Which device contains the unique physical MAC address hardware mapping, serving as the physical interface layer between a computer's bus tracks and an Ethernet line?
Explanation:
The NIC provides the physical interface and circuitry a computer needs to connect to network media, and carries a unique, hardcoded MAC address.
What basic operational weakness is shared by both Bus and Star topologies if their respective central shared medium (backbone line or central switch) fails completely?
A.They experience an instantaneous duplication of MAC addresses.
B.They automatically switch to high-frequency multicast mode.
C.They require dynamic analog rewiring steps.
D.They suffer a single point of failure that can cause total network collapse.
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