You work as the network administrator for uCertify Inc. The company has planned to add the support for IPv6 addressing. The initial phase deployment of IPv6 requires support from some IPv6-only…

Question

Options

• AMultipoint tunnels
• BNAT-PT
• CPoint-to-point tunnels
• DNative IPv6

• A
  7% (3)
• B
  78% (35)
• C
  4% (2)
• D
  11% (5)

Explanation

NAT-PT (Network Address Translation - Protocol Translation) is the correct answer because it directly translates between IPv6 and IPv4 at the protocol level, allowing IPv6-only clients to communicate with IPv4-only servers - exactly the scenario described.

Why the distractors fail:

• A & C (Multipoint/Point-to-point tunnels) encapsulate IPv6 packets inside IPv4 packets to cross an IPv4 network, but they require IPv6 support at both endpoints - the IPv4-only server can't participate.
• D (Native IPv6) simply means running IPv6 without any transition mechanism, which is useless when the destination servers only speak IPv4.

Memory tip: Think of NAT-PT as a "language interpreter" - it doesn't just carry a message through a foreign country (tunneling), it actually translates the message so the other side can understand it. If the server only speaks IPv4, you need translation, not a tunnel.

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