Exam-style question
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Which statement correctly compares well-known ports and client ports?.
- A.Well-known ports identify commonly used server services, while client ports identify the client's communication endpoint.
- B.Well-known ports are MAC addresses, while client ports are IP addresses.
- C.Well-known ports are used only by the link layer, while client ports are used only by the application layer.
- D.Well-known ports identify the physical network cable, while client ports identify the router.
Model answer
What a good answer should say
- Well-known ports identify commonly used server services, while client ports identify the client's communication endpoint.
Explanation
Why this works
A well-known port is associated with a recognised service on a server. A client uses a client port to distinguish its communication endpoint, especially when it has connections to services.
Common mistake
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