343 Mbps cable modem provides very fast Internet over cable by connecting modem's 10-100-1000 Ethernet port to your computer or router Data throughput will be reduced by network overhead.Delivered data speeds are also dependent upon the configuration and capacity of the data-over-cable service on which the 5345 is used.Owning this cable modem eliminates modem rental charges (typically $8 to $10 every month) from Comcast XFINITY and Time Warner Cable along with other cable service providers This 8x4 cable modem has eight downstream channels (four more than 4x4 cable modems) and gives higher average download speeds than 4x4 modems even when the service speed is below this cable modem's top speed of 343 Mbps