchange information thus creating a network of networks
CPT 499 Internet Skills for Educators
The Internet is a network of networks
It is a giant network made up of smaller networks
CPT 499 Internet Skills for Educators
The internet is a network of networks that connects computers across the country and around the world
CPT 499 Internet Skills for Educators
In the United States, the government sponsored NSFnet (National Science Foundation network) provides a major backbone for the Internet by using major long-distance telephone carriers
CPT 499 Internet Skills for Educators
The important thing to note is that any given computer is capable of exchanging information with any other computer that is connected to the Internet
Internet connections are based on some variation of the client/server relationship
CPT 499 Internet Skills for Educators
This relationship works due to three major components:Telecommunications Connection - your computer (client) will be connected to the server via telecommunications hardware and software setup
CPT 499 Internet Skills for Educators
Server - a program that offers a service - computers on the Internet run servers to offer services - a user invokes a client program on their computer; the client contacts a server on a remote computer
CPT 499 Internet Skills for Educators
Client - a requesting program that uses the Internet to contact a remote server
CPT 499 Internet Skills for Educators
The Internet is an instantaneous communications channel that allows two or more computers, people, etc. to exchange information, ideas, or anything else that can be sent electronically
CPT 499 Internet Skills for Educators
Primary capabilities are information retrieval and worldwide communication
Three Basic characteristics Immediacy, Two-way nature, and Global nature of medium
CPT 499 Internet Skills for Educators
Begun in 1969 to test the feasibility of a wide area computer network (WAN) over which people could share data and messages
CPT 499 Internet Skills for Educators
Grew out of DOD experiment
No central authority
Each computer attached to the network (node) is equal to all others
CPT 499 Internet Skills for Educators
Originally known as ARPAnet which consisted of four computers
Today the Internet includes millions of computers worldwide
Brings a worldwide library of on-line information resources concerning a myriad of topics to anyone who has connectivity to the Internet
CPT 499 Internet Skills for Educators
Some common Internet services Electronic mail Telnet Anonymous FTP WAIS
Newsgroups IRC WWW
CPT 499 Internet Skills for Educators
An Internet service is the exchange of a common type of information between application programs running somewhere on the Internet
Electronic mail [e-mail] is an Internet service
CPT 499 Internet Skills for Educators
When two or more e-mail applications pass messages between themselves on the Internet, this is knows as the Internet electronic mail service
CPT 499 Internet Skills for Educators
The particular mail applications themselves are Internet applications, not an Internet service
Internet applications can be running on different platforms yet use the same Internet service
CPT 499 Internet Skills for Educators
E-mail is one of the most commonly used Internet service
Allows users to exchange electronic messages
Most e-mail application programs generate mail messages in a standard format
CPT 499 Internet Skills for Educators
1991 Introduction of WWW WWW subset of Internet Documents are either hypertext or hypermedia
CPT 499 Internet Skills for Educators
Hypertext documents contain embedded links to other documents
Hypermedia documents contain embedded links to graphic, sound, and vides as well as text
CPT 499 Internet Skills for Educators
Data travels from a client to server and back through a protocol known as the HyperText Transfer Protocol (http)
CPT 499 Internet Skills for Educators
The address (location) of a document is known as a Uniform Resource Locator (URL)
The URL is the primary means of navigating the WWW
CPT 499 Internet Skills for Educators
The URL consists of several parts http://www.netscape.com/vt/usa.html
http:// represents the means of access
www.netscape.com represents the Web site
CPT 499 Internet Skills for Educators
vt represents the pathusa.html represents the documentThe URL can be read from right to
left
CPT 499 Internet Skills for Educators
Gopher Menu-based service for finding
resources on the Internet
FTP
File Transfer Protocol governs how computers exchange files
A protocol is a set of rules by which computers interact
CPT 499 Internet Skills for Educators
Chat Rooms Means of instantly communicating with
people all over the world by using chat program
Allow user to send messages to everyone else who is logged into the same channel at the same time
A channel is similar to a global conference call
CPT 499 Internet Skills for Educators
Offline subscription service Subscription to mailing lists Usenet NewsgroupsNewsAllows user to subscribe to one or many
discussion groups
Web Publishing
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