Certified Information Systems Security Professional (CISSP) Practice Exam

The statement that cable modems provide access to the Internet Service Provider (ISP) via coaxial cable is indeed correct. Cable modems operate by utilizing coaxial cables, which are commonly used in cable television systems, to transmit data over the same infrastructure that delivers cable TV. This allows cable modems to provide broadband internet access to users by modulating and demodulating signals, converting digital data from a computer into a format suitable for transmission over the coaxial network and vice versa.

The other options create confusion regarding the function and infrastructure of cable modems. For instance, they do not require a telephone line, as they leverage coaxial cabling instead. While they are sometimes compared to technologies like fiber optics, they are not typically used in fiber-optic networks, which rely on different types of transmission mediums and technologies. Moreover, cable modems are designed specifically for data communication rather than being used exclusively for TV signal transmission, even though they may share the same cabling infrastructure. Thus, the nature of cable modem technology fundamentally supports the assertion that they provide access to the ISP via coaxial cable.