200-301 Question #125: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. Which feature is enabled by this configuration?

Options

• Astatic NAT translation
• Ba DHCP pool
• Ca dynamic NAT address pool
• DPAT

Explanation

The provided configuration, defining an ip nat pool and linking it to an access-list with ip nat inside source list <acl> pool <pool_name>, enables dynamic Network Address Translation (NAT).

Common mistakes.

• A. Static NAT involves a one-to-one, permanent mapping between specific private and public IP addresses, typically configured with ip nat inside source static commands, which are not present here.
• B. A DHCP pool is used to assign IP addresses to client devices within a network and is configured with ip dhcp pool commands, unrelated to NAT functionality.
• D. PAT (Port Address Translation) or NAT Overload, allows multiple private IP addresses to share a single public IP address using different port numbers. This is typically indicated by the overload keyword or a pool with a single IP, not explicitly by the range-based ip nat pool command shown.

Concept tested. Dynamic NAT pool configuration

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/xe-3s/nat-xe-3s-book/iadnat-basic-nat.html#d500696e106

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