Designing Cisco Enterprise Networks (ENSLD) — Question 190

A network engineer must connect two sites across a public network using a secure tunneling technology that supports multicast traffic. Which technology should be selected?

Answer options

• A. IPsec
• B. GRE
• C. PPTP
• D. GRE over IPsec

Correct answer: D

Explanation

The correct answer is GRE over IPsec because it combines the tunneling capabilities of GRE, which supports multicast traffic, with the security features of IPsec. The other options do not provide the same level of support for multicast traffic or lack the necessary security features when used alone.