Radio transmission is the sending of information through radio waves instead of a wired channel. Because the signal travels through open air, it can reach many receivers at once, cover long distances, and work without direct physical cabling. That makes it useful for broadcast systems, remote sensors, and devices that need to communicate where wires are impractical.
In cyber security, radio transmission matters because anything sent over the air may be intercepted, jammed, spoofed, or replayed if protections are weak. Attackers can abuse wireless links as covert channels, while defenders rely on encryption, authentication, frequency management, and spectrum monitoring to reduce exposure. Radio-based services also need careful power, range, and interference testing, since accidental leakage can reveal data just as effectively as a deliberate attack.