Seems to me that the Diffie-Hellman key agreement protocol results in a symmetric shared private key. However, the books I've used for Security+ prep put it with RSA as a public-key algorithm.

Martin Hellman achieved legendary status as co-inventor of the Diffie-Hellman public key exchange algorithm, a breakthrough in software and computer cryptography. That invention and his ongoing work ...

Vince Berk is the Chief Strategist at Quantum Xchange, a post-quantum crypto-agility provider. Ph.D. in AI/ML, founder of FlowTraq. A recent paper from Chinese researchers claiming that they can break ...