NETWORK / INFORMATION TECHNOLOGY COMPUTER COURSE UNIT 3 DB

NETWORK / INFORMATION TECHNOLOGY COMPUTER COURSE
UNIT 3 DB ASSIGNMENT DETAILS.
USE APA FORMAT
ANSWER THE BELOW 3 QUESTIONS
INTERNET OF THINGS COURSE
Question 1
The constraints faced by IoT devices include, size of state and buffers for RAM, available
sources of power, user interface and accessibility in deployment, throughput, processing power,
highly asymmetric link characteristics, cost, and physical size, code complexity for ROM or flash
(Nagasai, 2017). Constrained devices are connected to special devices which look like gateways
to enable communications via the internet.
Question 2
To ensure a successful IoT device communications, constrained devices are connected to low
power lossy networks and devices that look like gateways. For organizations to simplify the
crushing, constrained devices are connected to the internet. These constrained devices
communicate with other IoT cloud platforms. IEFT has published a reference handbook that puts
this constrained devices into three groups. That is class 0, class 1 and class 2. All these groups
have different levels of contraints.
Class 0 devices have constraints in memory and thus are initially configured and connected to
proxies, gateways, or servers. These connections enable devices to communicate via the internet.
The category of class 1 devices have constraints in low power IoT stack and code space and

processing capabilities. Finally, the category of class 2 devices are less constrained devices that
can perform at per with mobile devices. Reduced developmental cost and increased
interoperability are achieved when using class 2 devices (An Ha, Tho Nguyen, & Zao, 2016).
Question 3
During typical IoT device communications, the IoT devices use low-power wireless
communication protocols for example, BLE, LPWAN which are mostly battery powered with
low data rate, 802.15.4 which include Zigbee, 6LoWPAN, Thread, WirelessHART among
others.

References
An Ha, D., Tho Nguyen, K., & Zao, J. (2016). Efficient authentication of resource-constrained IoT
devices based on ECQV implicit certificates and datagram transport layer security protocol.
https://doi.org/10.1145/3011077.3011108 (Accessed 3.13.19).
Nagasai. (2017, February 18). Classification of IoT Devices. Retrieved March 13, 2019, from
http://www.cisoplatform.com/profiles/blogs/classification-of-iot-devices (Accessed 3.13.19).