ZigBee Channel Spacing: ZigBee channels in the 2.4 GHz band are spaced 5 MHz apart. This helps manage interference in the crowded 2.4 GHz spectrum.

The concept described is Free Space Path Loss (FSPL). FSPL refers to the reduction in power density of an electromagnetic wave as it propagates through a clear, unobstructed path in free space. This weakening of the signal is due to the spreading of the wavefront as it travels, causing the power to be distributed over a larger area. The FSPL can be calculated using the Friis Transmission Equation, which shows that the received power decreases with the square of the distance from the transmitter. This concept is fundamental to understanding the behavior of RF signals in various communication systems, including wireless IoT, where the signal strength at the receiver is a critical factor for reliable data transmission.
References:
The information provided aligns with the Friis Transmission Equation, which models how the power of an RF signal decreases with distance1. Additionally, the concept of FSPL is a well-known phenomenon in RF propagation, affecting the design and optimization of wireless communication systems

Wireless Transceiver: A transceiver is a combination of a transmitter and receiver used for wireless communication.
Radio: The radio is the primary component responsible for:
Modulation: Encoding data onto a carrier wave.
Demodulation: Extracting data from a received signal.
Transmission/Reception: Handling the actual sending and receiving of modulated signals over the air.
References
Transceiver: https://en.wikipedia.org/wiki/Transceiver

RFID for Livestock: Radio Frequency Identification (RFID) tags are the most widely used technology for livestock tracking and individual identification on large farms.
Benefits:
Unique ID: Each RFID tag has a unique code.
Data Storage: Some tags store information about the animal.
Durability: Tags withstand outdoor conditions.
Automated Reading: Tags can be scanned quickly.
References
RFID (General): https://en.wikipedia.org/wiki/Radio-frequency_identification

Perception Layer: The foundation of an IoT system, it consists of sensors and actuators that:
Sense: Collect data about the environment or object being monitored.
Actuate: Potentially make changes based on commands (e.g., a smart valve opening/closing).
Transmit: Send gathered data to upper layers for processing.