IP Camera & PoE Networking Flashcards

Which H.264 profile is most commonly used in IP cameras to balance compression efficiency and hardware compatibility?

Answer: High Profile

High Profile provides the best compression efficiency and is widely supported by modern IP cameras and NVRs for surveillance applications.

A PoE switch has a total power budget of 120W with 8 ports. All 8 cameras draw 15W each. What happens when the 8th camera is connected?

Answer: The 8th camera does not receive PoE power

When total demand (8×15W=120W) reaches the switch's power budget, the last connected device may be denied power depending on port priority settings.

What does the term 'codec' refer to in IP camera video transmission?

Answer: The algorithm that compresses and decompresses video data

A codec (coder-decoder) is the algorithm that compresses video for transmission and decompresses it for playback, such as H.264 or H.265.

Which IP camera resolution is referred to as '4MP'?

Answer: 2688×1520 pixels

4MP typically refers to 2688×1520 resolution (approximately 4 megapixels), commonly used in surveillance cameras.

A network switch is configured with 802.1Q VLAN tagging. What is the function of the 'native VLAN' on a trunk port?

Answer: It handles untagged frames received on that trunk port

The native VLAN on an 802.1Q trunk port carries untagged frames; any untagged traffic is assigned to the native VLAN by default.

What is the primary advantage of using H.265 (HEVC) over H.264 for IP camera storage?

Answer: H.265 requires approximately 50% less storage for equivalent quality

H.265 achieves approximately 50% better compression than H.264 at the same visual quality, significantly reducing storage requirements.

When configuring a static IP address on an IP camera, which four parameters are typically required?

Answer: IP address, subnet mask, default gateway, DNS server

Static IP configuration requires at minimum an IP address, subnet mask, default gateway, and DNS server to enable network communication.