What is NAT traversal and why is it needed for peer-to-peer or VPN connections?

• A. NAT traversal translates private IPs to public IPs on a gateway for outbound web traffic.
• B. NAT traversal helps peers behind NAT establish connections by exchanging public addresses or relaying traffic through a TURN server; methods include STUN and TURN.
• C. NAT traversal is unnecessary because NAT always allows direct connections.
• D. NAT traversal encrypts translations to secure traffic.

Answer: (B)