A session border controller can help with which of the following security situations?

A session border controller (SBC) is primarily designed to manage and control signaling and media streams involved in VoIP (Voice over Internet Protocol) communications. One of the key functions of an SBC is to facilitate NAT (Network Address Translation) traversal, which refers to the challenges faced when initiating and maintaining a communication session between devices that are behind different NAT devices.

When devices behind NAT attempt to communicate over the internet, the IP addresses may not be directly reachable, potentially leading to issues with connection establishment and call quality. An SBC can mitigate these challenges by translating and managing the IP address and port information, allowing for seamless communication despite the NAT obstacles.

While SBCs can contribute to security aspects such as encryption and user authentication, those capabilities are not their primary role. Instead, their main focus is on operational functionality, such as NAT traversal, which is crucial for maintaining effective and reliable VoIP connectivity across different networks.