World Wide Web www（World Wide Webis not a special kind of computer network, the World Wide Web is a large-scale, online information storage, English abbreviation for the Web. The World Wide Web uses links to make it easy to access a site from one site on the internet to get rich information.
Knowledge Blind Area:In many people's view, the Internet, the Internet, the World Wide Web does not have the most difference, in fact, the relationship between the three should be:
Internet includes Internet, Internet includes www。 1.
Internet accessAll of the devices that can communicate with each other is called the Internet, even if only two machines (computers, mobile phones, etc.), regardless of the technology used to communicate with each other, called the Internet, so the internet has WAN, metropolitan area network and LAN points, the international standard of the internet wording is
InternetLetters
IBe sure to lower case! 2.
Internet NetworkAnd the Internet is one of the Internet, it is not only a network of two machines, but a network of tens of millions of devices (the network has a large scale). Internet use
TCP/IPProtocols allow different devices to communicate with each other. But using
TCP/IPProtocol network is not necessarily the Internet, a local area network can also be used
TCP/IPAgreement. To determine whether they are connected to the Internet, the first is to see if their computer installed TCP/IP protocol, and then see if you have a public address (so-called public address, which is the address of all the private network address). The international standard of the internet notation is
InternetLetters
IBe sure to capitalize! The Internet is based on
TCP/IPProtocol is implemented,
TCP/IPProtocols are made up of many protocols, and different types of protocols are placed on different tiers, where there are many protocols at the application level, such as FTP, SMTP, and HTTP. Therefore, the services provided by the Internet generally include: www (World Wide Web) service, e-mail Service (Outlook), remote login (QQ) service, File Transfer (FTP) service, VoIP, and so on. As long as the application layer is using the
HTTPprotocol, known as the World Wide Web (Wide). In the browser to enter the Baidu website, you can see the Web page provided by Baidu Network, is because your personal browser and Baidu network between the server is used
HTTPAgreement in Exchange.
how the World Wide Web works:1. The World Wide Web distributes vast amounts of information across the Internet (
Internet) on each host, the document (HTML Documentare managed independently, adding, modifying, deleting, or renaming these documents does not need (and in fact is impossible) to notify thousands of nodes on the Internet. This is quite independent, and sometimes the link fails because the document has been deleted and so on. 2, the World Wide Web to client/server work, referred to as C/s architecture, usually the browser is the client program, the World Wide Web document (HTML DocumentThe host that resides is running the server program, so the host is also known as the World Wide Web server. 3, the client program makes a request to the server program, the server program to the client program to return the desired World Wide Web document (HTML Document), which is typical of
Request/ResponseModel.
issues that the World Wide Web must address in its normal work:1. How to sign thousands of Web documents distributed across the Internet? 2, in what way to let the client program and server program communication? 3, how to enable different authors to create different World Wide Web documents can be normal on the Internet display, but also to enable users to clearly know where there is what kind of link? To solve the first problem,
World Wide Web wwwUsed a
Uniform Resource Locator URL（Uniform resoutce Locator) to mark various documents on the World Wide Web, and to have a unique identifier for each document within the scope of the Internet
URL。 To address the second problem, communication between the World Wide Web client and the World Wide Web server program must comply with strict protocols, which is
Hypertext Transfer Protocol HTTP（Hypertext Transfer Protocol), which is why
HTTPis a
Application Layer ProtocolAs it runs on the application, using the transport layer's
TCPprotocol for reliable transmission. To solve a third problem,
World Wide Web wwwUse
Hypertext Markup Language HTML（Hypertext Markup Language), making the World Wide Web page (
Front EndThe designer can easily link from somewhere on this page to any of the World Wide Web pages on the Internet.The above is the author's personal understanding of the World Wide Web www, the content of the author's original, if there is a mistake welcome point.
World Wide Web www detailed
