Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about the methods of accessing internet. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

The commonly used internet access methods are telephone line dial-up access (PSTN), ISDN, ADSL access, HFC (CABLEMODEM), optical fiber broadband access, passive optical network (PON), wireless network, power network access (PLC) and so on.

1. Telephone line dial-up access (PSTN)

A common narrowband access method for home users to access the Internet. That is, through the telephone line, using the access number provided by the local operator, dial-up access to the Internet, the rate does not exceed the 56Kbps. It is easy to use and can be connected with an effective telephone line and a PC with its own modem (MODEM). Used in some low-speed network applications, it is mainly suitable for temporary access or no other broadband access places. The disadvantage is that the rate is low, can not achieve some high-speed network services, followed by the high cost.

2 、 ISDN

Commonly known as "one-line connection". Using digital transmission and digital switching technology, telephone, fax, data, image and other services are integrated in a unified digital network for transmission and processing. Using an ISDN subscriber line, users can make phone calls and send and receive faxes while surfing the Internet, just like two telephone lines.

3. ADSL access

The most widely used copper wire access method. ADSL can directly use the existing telephone lines to transmit digital information through ADSLMODEM. The theoretical rate can reach the downlink of 8Mbps and the uplink of 1Mbps, and the transmission distance can reach 40.5 km. The ADSL2+ rate can reach 24Mbps downlink and 1Mbps uplink.

4. HFC (CABLEMODEM)

It is a kind of access method based on copper wire resources of CATV network. It has the connection characteristic of special line to access the Internet, which allows users to access the Internet at high speed through CATV network. It is suitable for families, individuals or small and medium-sized groups with cable television networks. It is characterized by high speed, convenient access (transmitting data through cable without wiring), and can realize all kinds of video services, high-speed download and so on.

5. Optical fiber broadband access

Through the optical fiber access to the community node or corridor, and then connected to each shared point by the network cable to provide high-speed interconnection access to a certain area. It is characterized by high speed, strong anti-interference ability, suitable for families, individuals or all kinds of enterprises and institutions, and can achieve all kinds of high-speed Internet applications (video service, high-speed data transmission, remote interaction, etc.). The disadvantage is that the cost of one-time wiring is high.

These are the ways to access internet shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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