Internet of Things Topologies

Question 1

Internet of Things Topologies

Answer 1

• Wearable technology
  
  • Watches, health monitors, glasses
  • Track our location
  • Where is that data and how is it stored?
• Home automation
  
  • Video doorbells
  • Internet-connected garage door openers
  • Heating and cooling
  • It knows when you are home (and when you aren’t)

Question 2

Z-Wave

Answer 2

• Home automation networking
  
  • Control lights, locks, garage doors, etc.

• Wireless mesh networking
• Nodes can hop through other nodes on the way to
the destination

• Uses the ISM band
  
  • Industrial, Scientific, and Medical
  • 900 MHz frequencies in the US
  • No conflicts with 802.11

Question 3

ANT / ANT+

Answer 3

• Wireless sensor network protocol
  
  • 2.4 GHz ISM band (industrial, scientific, and medical)
  • An “Internet of Things” ultra-low-power protocol
  • Fitness devices, heart rate monitors, etc.
• A separate wireless service
  
  • Not 802.11 or Bluetooth
• Denial of service
  
  • Spectrum jamming
• Optional encryption
  
  • And no method to maintain integrity

Question 4

Bluetooth

Answer 4

• High speed communication over short distances
  
  • PAN (Personal Area Network)

• Connects our mobile devices
• Smartphones, tethering, headsets and headphones,
health monitors, automobile and phone integration,
smartwatches, external speakers

Question 5

Near field communication (NFC)

Answer 5

• Two-way wireless communication
  
  • Builds on RFID, which is mostly one-way
• Payment systems
  
  • Google wallet and MasterCard partnership
• Bootstrap for other wireless
  
  • NFC helps with Bluetooth pairing
• Access token, identity “card”
  
  • Short range with encryption support

Question 6

IR (Infrared)

Answer 6

• Included on many smartphones, tablets, and
smartwatches
• Not really used for file transfers and printing

• Control your entertainment center
  
  • Many IR options

Question 7

RFID (Radio-frequency identification)

Answer 7

• It’s everywhere
  
  • Access badges
  • Inventory/Assembly line tracking
  • Pet/Animal identification
  • Anything that needs to be tracked
• Radar technology
  
  • Radio energy transmitted to the tag
  • RF powers the tag, ID is transmitted back
  • Bidirectional communication
  • Some tag formats can be active/powered

Question 8

IEEE 802.11

Answer 8

• Wireless networking (802.11)
• Managed by the IEEE LAN/MAN Standards
Committee (IEEE 802)

• Many updates over time
  
  • Check with IEEE for the latest
• The Wi-Fi trademark
  
  • Wi-Fi Alliance handles interoperability testing