What is the "cat" surfing the Internet?

The "cat" surfing the Internet is a modem, and people affectionately call it "cat" according to the homonym of the modem. Modem is a kind of computer hardware, which is a device that converts digital signals into analog signals by modulation at the sending end and then converts analog signals into digital signals by demodulation at the receiving end.

It can translate a computer's digital signal into an analog signal that can be transmitted along an ordinary telephone line. These analog signals can be received by another modem at the other end of the line and translated into a language that the computer can understand. This simple process completes the communication between two computers.

Mode of transmission: Modem was originally used only for data transmission. However, with the increasing demand of users and fierce competition among manufacturers, there are more and more "two-in-one" and "three-in-one" modems in the market. These modems can not only transmit data, but also have fax and voice transmission functions.

Fax modem: You don't need to print the documents directly from the computer to the other party's computer or fax machine. Besides saving the cost of a special fax machine, there are many benefits.

You can save or edit the received fax conveniently; It can overcome the problem that the handwriting gradually fades due to the use of thermal paper in ordinary fax machines; Because the Modem adopts error correction technology, the fax quality is better than that of ordinary fax machines, especially graphic fax machines.