Which of the following is NOT a well-known port (not in the 0-1023 range)?

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Multiple Choice

Which of the following is NOT a well-known port (not in the 0-1023 range)?

The main idea is that well-known ports are the 0–1023 range, reserved for standard services. In this list, the numbers 20 and 21 are associated with FTP (data and control channels), and 80 is the standard HTTP port—each of these sits inside the well-known range. The number 8080, on the other hand, is commonly used as an alternative HTTP port and sits outside that range, in the registered port range. Therefore, 8080 is not a well-known port.

The main idea is that well-known ports are the 0–1023 range, reserved for standard services. In this list, the numbers 20 and 21 are associated with FTP (data and control channels), and 80 is the standard HTTP port—each of these sits inside the well-known range. The number 8080, on the other hand, is commonly used as an alternative HTTP port and sits outside that range, in the registered port range. Therefore, 8080 is not a well-known port.

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