They use a form of key exchange (using RSA, Diffie-Hellman etc) to transfer the (symmetric) key used by the symmetric block cipher. So typically ECDHE and AES-2

They use a form of key exchange (using RSA, Diffie-Hellman etc) to transfer the (symmetric) key used by the symmetric block cipher. So typically ECDHE and AES-256-GCM for e.g. so the symmetric key is wrapped.