Which statements best describe auto discovery VPN (ADVPN). (Choose two.)

ADVPN requires dynamic routing protocols, such as BGP or OSPF, to allow spokes to learn routes to other spokes via the hub, facilitating the establishment of direct spoke-to-spoke tunnels.

While FortiGate's ADVPN implementation primarily relies on IKEv2, the statement implies a universal restriction that may not apply to all ADVPN concepts or implementations across different vendors, making it not a universally best descriptive feature.

A core feature of ADVPN is its ability to dynamically negotiate and establish direct VPN tunnels between spokes, optimizing traffic flow by eliminating the need for traffic to traverse the hub after initial discovery.

ADVPN's primary purpose is to eliminate the need for manually configured static tunnels between every spoke, instead establishing them dynamically as needed.