Thesource IP (10.20.30.40)was translated to192.0.2.1. This indicatesSource NATwas applied →Option B is correct.
Thedestination IP changedbetween the inbound and outbound view. Inbound it was203.0.113.1, and outbound it is still203.0.113.1in appearance, but notice the reversal: the session entry shows it as the outbound "source" side. This confirmsDestination NAT translation has occurredfor return flow consistency →Option D is correct.
Option A:Incorrect. The original source IP was indeed translated.
Option C:Incorrect. The destination IP did change in the flow processing.
Correct Statements:
The original source IP address was translated to a new source IP address.
The original destination IP address was translated to a new destination IP address.
[Reference:Juniper Networks –Security Flow Session Output and NAT Translations, Junos OS Security Fundamentals., , ]
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