Free Network Tools and Hands-On Diagnostics practice questions
10 free 220-1201 questions on Network Tools and Hands-On Diagnostics, each with a full explanation — no account needed. This section sits in the Networking part of the exam. Answer every question to see your score, then read the lessons below for anything you missed.
A technician needs to re-terminate a damaged Ethernet cable end where the RJ-45 latch broke and the connection drops when the cable is moved. Which tool is required to attach a new RJ-45 plug correctly?
A crimper is used to attach an RJ-45 plug to twisted-pair cable by pressing the plug’s pins into the conductors and locking the strain relief. Punchdown tools are for jacks and patch panels, while toner probes and Wi-Fi analyzers serve different troubleshooting roles.
A technician is troubleshooting random Ethernet drops. Visual inspection shows the cable jacket is not secured under the RJ-45 strain relief, and only the individual conductors appear clamped. Which tool use is most directly associated with preventing this failure during termination?
When attaching an RJ-45 plug, the crimper ensures the pins contact the conductors and the strain relief holds the jacket. If the jacket is not secured, minor movement can stress the conductors and cause intermittent drops.
A newly installed Cat 6 run passes the wire-map test on a basic cable tester, yet the workstation on it negotiates only 100 Mbps and logs CRC errors whenever gigabit is forced. The customer wants proof that the run meets the Cat 6 specification before paying the installer. Which tool provides that proof?
A wire-map pass only proves each pin arrives at the right pin; it says nothing about crosstalk, attenuation, or return loss, which are what make a run fail at gigabit speeds. A certifier performs those measurements and produces a pass/fail report against the category standard, which is the evidence the customer is asking for. A toner probe identifies which cable is which and tests nothing. A loopback plug checks the switch port, not the cabling. Running the same basic tester again would simply repeat the pass that already missed the problem.
A technician wants to avoid damaging conductors during cable preparation because a small nick can later cause intermittent errors after bending. Which tool choice and goal best match this risk?
Cable strippers are designed to remove the jacket cleanly while protecting the inner wires. Avoiding nicks is critical because damaged strands or insulation can lead to unstable links and errors even if the cable initially appears functional.
A technician is capturing traffic from a busy server uplink through a switch SPAN (port mirror) session, but the capture is missing frames every time utilization spikes, and the intermittent fault only appears during those spikes. Which change gives a complete capture?
A SPAN session is a low-priority copy made by the switch, and when the switch is busy it drops mirrored frames rather than production traffic, so the capture goes blind at exactly the wrong moment. A tap sits in the physical path and copies every bit regardless of switch load, which is why it is the tool for intermittent faults under load. A second mirror session shares the same overloaded switch and often is not even permitted for the same source port. A smaller capture buffer makes drops worse, not better. The cable is not the problem; the frames are lost inside the switch.
A technician is terminating structured cabling into a patch panel in a wiring closet. The terminations use insulation-displacement connectors and the goal is to seat each wire and trim the excess cleanly. Which tool should be used?
Patch panels and keystone jacks typically use IDC terminations. A punchdown tool seats each conductor into its slot and usually trims the wire, creating a reliable structured cabling termination.
A Wi-Fi analyzer survey of a small office shows the company’s 2.4 GHz access point on channel 3, while the two neighboring businesses are on channels 1 and 6. Users near the shared wall complain of slow, unstable Wi-Fi. Based on this evidence, what should the technician do?
In the 2.4 GHz band only channels 1, 6, and 11 do not overlap. An access point on channel 3 partially overlaps both 1 and 6, so it suffers interference from both neighbors and causes some for them; moving to the free non-overlapping channel, 11, removes the overlap. Channel 4 still overlaps channels 1 and 6. More transmit power does not remove co-channel interference and worsens it for everyone. Turning off 5 GHz pushes more clients into the crowded band, the opposite of what the survey suggests.
A help desk ticket states that an Ethernet cable passed a basic continuity test, but users still report unstable performance at higher speeds. Which statement best reflects the limitation described for basic test results?
Basic cable testers focus on wire map and continuity. A cable can pass continuity yet still perform poorly due to termination quality, excessive untwist, or pair-related issues that affect higher-speed signaling, so a pass is not a complete guarantee of end-to-end performance.
A technician clips a tone generator onto a wall jack whose run terminates on a patch panel that is patched into a PoE switch port. The probe picks up almost no tone at the panel, and the technician is unsure whether the generator could be damaged. What should be done FIRST?
Toning is done on a dead run. A connected switch port loads the pair and soaks up the tone, so the probe hears little or nothing, and the DC voltage a PoE port can supply is enough to damage a tone generator. Disconnect the run from the switch first, then tone it. More probe volume cannot recover a signal the switch is absorbing. A fresh battery does not change the loading problem. Re-terminating the jack is destructive guesswork; the run has not been proven faulty.
A technician needs to determine whether a user’s network issue is caused by the wrong cable being patched in a closet rather than by a damaged cable. Which tool most directly reduces the risk of troubleshooting the wrong physical run?
A toner probe identifies which cable you are actually working with by tracing the run from one endpoint to the other. This prevents wasted effort fixing or testing the wrong cable when labels are missing or patching is incorrect.
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Every lesson that covers Network Tools and Hands-On Diagnostics on the 220-1201 exam.