homework-2 Version 0 |
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👤 Author: by 565884233qqcom 2018-03-22 05:17:42 |
Homework_2
Name:陈武 Number:2015329620011 Class:计算机科学与技术1班
The Internet and the telephone system are similar-you can connect a computer to the Internet much like you connect a phone to the teltphone system.Once you are on the Internet,your computer becomes an extension of what seems like a giant computer-a computer that branches all over the world.When provided with a connection to the Internet,you can use a browser program to search the Web.
The providers are the most common way to access the Internet,which are already connected to the Internet and provide a path or connection for individuals to access the Internet.
Browsers are programs that provide access to Web resources.This software connects you to remote computers,opens and transfers files,displays text,images,and multimedia,and provides in one tool an uncomplicated interface to the Internet and Web documents.Browsers allow you to explore,or to surf,the Web by easily moving from one Web site to another.
Urls:For browsers to connect to resources,the location or address of the resources must be specified.These addresses are called uniform resource locators(URLs).
Html:Once the browser has connected to the Web site,a document file is sent back to your computer.This document typically contains Hypertext Markup Language(HTML).
javascript:Web pages also can contain special programming to add interest and activity.A language called javascript is often used to trigger simple interactive features,such as opening new browser windows and checking information entered in online forms.
AJAX: An advanced use of javascript called AJAX can be found on many interactive sites.This technology is used to create interactive Web sites taht respond quickly,like traditional desktop application software.
applets:applets are written in the Java programming language.These programs can be downloaded quickly and run by most browsers.Java applets are used to present animation,display graphics,provide interactive games,and much more.
Moblie browsers:Special browsers called mobile browsers are desighed to run on the protable devices.A mobile browser is displayed on a very small screen and special navigational tools are required to conveniently view Web content.