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CompTIA Network+ · Exam domain
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1. During network troubleshooting, which of the following is the MOST crucial initial step according to the CompTIA troubleshooting methodology?
Explanation
Identifying the problem is the crucial first step. A is incorrect because implementing a solution without understanding the problem can worsen the situation. B is incorrect because documentation is important, but it follows problem identification. D is incorrect because escalation should occur after initial attempts to identify the problem.
2. After establishing a theory of probable cause, what is the NEXT step in the CompTIA network troubleshooting methodology?
Explanation
The next step is to test the theory to confirm or deny the probable cause. A is incorrect because documentation occurs later in the process. B is incorrect because implementation occurs after verification. D is incorrect because the plan of action comes after validating the cause.
3. After implementing a solution to a network problem, what is the MOST important step to perform NEXT?
Explanation
Verifying full system functionality ensures the problem is truly resolved and prevents recurrence. A is incorrect because while important, verification takes precedence. B is incorrect because notifying users is important, but confirming the fix first is essential. D is incorrect because failing to verify the fix may lead to recurring issues.
4. A network technician suspects a cable run is experiencing significant signal degradation over its length. Which tool is MOST appropriate for determining the extent of signal loss and identifying potential break points?
Explanation
A TDR/OTDR (Time Domain Reflectometer/Optical Time Domain Reflectometer) is specifically designed to measure signal loss and identify faults along the length of a cable. A is incorrect because a cable tester primarily verifies basic connectivity, not signal degradation over distance. B is incorrect because a toner probe is used for cable tracing, not signal measurement. C is incorrect because a crimper is a tool for attaching connectors, not for testing cable performance.
5. A network administrator is troubleshooting a network connection and suspects that the RJ45 connector on a patch cable has been wired incorrectly, preventing data transmission. Which tool should the administrator use to verify the pinout of the cable?
Explanation
A cable tester is the correct tool to verify the pinout of a cable. Many cable testers have a feature to display the wiring sequence of each pin, allowing you to identify incorrect wiring. A is incorrect because a loopback plug tests a device's own transmit and receive functionality, not cable pinouts. B is incorrect because a punchdown tool is used to terminate wires into a patch panel or keystone jack, not to test pinouts. D is incorrect because a toner probe is for cable tracing, not pinout verification.
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