60GHz Absorption: The 60GHz band experiences significant signal attenuation due to absorption by oxygen molecules in the atmosphere. This severely restricts the usable range of wireless systems operating in this frequency.
Why Other Options Don't Apply:
Atmospheric Scattering: Impacts longer wavelength transmissions, less significant at 60GHz.
Solar Radiation: Can cause interference on some frequencies, but not a primary range limitation at 60GHz.
Rain Fade: Primarily affects higher frequencies (above 10GHz), but its impact is less severe than oxygen absorption at 60GHz.
References:
60GHz Propagation Characteristics: Technical papers discussing oxygen absorption and its influence on range limitations.
Millimeter-wave (mmWave) Communication: Overviews highlighting the challenges and short-range applications of 60GHz systems.

IIoT Environments: Industrial IoT (IIoT) often involves deployment in harsh environments (factories, plants, outdoor sites) with:
Extreme temperatures
Dust & Vibrations
Exposure to chemicals or moisture
Ruggedization: IIoT devices are designed to withstand these conditions, ensuring reliability and longevity.
References
IIoT: https://en.wikipedia.org/wiki/Industrial_Internet_of_things
Rugged Devices: Articles on ruggedized electronics will emphasize their importance in industrial settings.

PtMP (Point-to-Multipoint): A single access point (AP) communicates with multiple client devices. This means the AP needs to manage how the available airtime is shared among those clients.
Airtime Fairness: Mechanisms are needed to ensure that:
Each client gets a fair chance to communicate
High-priority traffic isn't starved by low-priority traffic
PtP (Point-to-Point): A dedicated link only has two devices, eliminating the need for complex airtime management.
Considerations in Both: While interference, SINR, and frequency selection are important in both PtMP and PtP systems, the need for airtime management is unique to the multipoint scenario.
References:
Wireless Network Topologies (PtP vs. PtMP): References of the differences in how communication is managed in each scenario.
TDMA (Time Division Multiple Access): A common airtime sharing method used in PtMP systems.

LoRa: This refers to the underlying radio modulation technique using Chirp Spread Spectrum (CSS). It defines how data is physically encoded onto the wireless signal.
LoRaWAN: This is the network protocol built on top of LoRa. It manages device communication, network topology, and aspects like security. It operates at the MAC sublayer of the Data Link layer (Layer 2) of the OSI model LoRa vs. LoRaWAN: Key takeaway is that LoRa is the physical layer technology, while LoRaWAN adds the networking layer for management.
References:
LoRa Modulation: Technical explanations of Chirp Spread Spectrum (CSS).
LoRaWAN Specification: Official documentation detailing the network architecture and MAC layer functions.
OSI Model: Descriptions of the Data Link layer and its role in networking.

IETF's Focus: The Internet Engineering Task Force (IETF) primarily develops and standardizes internet protocols operating at the Network Layer (Layer 3) and above in the OSI model.
Key Protocols: Some prominent IETF-developed protocols include:
IP (Internet Protocol): Foundation of internet addressing and routing.
TCP (Transmission Control Protocol): Reliable, connection-oriented data transport.
UDP (User Datagram Protocol): Connectionless, best-effort data transport.
DNS (Domain Name System): Translates domain names into IP addresses.
HTTP (Hypertext Transfer Protocol): Web communication.
References
IETF Website: https://www.ietf.org/
OSI Model: https://en.wikipedia.org/wiki/OSI_model