What is the name of the protocol use to set up and manage Security Associations (SA) for IP Security (IPSec)?

A.
Internet Key Exchange (IKE)

B.
Secure Key Exchange Mechanism

C.
Oakley

D.
Internet Security Association and Key Management Protocol

Explanation:
Internet Key Exchange (IKE) is the protocol employed to establish a security association (SA) in the IPsec
protocol suite.
Incorrect Answers:
B: Secure Key Exchange Mechanism allows different key distribution methods to be applied.
C: OAKLEY is a key-agreement protocol that enables authenticated parties to exchange keying material via an
insecure link by making use of the Diffie–Hellman key exchange algorithm.
D: Internet Security Association and Key Management Protocol is a protocol defined for instituting Security
Associations (SA) and cryptographic keys in an Internet environment.

https://en.wikipedia.org/wiki/Internet_Key_Exchange
Miller, David R, Microsoft CISSP Training Kit, O’Reilly Media, 2013, California, p. 226
https://en.wikipedia.org/wiki/Oakley_protocol
https://en.wikipedia.org/wiki/Internet_Security_Association_and_Key_Management_Protocol