Which of the following defines the key exchange for Internet Protocol Security (IPSec)?

 Internet Key Exchange (IKE) is a protocol that defines the key exchange for Internet Protocol Security (IPSec). IPSec is a suite of protocols that provides security for IP-based communications, such as encryption, authentication, and integrity. IKE establishes a secure channel between two parties, negotiates the security parameters, and generates the cryptographic keys for IPSec . References: : CISSP All-in-One Exam Guide, Eighth Edition, Chapter 5, page 541. : CISSP For Dummies, 7th Edition, Chapter 5, page 157.