Which of the following could occur when both strong and weak ciphers are configured on a VPN concentrator? (Choose two.) 

Answer options:

A. An attacker could potentially perform a downgrade attack.
B. The connection is vulnerable to resource exhaustion.
C. The integrity of the data could be at risk.
D. The VPN concentrator could revert to L2TP.
E. The IPSec payload is reverted to 16-bit sequence numbers.

AE