There are two type of CCTV camera servers
DVR is a system for CCTV camera that needs a analog to record videos. For an analog CCTV camera, when installing the camera system the DVR which might be timely and hectic procedure including many jumbles of wires and countless instances where there is a chance of electrocuted.For analog CCTV camera the feed can be only viewed from a monitor connects to the DVR. Analog CCTV cameras can also be accessed remotely over the internet through the DVR but the procedure is not as efficient as IP cameras.
NVR is a system for that can be stream over a ip address we call it IP camera. With NVR it makes IP camera is greater in efficiency and it can be said that an IP camera is sharper in its performance than a analog CCTV IP camera relatively easy to install and use. The IP camera sends video feed to an IP address and hence the video feed would be accessible to any part of the house or the building where there is internet.
both NVR and DVR can be considered as local cloud server
Local cloud server can give us large amount of storage space with a one time payment but we need to upgrade it with physical hardware and infrastructure. It give us physical control over your backup and Keeps critical data in-house. No third party has access to your information, but needs space in your home/office for a rack or server room/closet, in addition to dedicated IT support. No internet needed
Internet cloud server its storage can be upgrade at anytime but it maybe costly and the costs of the data recovery could be expensive too, small companies may not benefit from this. Backup and restore can be done from anywhere, using any computer, tablet, or smartphone. But it needs the internet or else you won’t have access to any of your information, it may cost a lot if you are using data