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Table of contents
1. Computer network access method
2. Advantages of FTTH Internet access
2. The main application of computer network
1) Configuration of Edge browser
2) Firefox browser configuration
1. History of E-mail Development
2. Send and receive email online
foreword
This chapter will explain the basics of computers, access methods and applications of computer networks.
1. Computer network access method
If users want to use the services provided by hntemet, they must first connect their computers to Internet. At present, there are many ways to connect computers
to Internet, including FITH (Fiber To The Home, Fiber To The Home), ADSL. (Asymmetric Digital Subscriber Line) Broadband technology, leased line and cable TV cable, etc. Among the many internet access methods, FTTH technology is currently the most widely used access method.
1. Introduction to FTTH
Fiber (Fiber) To The Home (FTTH) is a transmission method of optical fiber communication.
FTTH is based on fiber optic cables and uses optoelectronics to transmit multiple services such as triple play of telephone, broadband Internet and TV to homes or businesses. Fiber Channel is used as the medium for information transmission due to its unique anti-interference, light weight and large capacity. Widely used.
2. Advantages of FTTH Internet access
Using FTTH to surf the Internet has the following advantages.
- Fast Internet speed: the optical fiber transmission speed can reach up to 255TB/s. The household optical fiber is 125Mbit/s.
- Long transmission distance: the optical fiber connection distance can reach 70km.
- Strong anti-interference ability, optical fiber is a non-metallic dielectric material, and is not subject to interference from strong electricity and electrical signals.
- Low cost: when surfing the Internet, you only need to pay the Internet access fee to the operator.
- Wide range of applications, FTTH can be widely used in home office, remote office, high-speed Internet access, online shopping, e-commerce distance education, video conferencing and other fields.
2. The main application of computer network
Computer network applications have penetrated into everyone's work and life, and people mostly use browsers to collect knowledge and resources when surfing the Internet.
1.Web
Web is the abbreviation of World Wide Web, and the Chinese name is Wanweiwang. It is a network
information service system for publishing, browsing and querying information.
Web also has the meaning of webpage in webpage design. Webpage is usually in HTML format, which needs to be read through a web browser. Webpage
is the basic element of a website and a platform for carrying various website applications.
(1) Web development history
The update and improvement of the Web is mainly based on the continuous development of Web technology. The Web application architecture was proposed by the British
Tim Bemers-Lee in 1989. In November 1990, the first Web server rxoc01 .cem.ch goes live.
First appearance of the graphical web browser developed by Tim Berners-Lee.
(2) Browser configuration
The WWW browser is a necessary tool software for accessing ihterret. Among the many WWW browsers, users use
Microsoft's irternet Explorer (E) browser and Mozilla Fvrelox browser, and users can use them to browse the homepage
.Search information . Download files, send and receive email, and more.
1) Configuration of Edge browser
On the right side of the browser... settings can be configured for some basics
privacy setting
browser personalization
shared copy
System and optimization settings
2) Firefox browser configuration
The Chinese name of Firefox is Firefox, which is a browser jointly developed by the Mozilla Foundation and open source groups. The Firefox browser needs to be
downloaded and installed.
four bars on the right
enter settings
Make some general settings here
Security and Privacy
Extensions and Themes
3. Email
Electronic component service is one of the important services in the current har. Hundreds of millions of people send and receive e-mails on the internet every day.
1. History of E-mail Development
There are two versions about the world's first email,
The first is a brief message from computer scientist Professor Leonsard Kleinrock to his colleagues in October 1969.
The second argument is that in 1971, the U.S. Department of Defense funded ARPAnet. In order to share the research results of scientists in different places, Dr. Ray Tomlinson of the Massachusetts Institute of Technology combined a software that can be replicated between different computer networks and A single-machine-only communication software was incorporated. As a test, he used this software to send the first e-mail on the ARPAnet, to another computer of his own.
Although e-mail was invented in the 1970s, it only emerged in the 1980s, mainly because there
were too few people using ARPAnet at that time, and the network speed was only 1/20 of the standard network speed of 56kbit/s. Due to speed constraints, users cannot send
large data files such as pictures, but can only send simple text messages. In the mid-1980s, personal computers gradually integrated into people's
lives, and e-mail began to spread widely.
2. Send and receive email online
1) Application email
To send and receive e-mail on the Internet, you must first have an e-mail address. Many websites (such as Sohu, Sina, Netease, etc.)
provide free e-mail service. The following uses Netease 163 free e-mail as an example to introduce the process of applying for an e-mail.
First enter in the Edge browser
Choose to register a new account
Enter email address, password, phone number
- Enter the desired email address in the "Email Address" text box. It is recommended to use an email address related to your own name or work, which is more convenient to use. Next, fill in other relevant information as required, including email password, etc. The content with '* is required.
- Because of the national real-name system policy, mobile phone authentication is required, fill in the mobile phone number, receive the verification code,
- After filling in the relevant information, click the "Register Now" button, and then follow the system prompts to successfully apply for an email address.
- Sending and receiving emails online After applying for a mailbox, you can use your own mailbox to send and receive emails. The following describes the process of sending and receiving emails online.
- Just log in
Creation is not easy, please pay attention, like, collect, thank you~