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The only downside of cable Internet is that it's a "best effort" technology, and you may actually be getting less bandwidth than what you think because it's a shared medium. Your actual bandwidth is dependent on what everybody else is doing. That said, you do get a lot of speed at an affordable price, and if your needs aren't particularly heavy and you aren't running sensitive apps that require a guarantee against latency, cable's an option that will fall into the "good enough" category. But, if guaranteed throughput is high on your priority list, you'll need to look for a T1 or T3 solution.