Troubleshoot the Solution

HPE6-A85 · 50 questions

• A junior network engineer at a large teaching hospital is called to a single dark nurse-station wall port. Before touching any configuration, which step of a structured troubleshooting methodology should come first?
• After defining the problem and forming a working theory for why a lab MRI-suite switch stack lost half its ports, a technician at the hospital is ready to move forward. What should happen immediately after the theory of probable cause is established?
• A technician has tested and confirmed a theory that a failing uplink in the outpatient annex is caused by a bad fiber patch cord. What is the next correct step in the troubleshooting methodology before the fix is actually applied?
• A resolved trouble ticket for a repeated port flap on a cardiology ward access switch is about to be closed. Per structured troubleshooting methodology, what must still happen before closure?
• A help-desk call reports that a single infusion pump on a medical-surgical ward cannot join the network, while every other device on the same wall switch and the same wireless SSID is working fine. How should the technician scope this issue before digging further?
• Multiple staff across an entire hospital wing report they cannot join the guest Wi-Fi, while the clinical staff SSID on the same access points continues to work normally. What does this scoping detail suggest the technician should investigate first?
• A technician needs to decide whether a reported Wi-Fi slowness complaint in a hospital's imaging department is a single-client problem or something affecting the whole coverage area. Which action best establishes that scope?
• A link between two wiring-closet switches in a clinic wing passes traffic, but throughput crawls and several devices report intermittent retransmissions, while every other link in the building performs normally. Interface statistics on that one link show a steadily climbing count of late collisions. What does this specific counter point to as the underlying cause?
• A newly cabled infusion pump outlet in a hospital ward shows a persistently down link light, and a technician confirms the same patch cord tests fine at the workbench. What is the most likely physical-layer cause to check next?
• A biomedical engineer reports that three newly installed nurse-call panels on one hospital floor power on briefly, then reboot in a loop, all connected to the same PoE switch. What is the most likely physical-layer explanation?
• A wall-mounted vitals monitor at a hospital nurse station links up but never receives PoE power, even though the same cable and port worked for a laptop with an inline injector the day before. What physical-layer behavior should the technician suspect first?
• An uplink between a hospital ward's access switch and the building's distribution switch will not come up, and the technician notices the transceiver at one end is rated for single-mode fiber while the transceiver at the other end is rated for multi-mode fiber. What is the most likely cause?
• A hospital IT technician notices an unusually high count of CRC errors on the interface counters for a copper uplink connecting two wiring closets, even though the link stays up. What does this most likely indicate?
• A technician troubleshooting a slow file transfer to a radiology workstation notices the interface shows a high number of late collisions and the port is running at half duplex, while the connected switch port on the other end is configured for full duplex. What should the technician conclude?
• A technician cannot get link on a freshly punched-down jack for a new clinic exam room, but a cable tester shows continuity on all eight conductors. Tracing the run at the patch panel reveals the pairs were terminated in a different pin order than the standard used at the wall plate. What is the most likely explanation for the failed link?
• A newly onboarded workstation in a hospital billing office can reach devices on its local subnet but cannot reach anything beyond it, and the technician confirms the switch port is assigned to VLAN 20 while the router's corresponding subinterface is configured for VLAN 30. What is the most accurate description of this fault?
• After a trunk link is reconfigured between a hospital ward's access switch and its distribution switch, staff report that devices on VLAN 40 can reach the rest of the network but devices on VLAN 50 cannot, even though both VLANs are configured and active on both switches. What should the technician check on the trunk?
• Two switches connected by a trunk link in a hospital's east wing begin dropping intermittent untagged traffic, and the technician discovers one switch has its trunk's native VLAN set to VLAN 1 while the other has it set to VLAN 99. What kind of fault is this?
• A hospital's IT team notices that a redundant link between two wiring-closet switches is sitting in a blocking-like state, and network monitoring shows an unusually high count of topology change notifications over the past hour. What is the most likely explanation?
• A hospital ward suddenly experiences widespread slowness, and the technician observes an extremely high volume of broadcast traffic along with rapidly incrementing MAC address table changes on multiple switches at once. What condition does this pattern most strongly suggest?
• A newly configured link aggregation group between a hospital's core switch and a ward's distribution switch fails to bundle, with only one of the two intended member links passing traffic. The technician finds one switch configured for active LACP while the other switch has the matching ports configured as a static, non-negotiated aggregate. What is the most likely cause?
• A four-member link aggregation group connecting a hospital's biomedical engineering lab to the core has been running normally, but staff now report noticeably slower transfers, and the technician finds that one of the four member interfaces has gone down. What is the most accurate description of the resulting condition?
• A technician reviewing a hospital ward's access switch notices the same MAC address rapidly appearing and disappearing from different ports in the MAC address table within seconds of each other. What does this behavior most likely indicate?
• A technician troubleshooting intermittent unicast flooding on a hospital ward's switch notices that a workstation's MAC address keeps disappearing from the switch's MAC address table between periods of activity, forcing the switch to flood its traffic to every port on the VLAN. What is the most likely explanation?
• A wireless access point mounted in a new hospital clinic wing associates clients successfully, but every client that connects to the staff SSID ends up unable to reach any campus resources, while the same AP's guest SSID works normally. The technician confirms the AP's wired uplink port on the switch has only the guest VLAN in its allowed-VLAN list. What is the fault?
