You are asked to deploy dynamic VPNs between the corporate office and remote employees that work from
home. The gateway device at the corporate office is a chassis cluster formed from two SRX240s. Which two
statements about this deployment are true? (Choose two.)

A.
You must remove the SRX240s from the chassis cluster before enabling the dynamic VPNs.

B.
The remote clients can run Windows XP, Windows Vista, Windows 7, or OS X operating systems.

C.
If more than two dynamic VPN tunnels are required, you must purchase and install a new license.

D.
The remote users can be authenticated by the SRX240s or a configured RADIUS server.

Explanation:
http://www.juniper.net/us/en/local/pdf/app-notes/3500201-en.pdf