When logging is used, which severity level indicates that a device is unusable?
- Level 0—Emergency
- Level 1—Alert
- Level 2—Critical
- Level 3—Error
Explanation: The smaller the level numbers, the more critical the alarms. Emergency —Level 0 messages indicate that the system is unusable. This would be an event that has halted the system. Alert—Level 1 messages indicate that immediate action is needed, such as a failed connection to the ISP. Critical—Level 2 messages indicate a critical condition. An example would be the failure of a backup connection to the ISP. Error—Level 3 messages indicate an error condition, such as an interface that is down.
Exam with this question: CCNA 2 v6 Chapter 10: Check Your Understanding
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