An enterprise is working with a third party and needs to allow access between the internal networks of both parties for a secure file migration. The solution needs to ensure encryption is applied to all traffic that is traversing the networks. Which of the following solutions should most likely be implemented?

IPSec (Internet Protocol Security) is the most suitable solution because it provides a framework for secure communication over IP networks, specifically offering encryption and authentication for all traffic between the two networks. It operates at the network layer, ensuring end-to-end encryption for the entire file migration. EAP (Extensible Authentication Protocol) is an authentication framework, not an encryption solution for network traffic. SD-WAN (Software-Defined Wide Area Network) is an architectural approach for managing networks, not a direct encryption protocol. TLS (Transport Layer Security) encrypts traffic at the transport layer, typically for application-level connections (like HTTPS), but IPSec is better suited for securing all traffic between two entire networks.