Your company has outgrown its existing secure enterprise WAN that is configured to use OSPF, AutoVPN, and IKE version 1. You are asked if it is possible to make a design change to improve the WAN performance without purchasing new hardware.
Which two design changes satisfy these requirements? (Choose two.)
A . Modify the IPsec proposal from AES-128 to AES-256
B . Change the IGP from OSPF to IS-IS
C . Migrate to IKE version 2
D . Implement Auto Discovery VPN
Answer: BD
Explanation:
Reference: https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-auto-discoveryvpns.html