What distinguishes dial-up internet access?

• A. It requires high-speed fiber optic cables
• B. It uses public switched telephone network to connect to ISP
• C. It operates exclusively over coaxial cables
• D. It provides WiFi service to multiple devices

Answer: (B)

Dial-up internet access is distinguished by its use of the public switched telephone network (PSTN) to connect to an Internet Service Provider (ISP). This method involves the use of a modem, which converts digital data from a computer into analog signals that can be transmitted over standard telephone lines. When a user wants to access the internet, the modem dials a phone number associated with the ISP, establishing a connection.

This technology is considered quite slow compared to modern broadband options as it operates at speeds typically ranging from 56 Kbps to 128 Kbps. Its reliance on existing telephone infrastructure is what differentiates it from other technologies that use high-speed fiber optic cables or coaxial cables. Furthermore, dial-up does not offer WiFi service, as it connects a single device at a time directly through the phone line rather than providing a wireless network for multiple devices.