Which of the following technologies allows for the secure exchange of encryption keys within an internal network?

AES (Advanced Encryption Standard) is a symmetric-key block cipher used for encrypting data, not for exchanging encryption keys.

RC4 is a symmetric-key stream cipher used for encrypting data, not for exchanging encryption keys, and is considered insecure for many modern applications.

Diffie-Hellman (DH) is a key-exchange algorithm that enables two parties to establish a shared secret key over an insecure communication channel without any prior shared secrets. This shared secret key can then be used to encrypt subsequent data transmissions using a symmetric-key algorithm, thereby securing the communication within an internal network.

3DES (Triple Data Encryption Standard) is a symmetric-key block cipher used for encrypting data, an older and slower alternative to AES, and not designed for key exchange.