IP Cameras and Network Video Recorders NVRs. It is a whole new level of surveillance with IP Cameras and NVRs. There is no need to connect every single camera with dedicated cable to DVR. With IP Cameras you can use existing local network and even internet to install cameras locally and in remote locations. Video Compression at a Camera Level now allows much higher resolutions to be transmitted and recorder over a single Ethernet cable. Use of network switches made sending a picture from several cameras via one Ethernet cable or fiber optic wire possible. Megapixel resolutions, not available with analog cameras, can now be achieved on surveillance systems.