Inbound Flow (before NAT):

Source = 10.20.30.40 (internal private IP)

Destination = 203.0.113.1 (public DNS server)

Outbound Flow (after NAT):

Source = 192.0.2.1 (translated IP)

Destination = 203.0.113.1 (unchanged)

Analysis:

The source IP (10.20.30.40) was translated to 192.0.2.1. This indicates Source NAT was applied Option B is correct.

The destination IP changed between the inbound and outbound view. Inbound it was 203.0.113.1, and outbound it is still 203.0.113.1 in appearance, but notice the reversal: the session entry shows it as the outbound 'source' side. This confirms Destination NAT translation has occurred for 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.