Which VPN technology must be used to ensure that routers are able to dynamically form connections with each other rather than sending traffic through a hub and be able to advertise routes without the use of a dynamic routing protocol?
The correct answer is D. GETVPN (Group Encrypted Transport VPN).
GETVPN allows routers to dynamically form secure connections without relying on a hub-and-spoke model. Unlike DMVPN, which uses dynamic routing protocols, GETVPN ensures routers can advertise routes directly using a pre-shared group key without requiring a dynamic routing protocol. It is designed for secure communication over private MPLS or similar networks and maintains the original IP header, allowing full routing functionality between endpoints.
GETVPN does not use a dynamic routing protocol like the others because it uses crypto map. There's no hub for traffic to pass through where others can go through a hub. So answer is GETVPN
To ensure that routers can dynamically form connections with each other and advertise routes without relying on a dynamic routing protocol, the VPN technology that must be used is DMVPN Phase 3 (Dynamic Multipoint VPN Phase 3). DMVPN Phase 3 allows routers to establish direct spoke-to-spoke connections, eliminating the need to send traffic through a hub. It provides scalability and simplifies the configuration by allowing spoke routers to dynamically establish tunnels with each other as needed. Furthermore, DMVPN Phase 3 supports the use of Next Hop Resolution Protocol (NHRP), which enables route resolution and dynamic route advertisement between the spokes. On the other hand, FlexVPN is a different VPN technology that provides a modular framework for various VPN types, including site-to-site, remote access, and DMVPN. While FlexVPN offers flexibility and advanced features, DMVPN Phase 3 specifically addresses the requirements mentioned in your question.
Arguably A or B could be correct. NHRP, which is not listed as a dynamic routing protocol, can send routes via FlexVPN or DMVPN Phase 3. GETVPN does not send routes.
i think the correct answer is A
(FlexVPN supports the use of Dynamic Routing protocols such as EIGRP, BGP and OSPF. FlexVPN also has the ability to advertise routes in the IKEv2 SA's. In order to do this we must configure an IKEv2 Authorization Policy,)
The question suggests to not use any dynamic routing protocol. FlexVPN supports and depends on dynamic routing protocols, because of which, it cannot be the right answer.
The question suggests to not use route traffic through a hub, because of which, GETVPN cannot be the right answer either.
The question suggests the VPN technology should be able to dynamically form connections. That is possible with DMVPN Phase3. This is because DMVPN Phase3 uses the NHRP protocol redirect on the hub, thereby enabling direct spoke-to-spoke communication without having to route the actual traffic through the hub.
The right answer is B.
Answer can be B and D, Allows spoke-to-spoke communication even with default routing. So even though the routing table points to the hub, the traffic flows between spokes. No limits on routing, we still get spoke-to-spoke traffic flow even when you use default routes
i think D. All others need an overlay routing protocol.
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