ANVE Exam Results

To calculate the storage required to record one hour of video from two cameras streaming at 6 Mbit/s each, we use the following steps:

Total bitrate for both cameras: 6 Mbit/s×2=12 Mbit/s6 \text{ Mbit/s} \times 2 = 12 \text{ Mbit/s}6 Mbit/s×2=12 Mbit/s

Convert Mbit/s to Mbyte/s: 12 Mbit/s÷8=1.5 Mbyte/s12 \text{ Mbit/s} \div 8 = 1.5 \text{ Mbyte/s}12 Mbit/s÷8=1.5 Mbyte/s

Calculate the total data for one hour: 1.5 Mbyte/s×3600 seconds=5400 Mbytes1.5 \text{ Mbyte/s} \times 3600 \text{ seconds} = 5400 \text{ Mbytes}1.5 Mbyte/s×3600 seconds=5400 Mbytes

Convert Mbytes to Gbytes: 5400 Mbytes÷1024=5.27 Gbytes5400 \text{ Mbytes} \div 1024 = 5.27 \text{ Gbytes}5400 Mbytes÷1024=5.27 Gbytes

Approximately, the storage required is 5.4 GB.

“The interval between two I-frames (intra-coded frames) in a compressed video stream is called the Group of Pictures (GOP). The GOP defines how many frames are between full image frames and is a key concept in video compression.”

— Axis Communications Academy, Network Video Fundamentals, 2022

“A GOP (Group of Pictures) consists of one I-frame followed by a series of P-frames and B-frames, until the next I-frame appears.”

— Axis Web Article: Video Compression

"An IR-pass filter blocks visible light and allows only infrared light to reach the camera sensor. This is commonly used for dedicated infrared imaging applications."

— Axis IR Filter Technologies

"An IR-cut filter, by contrast, blocks infrared light and lets visible light through."

— Axis Communications Academy, Network Video Fundamentals, 2022

IP subnets and VLANs are commonly used network features to prevent unauthorized access to the surveillance network. By segmenting the network using IP subnets, different portions of the network can be isolated, reducing the risk of cross-network attacks. VLANs (Virtual Local Area Networks) further enhance security by creating separate broadcast domains within the same physical network, thereby isolating surveillance devices from other network traffic and improving overall network security and performance.