H35-210_V2.5 · Question #165
Is the following description correct? The computer in the local area network judges whether the received broadcast frame is what it should receive is to judge the source of the frame MACIs the…
The correct answer is B. False. B is correct because the description has two critical errors. First, broadcast frames are addressed to the destination MAC address FF:FF:FF:FF:FF:FF, and every device on the LAN accepts and processes them by definition - no filtering judgment is needed. Second, the description…
Question
Is the following description correct? The computer in the local area network judges whether the received broadcast frame is what it should receive is to judge the source of the frame MACIs the address the same as the hardware address of the machine.
Options
- ATrue
- BFalse
How the community answered
(57 responses)- A19% (11)
- B81% (46)
Explanation
B is correct because the description has two critical errors. First, broadcast frames are addressed to the destination MAC address FF:FF:FF:FF:FF:FF, and every device on the LAN accepts and processes them by definition - no filtering judgment is needed. Second, the description incorrectly references the source MAC address; the source MAC identifies the sender, not the intended recipient.
Why A is wrong: A device determines whether a unicast frame is meant for it by comparing the frame's destination MAC address against its own hardware address - not the source address. Applying this unicast logic to broadcast frames is doubly incorrect.
Memory tip: Think "Destination decides delivery, Source shows the sender." For broadcasts, destination = FF:FF:FF:FF:FF:FF means everyone receives it - no per-machine comparison required.
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