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TechKnowSurge Catalog Interactives Signal Blocking or Surveillance?
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Signal Blocking or Surveillance?

Signal blocking, wireless surveillance, network monitoring, or video? Choose what fits each need.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

Signal blocking stops signals going where we do not want them. Someone could plug a device into the network and send stolen data out over wireless; blocking certain ranges, or all of them, stops that, whether it is Wi-Fi or RFID. A Faraday box or cage blocks signals strong enough to damage equipment, such as the pulse from an EMP. Surveillance is close observation. Electronic surveillance watches the electronics: on the network, it means seeing what is communicating and what is going on. Wireless surveillance watches the airwaves. In the lesson, a Cisco CleanAir system used the access points, placed on a floor map, to triangulate where an interferer was, such as a microwave oven or a cordless phone on 2.4 GHz, and even to recognize what it was. Video surveillance records what happens in and around the building, and people who know it is there are less likely to break in. Systems differ: some run over wireless, some use special cabling, and some store footage on site and some offsite. To sort a card, ask whether the need is to stop a signal, to find something in the airwaves, to see what the network is carrying, or to see people.

What you'll learn

Aligned to

CompTIA Security+
1.2 Summarize fundamental security concepts.
4.1 Given a scenario, apply common security techniques to computing resources.
4.4 Explain security alerting and monitoring concepts and tools.

Key terms

Faraday Cage
A shielded enclosure made of conductive material that blocks electromagnetic signals, used to protect equipment from damaging radio frequency events and prevent wireless data exfiltration.
Data Exfiltration
The unauthorized transfer of data from a system to an external destination.
Electronic Surveillance
The monitoring of electronic devices and network communications to observe activity and detect suspicious or unauthorized behavior.
Triangulation
A method used by wireless site survey systems to determine the location of an RF interference source by calculating its position based on signal data from multiple access points.
RF Interference
Unwanted radio frequency signals from external devices that disrupt or degrade wireless network communication.
Video Surveillance
The use of cameras and recording systems to monitor physical spaces, deter unauthorized access, and document activity within or around a facility.

Topics

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