A user in your organization reports intermittent network access. While troubleshooting, you observe that the switch port to which the user's computer is connected repeatedly changes from the up state to the down state and back again every few seconds. What is this condition called?
Port flapping-also known as link flap-occurs when a switch interface goes up, then down, then up again in rapid succession. Because the physical link keeps resetting, any device on that port experiences intermittent connectivity. Faulty or non-standard cables, failing transceivers, or configuration mismatches are common causes. Jitter, high latency, and external interference affect packet timing or signal quality but do not cause the port itself to toggle states.
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CompTIA A+ 220-1101 (V14)
Hardware and Network Troubleshooting
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