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1. The structured network troubleshooting process is triggered by a fault report. The basic principle is to simplify troubleshooting by narrowing down or isolating all possible causes of a fault into several small subsets.
In what sequence are structured network troubleshooting steps carried out?
1. Information collection
2. Fault identification
3. Cause list
4. Troubleshooting assessment
5. Fault analysis
6. One-by-one check
7, Fault rectification
A) 1->2->3->6->5->4->7
B) 2->1->3->5->6->4->7
C) 1->2->3->6->4->5->7
D) 2->1->5->3->4->6->7
2. In a complex network environment containing finance, OA, production, and more service systems, which of the following items is the first concern for troubleshooting?
A) Network device model
B) Data flow direction of each service system
C) Equipment room environment
D) IP address assignment
3. Which of the following operations is unnecessary to resolve a failure for hosts in the same VLAN to communicate with each other?
A) Run the display vlan vlan-id command in any view to check whether the VI-AN for communication interfaces has been created.
B) Run the display current-configuration command to check the PCB version and the software version of a card.
C) Run the display interface interface-type interface-number command in any view to check the status of communication interfaces.
D) Run the display mac-address command on the switch to check MAC address entries including the MAC address, port number, and VLAN ID.
4. Which of the following statements regarding the device software upgrade feasibility is true?
A) Before performing a major upgrade or complex upgrade operations, you need to conduct commissioning and test the upgrade plan and contingency plan in the simulation environment.
B) Generally, the device software upgrade does not affect the stable network running. Therefore, risk assessment and avoidance are not required before the upgrade.
C) The upgrade only causes service interruption for a very short time. Therefore, you do not need to confirm with the customer about the upgrade, improving efficiency.
D) To ensure the stable running of network devices, you are advised to upgrade the device software in a timely manner.
5. Which of the following protocols can be deployed to quickly detect network link faults?
A) RSTP
B) BFD
C) Smart-Link
D) iSPF
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: B | Question # 3 Answer: B | Question # 4 Answer: A | Question # 5 Answer: B |
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