350-401 · Question #1025
Refer to the exhibit. An engineer must configure PAT to provide internet access to all users by using one global address for many local addresses. Which command set completes the configuration?
The correct answer is D. RouterA(config)# ip nat inside source list 1 pool cisco overload. The question asks for the command to configure PAT (Port Address Translation) to allow multiple internal users to share a single public IP address for internet access.
Question
Refer to the exhibit. An engineer must configure PAT to provide internet access to all users by using one global address for many local addresses. Which command set completes the configuration?
Exhibits
Options
- ARouterA(config)# ip nat inside source static 172.16.1.1 172.16.1.2
- BRouterA(config)# ip nat inside source list 1 pool cisco
- CRouterA(config)# ip nat inside source static 172.16.1.1 193.64.64.1
- DRouterA(config)# ip nat inside source list 1 pool cisco overload
How the community answered
(38 responses)- A16% (6)
- B5% (2)
- C8% (3)
- D71% (27)
Why each option
The question asks for the command to configure PAT (Port Address Translation) to allow multiple internal users to share a single public IP address for internet access.
This command configures static NAT, mapping a single internal IP to a single internal-range IP, which does not provide one global address for many local addresses.
This command configures dynamic NAT without overload, which uses a pool of global IPs for one-to-one translation and does not allow multiple internal hosts to share a single global IP.
This command configures static NAT, mapping a single internal IP to a single external IP, which does not meet the requirement for many local addresses sharing one global address.
The command `ip nat inside source list 1 pool cisco overload` correctly configures PAT. It specifies that traffic matching access-list 1 should be translated using addresses from the 'cisco' pool, with the `overload` keyword enabling port translation to allow many internal hosts to share one global IP.
Concept tested: Cisco IOS PAT (NAT Overload) configuration
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/xe-3s/nat-xe-3s-book/ipnat-overload.html
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