CCTV Network and IP Video 2 — Questions and Answers
Question 1: What does ONVIF stand for in the context of IP camera systems?
- Open Network Video Interface Forum (Correct answer)
- Optical Network Video Integration Framework
- Online Network Video Interoperability Foundation
- Open Node Video Interface Function
Correct answer: Open Network Video Interface Forum
ONVIF stands for Open Network Video Interface Forum, a global standard that ensures interoperability between IP-based security products.
Question 2: Which protocol is most commonly used to stream live video from an IP camera to a VMS?
- FTP
- RTSP (Correct answer)
- SNMP
- DHCP
Correct answer: RTSP
RTSP (Real-Time Streaming Protocol) is the standard protocol for delivering live video streams from IP cameras to video management systems.
Question 3: A network switch's PoE budget is 150W and each camera draws 15W. What is the maximum number of cameras it can power simultaneously?
- 5
- 8
- 10 (Correct answer)
- 15
Correct answer: 10
Dividing the total PoE budget (150W) by the per-camera draw (15W) gives a maximum of 10 cameras.
Question 4: Which VLAN configuration best practice isolates IP camera traffic from general corporate network traffic?
- Place cameras on the default VLAN 1
- Assign cameras to a dedicated security VLAN (Correct answer)
- Disable VLANs and use a flat network
- Use the management VLAN for all camera traffic
Correct answer: Assign cameras to a dedicated security VLAN
Assigning cameras to a dedicated security VLAN segments surveillance traffic from corporate data, improving both security and performance.
Question 5: What is the primary function of a Network Video Recorder (NVR)?
- Encode analog video signals to digital
- Receive, decode, and store IP camera streams (Correct answer)
- Provide PoE power to connected cameras
- Translate ONVIF profiles to analog output
Correct answer: Receive, decode, and store IP camera streams
An NVR receives IP video streams over the network, decodes them, and stores the footage to disk.
Question 6: What does the 'H' in H.265 video compression standard refer to?
- High-efficiency
- Hybrid
- Horizontal
- H stands for the ITU-T recommendation series (Correct answer)
Correct answer: H stands for the ITU-T recommendation series
H.265 belongs to the ITU-T 'H series' of recommendations covering audiovisual and multimedia systems.
Question 7: Which IP camera feature allows the camera to continue recording locally when network connectivity to the NVR is lost?
- SD card edge storage (Correct answer)
- PoE passthrough
- RTSP multicast
- ONVIF Profile S
Correct answer: SD card edge storage
SD card edge storage lets the camera record footage to an onboard memory card when the network or NVR is unavailable.
CCTV Network and IP Video 2
What does ONVIF stand for in the context of IP camera systems?