What type of VPN can handle multicast and broadcast traffic in a secure manner?

The type of VPN that can handle multicast and broadcast traffic in a secure manner is a Dynamic Multipoint VPN (DMVPN). DMVPN is designed to facilitate the implementation of secure, scalable, and flexible VPNs that can support dynamic spoke-to-spoke communication.

One of the key features of DMVPN is its ability to establish direct tunnels between remote sites as needed, which allows for the transmission of multicast traffic directly between those sites. This is particularly useful in scenarios where applications rely on multicast traffic, such as video conferencing or certain types of broadcast services.

By utilizing protocols like Next Hop Resolution Protocol (NHRP), DMVPN effectively manages the routing of multicast packets, ensuring that they are delivered securely. This capability makes DMVPN suitable for environments where there is a need to maintain efficient communication among multiple sites while still ensuring secure connections.

In contrast, other types of VPNs, such as remote access VPNs or traditional site-to-site VPNs, are typically built for point-to-point connections rather than supporting dynamic and scalable communication models, thus limiting their ability to handle multicast and broadcast traffic seamlessly.