What technique is used with Network Address Translation (NAT) when a source port chosen by a client is the same port used by a router?

Q: What technique is used with Network Address Translation (NAT) when a source port chosen by a client is the same port used by a router?

or

Q: When a client selects a source port that a router already uses, what method of Network Address Translation (NAT) is employed?

• Preservation
• Forwarding
• Masquerading
• Translation

Explanation: When doing NAT, port preservation ensures that the source port remains unchanged. This is beneficial since it helps to maintain consistency in connections and prevents conflicts with other sessions.