What is a common feature of SD-WAN GRE Tunnels and IPSec Tunnels?

The correct answer highlights that both SD-WAN GRE Tunnels and IPSec Tunnels are designed to provide secure communication between different network segments. This is a fundamental characteristic of these tunneling protocols, as they encapsulate data packets and secure the data transmitted over potentially unsecured networks, such as the internet.

GRE (Generic Routing Encapsulation) Tunnels primarily focus on encapsulating a variety of network layer protocols, allowing information to travel safely between two endpoints. While GRE itself does not provide encryption or secure transport, when combined with the encryption capabilities of IPSec, it fulfills the requirement for secure, private communication over public networks.

IPSec Tunnels, on the other hand, are specifically designed to authenticate and encrypt data, ensuring confidentiality and integrity as it travels across the network. This makes IPSec a robust choice for securely connecting different sites, protecting the data regardless of the underlying transport mechanism.

Together, these tunneling protocols enable secure communications by creating encrypted or encapsulated channels between diverse network environments, illustrating the significance of security in network connectivity, particularly in an enterprise context.

The other options, while relevant to network environments, do not accurately represent the shared core feature of both GRE and IPSec Tunnels. For example, increasing bandwidth availability typically involves optimizing data