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Network and IP Video 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 Network and IP Video flashcards as text

  1. What is 'substream' or 'secondary stream' functionality in an IP camera?

    Answer: A lower-resolution stream used for live view while the main stream records

    Dual-streaming lets the camera send a lower-resolution substream for live monitoring while simultaneously recording the full-resolution main stream.

  2. Which cybersecurity practice is MOST critical when deploying IP cameras on a network?

    Answer: Changing default usernames and passwords on every device

    Default credentials are the leading attack vector for IP cameras; changing them immediately is the single most critical security step.

  3. What does 'bitrate' measure in an IP video stream?

    Answer: The amount of data transmitted per unit of time

    Bitrate measures the volume of data (bits) transmitted per second, directly affecting video quality and bandwidth consumption.

  4. In IP camera networking, what is a 'managed switch' primarily used for compared to an 'unmanaged switch'?

    Answer: Managed switches allow configuration of VLANs, QoS, and port mirroring

    Managed switches offer advanced configuration options like VLANs, QoS prioritization, SNMP monitoring, and port mirroring that unmanaged switches lack.

  5. Which compression technique does H.264 use to reduce file size by only encoding changes between frames?

    Answer: Inter-frame compression using P-frames and B-frames

    H.264 uses inter-frame compression with P-frames (predicted) and B-frames (bi-directional) that store only the differences from reference frames.

  6. A customer wants to access their IP camera system remotely over the internet. Which solution provides the most secure access?

    Answer: Use a VPN tunnel to the site network

    A VPN tunnel encrypts all traffic between the remote user and the site network, avoiding the exposure of camera ports directly to the internet.

  7. What is the purpose of Network Time Protocol (NTP) in an IP camera system?

    Answer: Synchronize camera clocks for accurate timestamps on recorded footage

    NTP synchronizes all cameras and recording devices to the same accurate time, ensuring timestamps are consistent and legally defensible.