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?
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A. B. C. D.D.
The technology that should be selected to connect two sites across a public network using a secure tunneling technology that supports multicast traffic is GRE over IPsec (Option D).
GRE (Generic Routing Encapsulation) is a tunneling protocol that encapsulates multiple protocols over a single-protocol backbone network. It can be used to encapsulate multicast traffic over an IP network, and it supports the forwarding of multicast packets between sites.
IPsec (Internet Protocol Security) is a suite of protocols used to secure communications over IP networks. It provides confidentiality, data integrity, and authentication between communicating peers. IPsec can be used to create a secure tunnel between two sites, which encrypts all traffic passing through it.
Combining these two technologies allows for the creation of a secure tunnel that supports multicast traffic. GRE provides the ability to encapsulate multicast traffic, while IPsec provides the encryption and authentication required to secure the traffic.
Therefore, the best option for this scenario is GRE over IPsec. This option allows for the secure transmission of multicast traffic between the two sites, providing confidentiality, data integrity, and authentication.