That depends on several things. The recording resolution, the video codec/ compression, frame rate per second [fps], and the number of cameras you’re using. However, each IP camera performs best at an internet speed of about 2/ 2.5Mbps.To use four high-quality cameras, you’ll thus need an internet speed of at least 10Mbps. And if you have 16 cameras, a rate of 35Mbps will be enough.