Which three statements are functions that are performed by IKE phase 1? (Choose three)
A. It builds a secure tunnel to negotiate IKE phase 1 parameters
B. It establishes IPSec security associations
C. It authenticates the identity of the IPsec peers
D. It protects the IKE exchange by negotiating a matching IKE SA policy
E. It protects the identity of IP sec peers
F. It negotiates IPsec SA parameters
