A switch log shows one port going up and down every few seconds. The patch cable in that port is loose in the jack. Which repair addresses the log?
Select an answer to reveal the explanation.
Short Explanation
The jack is a loose plug that keeps making and breaking the conversation, and the log is the record of that flicker. You reseat or replace the patch cable. A name server, a printer cartridge, and a disk array do not wiggle a jack.
Full Explanation
A port that goes up and down is flapping. A patch cable that is loose in the jack will drop and restore the link over and over, which matches the log, so reseating or replacing that cable is the repair. DNS resolves names after a link is stable. It does not make a switch port bounce. Toner is a printer consumable. It does not write link-flap entries or sit in a switch jack. A RAID rebuild is a disk operation on a server. It does not loosen a cable at the switch. Exam caveat: if a known-good cable still flaps, look at the jack itself and at the NIC on the other end. The loose cable is first because you can see it. Operational check: seat a good cable, watch the port stay up, and confirm the up-down messages stop in the log. Watch the switch log for a minute after the new cable is in and confirm the flaps stop. Replace the jack only if a known-good cable still flaps. Watch for a full minute so a slow flap is not missed. Tape the latch side of the plug so it stays seated.