Exam-style question
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What is the main purpose of a MAC address in TCP/IP networking?.
- A.To identify an application process on a device
- B.To identify a device on a local network
- C.To identify the route through several networks
- D.To identify the programming language used by a client
Model answer
What a good answer should say
- To identify a device on a local network
Explanation
Why this works
A MAC address is associated with a network interface and is used by the link layer for delivery on the local network. Application processes are identified using port numbers, not MAC addresses.
Common mistake
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