CompTIA Network+ Certification Exam N10-009 Practice Test 21

Each PoE device connected to a switch consumes a certain amount of power. A power budget represents the maximum electrical power a PoE switch can supply to its connected devices. The total power consumption of all connected devices must not surpass the switch's power budget. True or False?

• True

• False

Which troubleshooting step would not be helpful in resolving the issue of the total power consumption of connected PoE devices exceeding the available power budget of a PoE switch?

• Checking the total power budget of the PoE switch and the power requirements of all connected devices

• Using a multimeter to measure and verify the power consumption of individual devices

• Disconnecting non-essential PoE devices to reduce the load on the power budget

• Upgrading to a PoE switch with a higher power budget or adding an external PoE injector if necessary

• Ensuring the switch's firmware is up to date, as it can improve power consumption metrics in some cases.

Which tool would be used to verify compatibility between the PoE standard supported by the PoE switch and the connected PoE devices?

• PoE tester

• Cable certifier

• Power meter

A network technician is troubleshooting a newly installed 40 Gbps fiber link between two switches. Despite verifying that the cable is correctly connected, the interfaces are enabled, and the cable length is within the supported range, the link remains down. Upon inspection, it is discovered that one end of the link uses an SFP module, while the other end uses a QSFP module. What is the most probable cause of the issue?

• Transceiver mismatch

• Network congestion causing link failure

• Interface duplex mismatch

• Faulty SFP/QSFP module

Which of the answers listed below refers to a tool used for troubleshooting signal strength issues in fiber-optic network links?

• Wire map tester

• Signal tracer

• Optical power meter

• Spectrum analyzer

Which troubleshooting tool would be used to test and verify signal quality for a copper-based Ethernet network link?

• Network tap

• Cable tester

• Multimeter

• Tone generator

Which of the following would be of help in troubleshooting wireless signal strength issues?

• Wireless site survey

• AP power level controls

• Wi-Fi analyzer

• Network heatmap generator

• All of the above

A condition in which multiple active paths between switches are causing packets to circulate endlessly is called a:

• Routing loop

• Broadcast storm

• Network loop

• Flooding attack

Which of the protocols listed below provide protection against broadcast storms and switching loops? (Select 2 answers)

• SRTP

• BPDU

• STP

• LLDP

• RSTP

Which of the following answers does not describe the role of a root bridge?

• Ensures there is only one active path between any two devices

• Helps prevent network loops

• Decides the optimal paths for data to travel

• Serves as the reference point for all other switches in the network

• Balances the network load between other switching devices