With their high speed, low cost, and wide availability, Cable Modems offer an "always-on" connection over the same lines used to provide Cable television services. Even if you don't subscribe to Cable TV, your provider can still hook you up to the internet although the monthly cost will usually be higher.
Speed consistency has always been the Achilles heal of Cable internet access. Since many users are sharing the same connection, the speed can drop off quite noticeably during peak usage hours. The amount of degradation is dependant upon the provider's cable infrastructure and how well the speeds are managed. Some Cable providers invest large sums of money to ensure that their infrastructure keeps pace with increasing demand, while others try to conserve money by overloading their existing systems.
All Cable providers limit the speed at which subscribers can access their systems. Typically the average speed range is somewhere between 128kbs-256kbs for uploads, and 768kbs-1.5mbs+ for downloads. Cable internet access is available in most areas serviced by Cable television providers.
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