Network video recorder (NVRs) are to network video transmitters and cameras what DVRs are to conventional CCTV systems. An NVR can receive multiple video signals from multiple cameras over a network connection and record them on a hard drive. The video comes in the NVR's Ethernet connection to the network or Internet. NVRs are available as complete units and as software only.

A technique for transferring data such that it can be processed as a steady and continuous stream. Streaming technologies are becoming increasingly important with the growth of the Internet because most users do not have fast enough access to download large multimedia files quickly. With streaming, the client browser or plug-in can start displaying the data before the entire file has been transmitted.

1. Hot-swappable disks
2. Simple Network Management Protocol (SNMP) support
3. Built-in diagnostics (much beloved of IT Managers)
4. Protection of files against deletion (whether accidental or otherwise)
5. In-built firewall for the protection of data against unauthorized access,
6. File export function which embodies the watermarking and digital signature based on individual video frames and audit trail for security
7. Synchronized audio and video recording and playback
8. Hard-disk temperature monitoring
9. Dual, fully redundant power supplies and network connections, the latter providing uninterrupted and continued operation in the event of a single power supply or network failure.