200-301 Question 361
Single answerA network engineer is tasked with configuring static NAT on a router to allow a web server inside the private network with IP address 192.168.1.100 to be accessible from the Internet using the public IP address 203.0.113.10. Which configuration command correctly implements this static NAT?
- A
ip nat inside source static 192.168.1.100 203.0.113.10
- B
ip nat outside source static 192.168.1.100 203.0.113.10
- C
ip nat pool STATIC_POOL 192.168.1.100 192.168.1.100 netmask 255.255.255.0
- D
ip nat inside static NAT 192.168.1.100 203.0.113.10
Show answer and explanation
Correct answer: A
Explanation
Static NAT is used to map a single private IP address to a single public IP address, allowing devices on the public network (e.g., the Internet) to access resources on the private network. The correct command for this scenario is 'ip nat inside source static
- A. Correct.
This is the correct command for configuring static NAT for translating an internal private IP address to a public IP address. It specifies the inside source IP (192.168.1.100) and maps it to the public IP (203.0.113.10).
- B. Incorrect.
This command is incorrect because it is used for configuring 'outside source' NAT, which translates external IP addresses to internal ones. The scenario requires 'inside source' NAT.
- C. Incorrect.
This command is related to creating a NAT pool, not a static NAT configuration. A NAT pool is used for dynamic NAT, not a one-to-one static mapping.
- D. Incorrect.
This is an invalid command syntax. Static NAT is configured using 'ip nat inside source static', not 'ip nat inside static NAT'.