CATV, or Community Antenna Television, was originally developed to provide improved TV signals by sharing antennas and satellite dishes. It used coaxial cable to transport the TV signals to each subscriber. Current systems typically use a combination of fiber and coaxial. When both fiber and coaxial cables are used, the system is referred to as a hybrid fiber-coaxial (HFC) network.
Broadband cable uses frequency-division multiplexing (FDM) to deliver data over a radio frequency (RF) network. Cable provides relatively inexpensive high-speed Internet access that supports analog and digital video, voice, and data. Its downsides include possible bandwidth and security issues because it is a shared medium. The provider can increase bandwidth by using smaller service areas and more channels. Security can be addressed by the user within the cable modem or with an onsite router.
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