What does a client application select for a TCP or UDP source port number?

Question:
What does a client application select for a TCP or UDP source port number?

• a random value in the well-known port range
• a random value in the range of the registered ports
• a predefined value in the well-known port range
• a predefined value in the range of the registered ports

Explanation: The client randomly selects an available source port in the range of the registered ports.

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