IKE - Internet Key Exchange
Internet Key Exchange (IKE) is a protocol used to set up a secure and authenticated communication channel (Security Association or SA) between two parties in the context of Internet Protocol Security (IPsec). It is commonly employed in virtual private network (VPN) implementations to establish secure connections over untrusted networks.
IKE, especially its role in setting up secure channels for IPsec, is relevant to the Security+ exam. Questions may cover the purpose of IKE, the phases of negotiation, authentication methods, key exchange, Main Mode vs. Aggressive Mode, Perfect Forward Secrecy, and its integration with IPsec for secure communication.