Video Recording and Storage Flashcards
7 cards from real CCTV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Video Recording and Storage flashcards as text
What is the primary risk of storing all CCTV footage solely in the cloud?
Answer: Dependence on continuous internet connectivity and upload bandwidth
Cloud-only storage requires a reliable, high-bandwidth internet connection; an outage or bandwidth bottleneck will cause recording gaps.
Which recording mode uses the least storage while still capturing security-relevant events?
Answer: Motion-triggered recording
Motion-triggered recording only saves footage when activity is detected, dramatically reducing storage use compared to continuous recording.
What does 'forensic integrity' mean when handling CCTV recordings as evidence?
Answer: Preserving the original file unaltered and documenting the chain of custody
Forensic integrity requires that original recordings remain unmodified and that every person who accessed them is documented to ensure admissibility in court.
A security manager wants to reduce storage costs without shortening the 30-day retention period. What is the best approach?
Answer: Lower the recording resolution and frame rate during low-activity hours
Reducing resolution and frame rate during non-peak periods lowers daily data volume, maintaining the same retention window at lower storage cost.
What is 'intelligent video analytics' (IVA) storage, and how does it differ from raw video storage?
Answer: IVA stores only metadata and event flags rather than full video streams
IVA can store structured metadata (object types, trajectories, events) separately, allowing fast searches without replaying raw video.
Why should CCTV recorders be protected by an uninterruptible power supply (UPS)?
Answer: To prevent hard drive corruption and recording gaps caused by sudden power loss
A sudden power cut during a write operation can corrupt the hard drive file system or lose in-buffer footage; a UPS provides time for a graceful shutdown.
What is the significance of a recorder's 'total throughput' or 'recording bandwidth' specification?
Answer: It sets the upper limit on the combined data rate from all cameras the recorder can handle simultaneously
Total throughput (e.g., 80 Mbps) is the aggregate incoming data rate ceiling; exceeding it causes dropped frames or recording failures across cameras.