200-101 Question #184: Real Exam Question with Answer & Explanation

The correct answer is C: The number 1 referred to in the ip nat inside source command references access-list number 1.. In the command 'ip nat inside source list 1 interface Serial0/0 overload', the number 1 refers to ACL number 1, which defines the inside local addresses eligible for translation. This is a standard NAT overload (PAT) configuration where the ACL identifies which internal hosts wil

Question

Refer to the exhibit. What statement is true of the configuration for this network?

Options

AThe configuration that is shown provides inadequate outside address space for translation of the number of inside addresses that are supported.
BBecause of the addressing on interface FastEthernet0/1, the Serial0/0 interface address will not support the NAT configuration as shown.
CThe number 1 referred to in the ip nat inside source command references access-list number 1.
DExternalRouter must be configured with static routes to networks 172.16.1.0/24 and 172.16.2.0/24.

Explanation

In the command 'ip nat inside source list 1 interface Serial0/0 overload', the number 1 refers to ACL number 1, which defines the inside local addresses eligible for translation. This is a standard NAT overload (PAT) configuration where the ACL identifies which internal hosts will have their addresses translated. Option A is incorrect because PAT (overload) allows many inside addresses to share a single outside IP. Option B is incorrect because the FastEthernet0/1 addressing does not invalidate the Serial0/0 NAT config. Option D is incorrect because ExternalRouter only needs a route back to the NAT outside interface, not to the internal subnets individually.

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