Fault Tolerance and Reliability - IP vs Analog

IP - While some IP cameras can store limited amounts of video internally, network failure will result in losing all live viewing and the recorded server video. Attempts to limit exposure to network faults by use of complex Layer 3 switches, redundant networks, etc.,increases costs and management significantly. Networks can also become
infected with viruses or other malware, with catastrophic results. IP cameras are network appliances and as they are devices requiring management are less reliable.

Analog - Analog devices are limited to failures of the individual cameras or the individual devices at the point of concentration and as such the loss of a single piece of hardware will not cause a substantial degradation of the system. The
video transmission is typically a “passive” connection, and once installed, requires virtually no maintenance. Analog cameras are very mature and have a long track record for reliability.

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