ANetwork Interface Card (NIC)is the hardware responsible for network connectivity. If the NIC is failing or underperforming (e.g., due to a bad driver, hardware fault, or misconfiguration), it can causeslow or unstable network speeds.
Option A (CPU):A failing CPU affects overall system performance but not specifically network speed.
Option C (HDD):A slow hard drive causes application lag, but not poor network performance.
Option D (RAM):Affects multitasking and speed, not network throughput.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 3.5: Given a scenario, troubleshoot problems related to wired and wireless networks.
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