Answer: 1) The difference between the specific HDMI extender and the HDMI IP extender is a key point, but the router or switch, the HDMI extender one-sending and one-receiving single network cable The longest signal transmission process does not exceed 200M. The HDMI IP extender can send and receive more than once. Through the router or switch, at most one can transmit TX, and the 254 receiving end RX signal can be transmitted at the same time; 2) The multi-broadband wire with ip protocol is inside, which can realize the ip dialing function, eliminating the need for network cables. The use of; without the ordinary can only transmit images and sounds.