Practice Test Geeks(CST) Certified Surveillance Technician Practice Test
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IP Camera & PoE Networking Flashcards

7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 IP Camera & PoE Networking flashcards as text

  1. A technician uses a PoE tester and finds that a camera port shows 'data only' with no power output. What is the most likely cause?

    Answer: The switch port has PoE disabled or the power budget is exhausted

    A port showing data but no power typically indicates PoE is administratively disabled or the switch's total power budget is already consumed.

  2. What is the function of DHCP snooping on a switch where IP cameras are installed?

    Answer: It prevents rogue DHCP servers from assigning unauthorized IP addresses

    DHCP snooping validates DHCP messages and blocks offers from unauthorized DHCP servers, protecting cameras from receiving incorrect addressing.

  3. An IP camera's video stream exhibits high latency and frame drops. Network testing shows 15% packet loss on the link. What is the first step to resolve this?

    Answer: Inspect and replace the Ethernet cable or connector

    Packet loss at 15% strongly indicates a physical layer problem such as a damaged cable, bad crimp, or faulty connector that should be inspected first.

  4. Which port number is the default for HTTPS access to an IP camera's web interface?

    Answer: 443

    HTTPS uses port 443 by default, providing encrypted access to the camera's web-based management interface.

  5. What does WDR (Wide Dynamic Range) accomplish in an IP camera?

    Answer: Balances exposure to capture detail in both bright and dark areas simultaneously

    WDR technology combines multiple exposures to produce a single image with visible detail in both bright and shadowed areas of the same frame.

  6. A CST technician segments camera traffic on VLAN 20 and workstation traffic on VLAN 10. What additional device is required for the NVR on VLAN 20 to send alerts to the security workstation on VLAN 10?

    Answer: A router or Layer 3 switch to perform inter-VLAN routing

    Communication between different VLANs requires a router or Layer 3 switch to route packets between the isolated network segments.

  7. What is the purpose of port forwarding on a router in an IP camera installation?

    Answer: To allow external remote access to cameras through the router's public IP

    Port forwarding maps an external port on the router's public IP to an internal device's IP and port, enabling remote access to cameras from outside the LAN.