Question

Refer to the exhibit. Given the network address translation (NAT) topology, identify the IP address that is the inside local IP address. (NOTE: To avoid using an organization's actual IP addresses in this question, all IP addresses are technically private IP addresses. However, assume that the network and the IP address are publicly routable.)

a) 192.168.1.10
b) 10.0.0.10
c) 172.16.1.10
d) 203.0.113.10

Answer 1

The inside local IP address in a NAT topology refers to the address of a device within the local network when considering them as publicly routable for the exercise. It is typically an address from the private range and is seen from within the network. Option a) 192.168.1.10 is a likely candidate given its common usage in default private IP configurations.

Step-by-step explanation:

The term inside local in the context of Network Address Translation (NAT) refers to the IP address of a device as seen from within the local network. Assuming that the given IP addresses are publicly routable for the purpose of this scenario, and given the common private IP address spaces, the inside local IP address is likely the IP address assigned to a device within the internal network. The options provided are all private IP addresses, but we are considering them as publicly routable for this exercise.

Option a) 192.168.1.10, b) 10.0.0.10, and c) 172.16.1.10 are private addresses in common use within internal networks. Option d) 203.0.113.10 is an address in a range typically used for documentation and examples. In NAT topology, the inside local address would be assigned to a host within the network; hence, options a), b), and c) could potentially be inside local addresses. Without additional context on the network topology, it is not possible to determine definitively which one is the inside local IP address. If we must choose one, the more commonly used default private IP range for home and small business routers is the 192.168.x.x range, making option a) a likely candidate.