The configuration implements source NAT using a policy-based approach with an address pool and Port Address Translation (PAT). The mode pat command in the address group configuration is key. PAT allows multiple internal (private) IP addresses to be translated to a single external (public) IP address by using different port numbers to distinguish between the connections. Therefore, the statement that post-NAT IP addresses for different intranet users must be different is false. Multiple users from the 192.168.0.0/16 network can be mapped to the same public IP address (e.g., 100.1.23.1) simultaneously, each with a unique source port number.

A. This is true. The address pool ranges from 100.1.23.1 to 100.1.23.254, so this IP is a valid post-NAT address.

B. This is true. The nat enable command is applied to interface GE0/0/2, so only traffic exiting this interface will have the NAT policy applied.

D. This is true. The IP address 192.168.1.100 falls within the source-address range 192.168.0.0 192.168.255.255 and will be translated.

1. Huawei HedEx Documentation

NE40E V800R012C10 Configuration Guide - IP Service

"NAT Configuration" section

"Configuring Policy-based NAT". This guide details the configuration of NAT policies.

2. Huawei HedEx Documentation

NE40E V800R012C10 Command Reference - IP Service

"nat address-group" command. The documentation for the mode pat parameter explicitly states it enables Port Address Translation

allowing multiple private users to share one or more public IP addresses.

3. RFC 2663

IP Network Address Translator (NAT) Terminology and Considerations

Section 2. "Basic NAT vs. NAPT". This RFC defines NAPT (Network Address Port Translation)

which is what PAT implements

as a method for mapping multiple private addresses to a single public address.