A network engineer is configuring a corporate router to support a site-to-site VPN. Which IP protocol should be enabled on the router to securely encapsulate and transport payloads over the public network?
IPSec (Internet Protocol Security) is the correct choice because it is designed to securely encrypt and encapsulate data for secure transport over a public network, which is essential for VPNs. ICMP, used mainly for diagnostic purposes, does not support secure encapsulation. TCP and UDP are core transport protocols and do not inherently provide encryption or encapsulation necessary for VPN security.
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What is IPSec and how does it work?
What are the main differences between TCP and UDP?