Coaxial cables are used to carry video signals of cable TVs but not data signals.

• A.TRUE
• B.FALSE

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Current enterprise networks usually use OSPF as the routing protocol. What precautions are there when OSPF is used? (Multiple Choice)

• A.Check whether secondary optimal routes exist on the network according to OSPF route selection rules.
• B.Check the OSPF network topology and ensure that no loop exists when OSPF routes are being calculated.
• C.Check whether all non-backbone areas are correctly and reliably connected to the backbone area.
• D.Verify that OSPF costs can correctly demonstrate the actual bandwidth of links at more than 100 Mbit/s.
• E.Determine that the backbone area will not split.

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Which of the following statements regarding the device environment check is true?

• A.Devices should be placed stably in flat positions in a ventilated and dry environment, and only a few sundries can be placed around the devices.
• B.When the grounding mode and the grounding resistance are checked, the working ground, protection ground, and building lightning protection ground should be separately configured in the equipment room.
• C.It is recommended that power cables and service cables be placed together in a neat and orderly manner.
• D.For energy saving, the current temperature and humidity in the equipment room must meet requirements of devices. Air conditioners are not required to run continuously and stably.

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Which of the following is the core idea of network troubleshooting?

• A.Service traffic path check
• B.Information collection
• C.Determining and analysis
• D.Top-down

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During the structured network troubleshooting process, which of the following statements regarding the fault identification phase is true?

• A.Check whether the troubleshooting is within your own responsibility scope.
• B.To minimize the fault effect, try not to let others know the network fault.
• C.Focus on how to better solve faults, regardless of whether a fault is within your own responsibility scope.
• D.Pay attention to user feedback and identify faults based on user feedback.

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