Chapter 13 - 01 - Understand IoT Devices, Application Areas, and Communication Models - 05_ocred.pdf

Certified Cybersecurity Technician 10T and OT Security Exam 212-82 IoT Communication Models m Device-To-Device Model Q P PRI m S oy R [ ] Light Bulb from manufacturer A > Wireless Network. I‘ Light Switch from manufacturer B ¥ Bluetooth N S......... " tep v IPvé : —l.| L] T?.‘::::m“t"ut?e Applicatio...

Certified Cybersecurity Technician 10T and OT Security Exam 212-82 IoT Communication Models m Device-To-Device Model Q P PRI m S oy R [ ] Light Bulb from manufacturer A > Wireless Network. I‘ Light Switch from manufacturer B ¥ Bluetooth N S......... " tep v IPvé : —l.| L] T?.‘::::m“t"ut?e Application s v Bluetooth smart e s v IEEE 802.11 (Wi-Fi) IEEE 802.15.4 (LR-WPAN) v ons e ? P U 7 é Device with Carb:‘rli l\::lvwllde Sensor ] CoAP - _ Yy 9 '9' é , Service Provider2 ‘HTTP’ Ush ight Sensor Device with Carbon Monoxide Application o Application " Service Provider#1 Y., "yrTes Oauth 2.0 JSON "oy Application Service Provider #13 sensor Copyright © by IC-C IoT Communication v coAar Protocol Stack v CoAp.,y DTS I IPva/IPvE ¥ v upp w\% v IPv6 Local Gateway v Ml v Tee... Cloud-to-Cloud (Back-End Data-Sharing Model) ;................ e Sensor Application Service Provider Sensor Service Provider v wre Device with Device-to-Gateway Model v HTTP............. Temperature Igbee n v H : :‘wb:" (fl L, 4| Device-To-Cloud Model il Al Rights Reserved. ReproductionIs Strictly Prohibited Models loT technology uses various technical communication models, each with its own characteristics. These models highlight the flexibility with which 10T devices can communicate with each other or with the client. Discussed below are four communication models and the key characteristics associated with each model: Device-to-Device Communication Model In this type of communication, inter-connected devices interact with each other through the Internet, but they predominantly use protocols such as ZigBee, Z-Wave or Bluetooth. Device-to-device communication is most commonly used in smart home devices such as thermostats, light bulbs, door locks, CCTV cameras, and fridges, which transfer small data packets to each other at a low data rate. This model is also popular in communication between wearable devices. For example, an ECG/EKG device attached to the body of a patient will be paired to his/her smartphone and will send him/her notifications during an emergency. _\Q/_.........____’ 4....................;@.4....... Light Bulb from manufacturer A O Wireless Network v’ Bluetooth o I Light Switch from manufacturer B v’ Z-wave v Zigbee Figure 13.4: 10T device-to-device communication model Module 13 Page 1571 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 loT and OT Security Device-to-Cloud Communication Model In this type of communication, devices communicate with the cloud directly, rather than directly communicating with the client to send or receive data or commands. communication well. protocols such as Wi-Fi or Ethernet, and sometimes It uses uses Cellular as An example of Wi-Fi-based device-to-cloud communication is a CCTV camera that can be accessed on a smartphone from a remote location. In this scenario, the device (here, the CCTV camera) cannot directly communicate with the client; rather, it first sends data to the cloud, and then, if the client inputs the correct credentials, he/she is then allowed to access the cloud, which in turn allows him/her to access the device at his/her home. - L.ee=**""" (F = Device with Temperature 4" Application Service Provider v CoAP HTTP vv TLS v DTLS v v v TCP T é v' UDP o IP.. Device with P Sensor Carbon Monoxide Sensor Figure 13.5: 10T device-to-cloud communication model Device-to-Gateway Communication Model In the device-to-gateway communication model, the 10T device communicates with an intermediate device called a gateway, service. This gateway device could intermediate point, which also which in turn be a smartphone provides security communicates with the cloud or a hub that is acting as an features and data or protocol translation. The protocols generally used in this mode of communication are ZigBee and Z-Wave. If the application layer gateway is a smartphone, then it might take the form of an app that interacts with the 10T device and with the cloud. This device might be a smart TV that connects to the cloud service through a mobile phone app. Module 13 Page 1572 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician loT and OT Security Exam 212-82 Application v’ HTTP VTS rP L. CoAP v DTS