Refer to the exhibit. An administrator is trying to configure PAT on R1, but PC-A is unable to access the Internet. The administrator tries to ping a server on the Internet from PC-A and collects the debugs that are shown in the exhibit. Based on this output, what is most likely the cause of the problem?

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Last Updated on November 23, 2020 by Admin

Refer to the exhibit. An administrator is trying to configure PAT on R1, but PC-A is unable to access the Internet. The administrator tries to ping a server on the Internet from PC-A and collects the debugs that are shown in the exhibit. Based on this output, what is most likely the cause of the problem?

CCNA3 v7 - ENSA Final Exam Answers 08
CCNA3 v7 – ENSA Final Exam Answers 08
  • The address on Fa0/0 should be 64.100.0.1.
  • The inside and outside NAT interfaces have been configured backwards.
  • The inside global address is not on the same subnet as the ISP.
  • The NAT source access list matches the wrong address range.
    Answers Explanation & Hints:

    The output of debug ip nat shows each packet that is translated by the router. The “s” is the source IP address of the packet and the “d” is the destination. The address after the arrow (“->”) shows the translated address. In this case, the translated address is on the 209.165.201.0 subnet but the ISP facing interface is in the 209.165.200.224/27 subnet. The ISP may drop the incoming packets, or might be unable to route the return packets back to the host because the address is in an unknown subnet.

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