Defined in RFC 7296, the modernized version of the Internet Key Exchange protocol that replaced IKEv1 to streamline tunnel negotiation is _____.

### Why this is right The lab specifies Internet Key Exchange version 2 (IKEv2) for the VPN configuration. The two firewalls must use compatible settings so they can negotiate their connection. ### The concept IKE establishes and manages the security associations used by the VPN. The lab also specifies the default IKE and IPsec cryptographic profiles, so students should not substitute unrelated settings. Compatibility between peers is necessary for negotiation to succeed. ### Terms - **IKE**: Internet Key Exchange, the protocol that negotiates VPN security settings. - **IKEv2**: Internet Key Exchange version 2, the version used in this lab. - **IPsec**: Internet Protocol Security, the suite that protects traffic in the VPN. ### Remember Use IKEv2 on the VPN peers, as specified by the lab.