Internet Key Exchange, IKE, is a standard key management protocol that is used to do...

The correct answer isD. IKE is the protocol used to negotiate and establish the VPN tunnel. Its job is broader than merely refreshing keys after a timer expires. Check Point’s VPN documentation describes IKE as the encryption key management protocol used to create VPN tunnels. During negotiation, peers authenticate each other, agree on cryptographic methods, perform key exchange, and establish the Security Associations that IPsec uses for encrypted traffic. Option A is incomplete because rekeying is only one part of the lifecycle, not the full purpose of IKE. Option B is even narrower and incorrectly limits the role to Phase 2 renewal. Option C is wrong because VPN Domain information is a Check Point policy/configuration construct, not something IKE updates dynamically. For exam accuracy, treat IKE as thecontrol-plane negotiation protocol for IPsec VPN, while IPsec/ESP protects the actual data-plane traffic. Reference topic:Check Point VPN / IPsec and IKE.

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