CCTV Network and IP Video 4

Question 1

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

Accepted Answer

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

Answer

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

Question 2

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

Accepted Answer

Changing default usernames and passwords on every device

Answer

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

Question 3

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

Accepted Answer

The amount of data transmitted per unit of time

Answer

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

Question 4

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

Accepted Answer

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

Answer

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

Question 5

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

Accepted Answer

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

Answer

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

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV Network and IP Video 4