Which type of VPN offers more flexibility in terms of configuration?

Route-Based VPNs offer more flexibility in terms of configuration compared to other types of VPNs. This is primarily because they utilize a virtual tunnel interface (VTI) to define the VPN connection. With route-based VPNs, you can route traffic to multiple endpoints and apply complex routing protocols, allowing for more dynamic and adaptable network designs.

This flexibility makes it easier to manage traffic flows and integrate with other networking functions. For example, if changes are needed to the network architecture or if additional resources need to be connected, route-based configurations can often accommodate these changes with minimal disruption. Additionally, they allow for the use of various scenarios like overlapping IP addresses, which can be particularly beneficial in multi-site environments.

In contrast, policy-based VPNs are more static and rely on specific policies and access control lists to define traffic routes. SSL VPNs are generally user or application-centric and cater to remote user access rather than site-to-site connections. L2TP VPNs are also somewhat limited compared to route-based VPNs when it comes to configurability and flexibility, as they are typically tied to a specific endpoint setup. Therefore, route-based VPNs stand out for their capability to adapt to evolving network requirements.