WIRELESS DAY 1 Flashcards
Connect widely separated networks via multiplexed channels.
Regional to global connections.
Wireless Wide Area Networks (WWAN)
Networks which include implants and wearable devices.
Typical coverage up to 1 meter.
Wireless Body Area Network (WBAN)
Groups of dedicated sensors to monitor and record their environment.
Typically low-power/short-range communications deployed in mesh architecture .
10-20 meters between sensors
Can have thousands of sensors
Wireless Sensor Networks (WSN)
Home and office networks. Most common protocol is Wi-Fi.
Typical coverage up to 100 meters.
Wireless Local Area Network (WLAN)
Wireless connection of peripheral devices via Bluetooth, ZigBee, Z-Wave, etc.
Typical coverage area up to 10 meters.
Wireless Personal Area Networks (WPAN)
Dedicated communication channels leased to customers by service providers.
City-sized networks. Typical range up to 30 miles.
Wireless Metropolitan Area Networks (WMAN)
Provides access to the radio frequency (RF) physical layer.
Radio Adapter
Houses CPU, GPU, display and video processors, cellular modems, and other hardware functionality.
System-on-a-Chip (SoC)
Functions as primary input device on many mobile devices.
Display
Comes in the form of RAM memory and Flash memory.
Storage
Examples of common sensors:
accelerometer, gyroscope, digital compass, ambient light sensor, and proximity sensor.
Three components of the camera.
sensor, lens, and image processor
Antenna constructed of a loop of wire
NFC/RFID Antenna
Cellular antenna on mobile devices capable of receive-only functionality
Diversity Cellular Antenna
Examples of Semi-directional Antenna
Patch/Panel, Yagi, or Sector
Examples of omnidirectional Antenna
Dipole or Whip
Highly focused beam for long-range communication up to 30-miles
Most amount of gain
Highly-directional
2 or 4 of these antenna are present on mobile devices
Cellular Antennas
Receive-only antenna used to determine physical location
GPS Antenna
Examples of a highly-directional Antenna
Parabolic Dish or Grid
Cellular antenna on mobile devices capable of two-way communications
Primary Cellular Antenna
Provide 360 degree coverage around the axis of the antenna
Least amount of gain
omnidirectional
Provides coverage in a beam pattern less than 120 degrees
Semi-directional
Email phishing is a form of…
Social Engineering
Poor passcode hygiene could end with a compromise of …
Physical Security
Encryption attempts to secure this aspect of wireless communications.
Confidentiality
May be compromised by the unbounded nature of wireless communications.
Confidentiality
may be compromised by man-in-the-middle attacks.
integrity
Hardest aspect of wireless communications to secure or harden.
Availability
devices may be compromised through publicly-known vulnerabilities in …
out of date software
Antennas provide _________ by focusing the radiation patter in a certain direction.
passive gain
Amplifiers provide _________ by injecting extra energy into the communications path between the radio the antenna.
Active gain
