The session output shows the original flow entering with source address 10.20.30.40 and destination address 203.0.113.1. The return or translated side shows the source address represented as 192.0.2.1 while the destination address remains 203.0.113.1. This indicates source NAT behavior because the original source IP address is translated to a new source IP address. There is no destination NAT in the exhibit because the destination IP address does not change. In Junos source NAT, the firewall translates the source address, commonly to an interface address or address pool, while preserving the destination address unless another NAT type is also configured. Therefore, the correct statements are that the destination remains unchanged and the source address is translated.
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