• A new medical-surgical ward opens with 40 workstations on VLAN 120. Within the first hour, several new PCs fail to obtain an IP address while PCs that were already powered on before the rollout keep working fine. What is the most likely cause?
• Staff workstations on the oncology ward VLAN can reach printers and file shares on the same VLAN, but none of them can reach the pharmacy server on a different subnet or browse the internet. What should you check first?
• A nurse reports that a workstation cannot open the hospital's intranet page by typing its hostname, but pinging the same server's IP address works without any packet loss. What does this indicate?
• After a fiber link is brought up to the new outpatient annex across the road, staff at the annex can reach devices on their own local subnet but cannot reach any server on the main hospital campus. Pinging the annex's own default gateway succeeds. What is the most likely gap?
• Nurses on a med-surg ward can ping the electronic health records (EHR) application server without any loss, but the EHR client software itself times out and never loads a patient chart. Other applications on the same server, using different ports, work normally. What should you investigate first?
• A newly added VLAN for nurse-call system controllers sits on a switch several hops from the DHCP server, which lives on the core VLAN. None of the controllers receive an IP address, even though the VLAN and its interface are both configured and up. What is most likely missing?
• A radiology workstation can send traffic to a research server on a partner network, confirmed by a packet capture at the server showing the requests arriving, but the workstation never receives any response and the connection eventually times out. What kind of problem does this describe?
• Staff in the radiology suite consistently report no Wi-Fi signal in one specific room used for MRI scans, while adjacent rooms show strong coverage from the same AP. What is the most likely explanation?
• Users in a busy nurses' station report slow and unreliable Wi-Fi even though signal strength readings show strong coverage from two nearby access points. A site survey shows both APs are set to the same 20 MHz channel. What is the most likely cause of the slowness?
• A charge nurse's laptop stays connected to the AP near the elevator lobby with a very weak signal even after she has walked well into the ICU, passing directly under an AP with a much stronger signal. What wireless behavior does this describe?
• Physicians using voice-over-Wi-Fi handsets frequently have their calls drop while walking the covered walkway between the main hospital building and the outpatient annex, even though signal strength stays above the minimum needed at every point along the walk. What is the most likely cause?
• A visitor's laptop successfully associates to the hospital's guest SSID and shows a strong signal, but it cannot load any web page, including the guest Wi-Fi login portal. Other visitors nearby using the same SSID are browsing normally. What should you check first?
• Starting at 8 a.m., every workstation across the hospital campus attempting 802.1X authentication on the wired network fails and falls back to no network access, while devices already authenticated before 8 a.m. remain connected normally. What is the most likely cause?
• A biomedical infusion pump is swapped for a replacement unit and plugged into the same wall jack that worked fine for the old pump, but the new pump gets no network connectivity at all and the switch port's link light stays off. Other ports on the same switch are unaffected. What is the most likely explanation?
• A physician's tablet, previously able to authenticate seamlessly to the clinical Wi-Fi network using certificate-based authentication, suddenly begins failing every connection attempt with an authentication error after IT rotates the network's authentication certificates. What is the most likely explanation, at a conceptual level?
• After correcting a VLAN mismatch that was preventing a newly deployed clinic wing's workstations from reaching the pharmacy server, what is the best way to validate that the fix actually resolved the issue before closing the ticket?
• Visitors in the hospital lobby can associate to the guest Wi-Fi SSID and their devices show they received a valid IP address, but the captive portal page never appears in their browser no matter what website they try to load. What is the most likely cause?
• An infusion pump on its dedicated biomedical VLAN cannot reach the nurse-call integration server, which lives on a separate VLAN, even though both devices show correct IP addressing and both VLANs route successfully to other destinations. What should be checked next?
• During peak visiting hours, dozens of visitor devices connect to the guest SSID in the main waiting room, and users begin reporting slow web browsing even though the access point shows strong signal to every connected client. What is the most likely explanation?
• After enlarging the DHCP scope for a ward VLAN that had run out of addresses, what is the best way to validate that the fix has actually resolved the exhaustion issue?
• Devices connecting to wired ports in the biomedical engineering lab are failing 802.1X authentication intermittently, roughly once every few minutes, while devices in other parts of the hospital authenticate without issue during the same window. What should be investigated?
• A patient monitoring device on a med-surg ward authenticates and is dynamically placed on the general guest VLAN instead of the clinical device VLAN, leaving it unable to reach the electronic health records server it needs to report vitals to. Other clinical devices in the same ward correctly land on the clinical VLAN. What is the most likely explanation?
• A large diagnostic imaging file transfer from a workstation to the PACS server hangs partway through and eventually times out, while a ping to the same server with default-sized packets succeeds with no loss. Smaller file transfers to the same server complete without issue. What does this pattern most strongly suggest?
• After adding a supplemental access point inside the MRI suite to resolve a coverage dead zone, what is the most effective way to validate that the fix actually restored usable Wi-Fi coverage in that room?
• After identifying and correcting a missing DHCP relay address as the cause of nurse-call controllers failing to get IP addresses, what is the last step that should be completed before considering the issue fully resolved?