Which statement best describes Teredo?

Which statement best describes Teredo?

• A. It enables IPv6 connectivity over IPv4 networks by tunneling IPv6 in UDP
• B. It requires direct IPv6 connectivity with no NATs
• C. It uses TCP for tunneling instead of UDP
• D. It replaces IPv4 with IPv6 entirely

Answer: (A)

Teredo is a way to carry IPv6 traffic over an IPv4 network by tunneling IPv6 inside UDP datagrams. This design lets devices behind NATs or firewalls still reach IPv6 sites without requiring a native IPv6 path. Using UDP for the tunnel helps NAT traversal, which is why Teredo works well in many IPv4 environments. It does not require direct IPv6 connectivity, it does not use TCP for tunneling, and it does not replace IPv4 with IPv6—it's a tunneling mechanism that enables IPv6 over IPv4 networks.

Teredo is a way to carry IPv6 traffic over an IPv4 network by tunneling IPv6 inside UDP datagrams. This design lets devices behind NATs or firewalls still reach IPv6 sites without requiring a native IPv6 path. Using UDP for the tunnel helps NAT traversal, which is why Teredo works well in many IPv4 environments. It does not require direct IPv6 connectivity, it does not use TCP for tunneling, and it does not replace IPv4 with IPv6—it's a tunneling mechanism that enables IPv6 over IPv4 networks.