A host is connected to a Department network which is part of a University…
2004
A host is connected to a Department network which is part of a University network. The University network, in turn, is part of the Internet. The largest network in which the Ethernet address of the host is unique is:
- A.
the subnet to which the host belongs
- B.
the Department network
- C.
the University network
- D.
the Internet
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Correct answer: D
Answer: the Internet
Explanation:
Ethernet (MAC) addresses are intended to be globally unique. Manufacturers allocate an Organizationally Unique Identifier (OUI) plus device-specific bits to ensure this uniqueness.
Network hierarchy runs from subnet to department to university up to the Internet. Because MAC uniqueness is global, the largest network in which the address remains unique is the Internet.
Practical caveat: locally administered MAC addresses, virtualization, or deliberate spoofing can create duplicates, but these are exceptions to the intended global uniqueness.
Therefore, the correct answer is the Internet.
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