What of the following names is a USB device that registers itself as a network adapter but is a covert systems administration and penetration testing tool?

What of the following names is a USB device that registers itself as a network adapter but is a covert systems administration and penetration testing tool?

• NET Ninja
• BeamGun
• Rubber Ducky
• LAN Turtle 

EXPLANATION

The LAN Turtle is a covert Systems Administration and Penetration Testing tool providing stealth remote access, network intelligence gathering, and man-in-the-middle monitoring capabilities.
Housed within a generic "USB Ethernet Adapter" case, the LAN Turtle’s covert appearance allows it to blend into many IT environments.
See: https://lanturtle.com/ for more information

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What of the following names is a USB device that registers itself as a network adapter but is a covert systems administration and penetration testing tool?

What of the following names is a USB device that registers itself as a network adapter but is a covert systems administration and penetration testing tool?

• BeamGun
• LAN Turtle
• NET Ninja
• Rubber Ducky 

 

EXPLANATION

The LAN Turtle is a covert Systems Administration and Penetration Testing tool providing stealth remote access, network intelligence gathering, and man-in-the-middle monitoring capabilities.
Housed within a generic "USB Ethernet Adapter" case, the LAN Turtle’s covert appearance allows it to blend into many IT environments.
See: https://lanturtle.com/ for more information

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In video surveillance cameras, what could be said is the most likely % of data space efficiency when using H264 over MJPEG?

In video surveillance cameras, what could be said is the most likely % of data space efficiency when using H264 over MJPEG?

• H264 uses around 10% of data space compard to MJPEG.
• H264 can use 10% to 90% of data space compared to MJPEG.
• H264 uses around 90% of data space compared to MJPEG.
• They would both use around the same amount of data space. 

EXPLANATION

It is more logical to say H264 has a range of efficiency over MJPEG than a set % of data space used (bandwidth and storage) because the efficiency of H264 over MJPEG depends on a lot of variables. MJPEG takes a full picture for every frame. H264 uses temporal compression, where 1 full frame is taken at intervals ("I frame"), with in between frames broken up in grid like sectors ("P frames" and "B frames"), and only those sectors that have activity in them are recorded. So if the camera is pointed at an all white wall with no motion going on, then there is very little data being recorded in the P and B frames because there is very little change in the scene. But if the scene is, for example, outdoors looking at a busy intersection with tress constantly swaying in the wind, each frame will have lots of differences so there will be much more sectors recorded in the B and P frames. That's why estimating bandwidth and storage for H264 recorded video is a "best guess" that can vary a lot depending on scene being recorded.
Along with the citation, also see....
IPVM: Bandwidth Basics for IP Cameras
https://www.youtube.com/watch?v=8ATxwkwjJho
SIW: Choosing the right video surveillance compression
http://www.securityinfowatch.com/article/10514588/choosing-the-right-video-surveillance-compression

SOURCE

https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Design

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In video surveillance, what is the prevalent basic method of motion detection most cameras or recorders use to detect motion and usually comes free with the product.

In video surveillance, what is the prevalent basic method of motion detection most cameras or recorders use to detect motion and usually comes free with the product.

• Video Analytics to recognize a person.
• Pixel changes in the image.
• Thermal imaging.
• Passive Infrared (PIR).             

EXPLANATION

At the most basic level, most video surveillance cameras and recorders use pixel changes to determine if motion is occurring in the image, usually by the percentage they change and/or amount of contrast change. Thermal imaging is a small percentage of use and in most cases it's not the detection of heat being used, but again the pixel changes in the image that is used. Video Analytics is an advanced form of motion detection that not only detects pixel changes, but also analyzes those shapes to intelligently determine for example if it is a person in the scene vs. a car, animal or bush swaying in the wind, but comes at a premium price, usually as a license fee or if embedded in the camera, then at a premium price attached to the camera, and is not the prevalent form of video motion detection used since it does not come free or at a cheap price with systems sold. Passive infrared (PIR) sensors are common in security, but they have nothing to do with the image the camera sees. Even with cameras that have built in PIR sensors, the sensor detects infrared energy but has nothing to do with analyzing the image.
Video Motion Detection
http://www.cctv-information.co.uk/i/Video_Motion_Detection

Home Eye on Video: Pixel-based intelligent video

http://www.securityinfowatch.com/article/10547228/eye-on-video-pixel-based-intelligent-video
Video content analysis
https://en.wikipedia.org/wiki/Video_content_analysis

Sony Intelligence Video Analytics - Distributed Enhanced Processing Architecture (DEPA)

http://images.synnex.com/images_ca/images/communities/technology_solutions/images/vendors/documents/...

Patent US 8571261 B:System and method for motion detection in a surveillance video

US 8571261 B2

https://www.google.com/patents/US8571261

Passive infrared sensor
https://en.wikipedia.org/wiki/Passive_infrared_sensor

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