What are the two modes for phase 1 of the ISAKMP scheme? (Choose two)

A.
Aggressive mode

B.
Simple mode

C.
Main mode

D.
Extended mode

Explanation:

: VPN1/FW1 supports 2 modes, “aggressive mode” (the default), in which three packets are
exchanged, and “main mode”, in which six packets are exchanged. In phase 1, the peers
negotiate security associations that will be used for encrypting and authenticating Phase 2
exchanges. Phase 1 involves long and CPU intensive computations, so is executed infrequently.
See Page 7.13 of CCSE NG Official Courseware. (VPN1-FW1 Management II NG FP-1).