Internet的主要应用Major applications of the Internet.docx

1、Internet的主要应用Major applications of the InternetInternet的主要应用（Major applications of the Internet）The world wide web (WorldWideWeb, WWW, or 73) is also known as W ton, which is one of the major applications of the Internet. Through HyperText (HyperText), WWW provides users with all-round multimedia in

2、formation, thus providing Internet users with a new way of obtaining information and sharing information.The Internet professional management organization is the InerNIC, which is the administrative center of the international Internet. Its main job is to allocate IP address, manage domain name reso

3、urces and unify resource locator.1. The world wide webThe world wide web (WWW) is a global information resource network that integrates multimedia information such as text, sound, image and video on the Internet. It is an important part of the Internet. Browser (Browser) is the bridge to the WWW and

4、 WWW information window, through the Browser, users can roam in the oceans of the Internet, all of the information search and browse their interested in.WWWs web page is written in hyperfile markup language HTML and runs under hyperfile transfer protocol HTTP support. Hypertext not only contains the

5、 text information, including graphics, sound, image, video and other multimedia information (the hypertext and hypermedia) said, more important is implicit in the hypertext links to the other hypertext, this link is called HyperLinks (HyperLinks) use of hypertext, users can easily from one web links

6、 to other relevant content on a web page, without having to care about these scattered web pages where the host.The WWW browser is a client program whose primary function is to enable users to access various resources on the Internet. Commonly used browser is Microsofts InternetExplorer (IE) and the

7、 Navigator/COIIIII111 day iCator. SUN also developed a browser IfotJava written in Java. Java is a new, independent of the various operating systems and platforms of the dynamic interpreted language, Java web browsers have a dynamic effect, provides real-time interactive function for the machine use

8、rs. Java is currently supported by commonly used browsers.E-mail E - mailE-mail is the most widely used service on the Internet. Users can connect to InterIIet, with programs to send and receive E-mail, you can with all E-mail users on the Internet is convenient, fast exchange E-mail, also can send

9、multiple users with an email, or will receive the mail forwarded to other users. In addition to text, you can also include audio, image, application and other documents. In addition, users can subscribe to e-magazines online, get required documents, and participate in relevant discussion groups.Emai

10、l must have corresponding software support. The commonly used email programs include Exchange and 011tholt-express, which provide mail receiving, editing, sending and managing functions. Mail server using the protocol has a simple mail transfer protocol (SMTP (SimpleMailTrmsferProtocol), E-mail, exp

11、anded agreement MIME (MultipurposeInternetMailExtensions) and post office POP (PostOfficeProtocol).The POP service is provided by the mail server and the user must obtain an account on the mail server to use the service. The popular POP protocol, which is currently used in the third edition, is also

12、 known as the POP3 protocol.3. The UsenetUsenet refers to a variety of thematic discussion groups. Usend is used to publish announcements, news, reviews, and various articles for online users to use and discuss. The content of the discussion is organized by different thematic classifications, each o

13、f which is a task group, known as a newsgroup, and there are more sub-topics within it.Every news Usend guided by a distinction between types of tags, each newsgroups around a theme, such as comp. (computer science), MWS. News and information (Usermt itself), the rec (sports, arts and entertainment)

14、, sci. (science and technology), SOCJ (social), talke (the discussion), misc. (other), biz. business issues) interested in addition to the two users can choose to participate in the project team, also can open a new task on your own. As long as someone is involved, the task group can remain; If no o

15、ne participates for a while, the task group is automatically deleted.4. FTP file transferUsers will be on the FTP file transfer service allows Irlternet on a computers file transfer to another stage, almost all types of files, including the text file, binary executable file sound files, image files,

16、 data compression, etc., can use FTP FTP file transfer service is a set of software, before it for file transfer interface, using a simple get or put command to download or upload files like on IIItemet executable copy command. Most FTP server hosts use the Unix operating system, but ordinary users

17、can easily use FTP via Windows.The biggest feature of FTP is that users can use numerous anonymous FTP servers on the Internet. Anonymous servers refer to systems that do not require special user names and passwords. When a user connects to an anonymous FTP server, you can use anonymous as a user na

18、me and log in as a password with your E-mail address. When the login is successful, the user can download the file from the doctors server. The standard directory for anonymous servers is pub and users can usually access files in all subdirectories in that directory. Most anonymous FTP servers do no

19、t allow users to upload files based on security concerns.Make a remote landing on hindTelnet is the protocol for the Internet remote login service, which defines how remote login users interact with the server.Telnet allows users to log on to a remote time-sharing system on a networked computer, and

20、 then use the remote system as if they were using their own computers.To use the remote login service, you must start the client application on the local computer, specify the name of the remote computer, and establish a connection through the Internet. Once the connection is successful, the local c

21、omputer can directly access the resources of the remote computer system. Remote login software allows users to interact directly with remote computers,With a keyboard or mouse operation, the client application sends the relevant information to the remote computer, and then the server returns the out

22、put to the user. After the user exits the remote login, the users keyboard and display control are returned to the local computer. The user can log in remotely through the Telnet client of Window.e-commerceE-commerce refers to the use of computer networks for business activities, which connects cust

23、omers, vendors, suppliers and employees. It refers to the electronic, networking and automation of business activities.7. The Internet telecommunicationUsually refers to the Internet to complete the voice, fax, video transmission and other telecommunication services. IP telephony is the most commonl

24、y used InternetTelecommunications business, also known as Internet phone or Internet phone.Voice of IP phone is to use IP (Internet/Intranet) data network for transmission. Voice (analog signal) first by the digital signal processor (DSP) converts it to digital signal, then the digital signal is com

25、pressed into a more convenient for network transmission of data packets, and after that, through the Interlet to transmit the packet to the destination, the reverse process at the destination to unzip, unpacking, conversion, / delivered to the other receiver. Due to adopt the way of storing a forwar

26、ding in the Internet transfer packets, is not an exclusive circuit, and a large proportion of compression of speech signal processing, therefore, IP phone bandwidth is only 8 lOkb/s, less than 1/8 of the analog phone the bandwidth required, plus the Internet billing data transmission way has nothing

27、 to do with distance, natural greatly save the long distance communication costs.8. Ip-based video businessSuch applications mainly include lPTV and Internet video meetings.Based on the digital video communication conference, TV has been developing for more than 20 years, and it has entered an impor

28、tant stage of transformation with the integration of three networks (computer network, telecommunication network and cable TV network). One of the transformations is the transmission network foundation, the transition from the dedicated network to the IP network; The second is that the targeted serv

29、ices will be extended to small working group meetings, personal working desks and family extensions.The characteristics of the InternetFlexible and diversified access to the Internet is an important reason for the rapid development of Internet. Any computer that USES the TCP/IP protocol is connected

30、 to any one node in the Internet and can be part of the Internet. The TCP/IP protocol successfully addresses the compatibility issues between different hardware platforms, different web products and different operating systems, and has become the DE facto international standard for computer communic

31、ation.The Internet has adopted the most popular customer service operation mode in distributed network, which greatly increases the flexibility of network information service. The user can make requests from the client program on his computer and communicate with the host that has the corresponding

32、server program to obtain the information needed.Internet has integrated network technology, multimedia technology and hypertext technology, which embodies the development trend of various information technologies to integrate with each other, and truly play their due role.Internet provides new means

33、 for teaching 4 scientific research, commercial advertisement, telemedicine diagnosis and weather forecast.Internet service charges are low. Low fee strategy can attract more users to use the network, thus forming a virtuous circle. The Internets charging standards have been completely accepted by users.With