What are the ways to access the internet?
Commonly used Internet access methods include telephone line dial-up access (PSTN), ISDN, ADSL access, HFC (CABLE MODEM), optical fiber broadband access, passive optical network (PON), wireless Network, power grid access (PLC), etc.
1. Dial-up telephone line 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 56Kbps. It is characterized by ease of use, requiring only a valid telephone line and a PC with its own modem (MODEM) to complete the access. It is used in some low-speed network applications and is mainly suitable for temporary access or use in places without other broadband access. The disadvantage is that the speed is low and some network services with high speed requirements cannot be realized. Secondly, the cost is high.
2. ISDN
is commonly known as “one line”. Using digital transmission and digital switching technology, multiple services such as telephone, fax, data, and images are integrated into a unified digital network for transmission and processing. Users can use an ISDN subscriber line to make 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 existing telephone lines to transmit digital information through ADSL MODEM. The theoretical rate can reach 8Mbps downlink and 1Mbps uplink, and the transmission distance can reach 4 to 5 kilometers. ADSL2 speed can reach 24Mbps downlink and 1Mbps uplink.
4. HFC (CABLEMODEM)
is an access method based on copper wire resources of the cable TV network. It has the connection characteristics of dedicated line Internet access, allowing users to achieve high-speed access to the Internet through the cable TV network. Suitable for families, individuals or small and medium-sized groups with cable TV networks. It is characterized by high speed, convenient access method (data transmission through wired cables, no wiring required), and can realize various video services, high-speed downloads, etc.
5. Optical fiber broadband access
Access to community nodes or corridors through optical fiber, and then connect to each sharing point through network cables to provide a certain area high-speed Internet access. It is characterized by high speed and strong anti-interference ability. It is suitable for families, individuals or various enterprises and institutions. It can realize various high-speed Internet applications (video services, high-speed data transmission, remote interaction, etc.). The disadvantage is the one-time wiring cost. higher.
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