Dell-EMC
D-ISM-FN-01 · Question #557
An Ethernet switch has eight ports and all ports must be operational for 24 hours; from Monday through Friday. However, a failure of Port 5 occurs as follows: - Tuesday = 6 AM to 7 AM - Thursday = 5…
The correct answer is C. 40 hours. See the full explanation below for the reasoning.
Storage System Environment
Question
An Ethernet switch has eight ports and all ports must be operational for 24 hours; from Monday through Friday. However, a failure of Port 5 occurs as follows:
- Tuesday = 6 AM to 7 AM
- Thursday = 5 PM to 9 PM
- Friday = 8 AM to 9 AM
What is the MTBF of Port 5?
Options
- A30 hours
- B32 hours
- C40 hours
- D38 hours
How the community answered
(15 responses)- A7% (1)
- B7% (1)
- C73% (11)
- D13% (2)
Topics
#MTBF#availability calculation#reliability metrics#port failure analysis
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