Is HFC transmission rate dedicated or shared among users?

Full Problem is:

Is HFC transmission rate dedicated or shared among users? Are collisions possible in a downstream HFC channel? Why or why not?

Solutions of this problem:

Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable.

 It has been commonly employed globally by cable television operators since the early 1990s. In a hybrid fiber-coaxial cable system, the television channels are sent from the cable system's distribution facility, the headend, to local communities through optical fiber subscriber lines.

At the local community, a box called an optical node translates the signal from a light beam to electrical signal, and sends it over coaxial cable lines for distribution to subscriber residences. The fiberoptic trunk lines provide adequate bandwidth to allow future expansion and new bandwidth-intensive services.

Come to solution:

HFC bandwidth is shared among the users.

On the downstream channel, all packets emanate from a single source, namely, the head end. Thus, there are no collisions in the downstream channel.


Tags: Computer Networking Solutions, What is HFC, HFC transmission rate, Are collisions possible in a downstream HFC channel,