Which statement is true regarding the dynamic VPN feature for Junos devices?
A.
Only route-based VPNs are supported.
B.
Aggressive mode is not supported.
C.
Preshared keys for Phase 1 must be used.
D.
It is supported on all SRX devices.
Explanation:
Reference:http://www.juniper.net/techpubs/en_US/junos12.1×45/information-products/pathwaypages/security/security-vpn-dynamic.pdf
answer D is wrong . see : https://kb.juniper.net/library/CUSTOMERSERVICE/GLOBAL_JTAC/technotes/dynamic-vpn-appnote-v12.pdf page 3 .
http://www.juniper.net/techpubs/en_US/junos12.1×47/topics/concept/vpn-security-dynamic-tunnel-understanding.html