What three protocols must be permitted through the company firewall for establishment of IPsec site-to-site VPNs? (Choose three.)
- HTTPS
- SSH
- AH
- ISAKMP
- NTP
- ESP
Explanation: ESP, AH, and ISAKMP must all be permitted through the perimeter routers and firewalls in order for IPsec site-to-site VPNs to be established. NTP and HTTPS are application protocols and are not required for IPsec.
Exam with this question: CCNA Security Chapter 8 Exam Answers
Exam with this question: Module 19: Quiz – Implement Site-to-Site IPsec VPNs Network Security
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