What does NAT traversal mean in the context of a TSC?

NAT traversal refers specifically to methods that enable clients to connect through Network Address Translation (NAT) devices. In the context of a Tactical Session Controller (TSC), this is particularly important because NAT can complicate direct communication between endpoints located across different networks.

When devices are behind NAT, they often cannot be reached directly from the outside due to how NAT modifies addresses and ports. NAT traversal techniques ensure that communication can still occur between these devices by using a variety of mechanisms such as STUN (Session Traversal Utilities for NAT), TURN (Traversal Using Relays around NAT), and ICE (Interactive Connectivity Establishment). These methods allow for determining valid routes for data packets and establishing sessions even when the devices are behind NAT.

Therefore, this option accurately encapsulates the essential purpose and functionality of NAT traversal in the context of a Tactical Session Controller, as it directly addresses a crucial aspect of enabling connectivity in network environments where NAT is employed.