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Exam DEA-1TT4 topic 1 question 3 discussion

Actual exam question from Dell's DEA-1TT4
Question #: 3
Topic #: 1
[All DEA-1TT4 Questions]

An Ethernet switch has eight ports and all ports must be operational for 24 hours, from Monday through Friday. However, a failure of Port4 occurs as follows:
"¢ Monday = 8 PM to 9 PM
"¢ Wednesday 7 PM to 9 PM
"¢ Thursday = 6 AM to 9 AM
"¢ Saturday = 4 PM to 7 PM
What is the MTTR of Port 4?

  • A. 2 hours
  • B. 3 hours
  • C. 28 hours
  • D. 38 hours
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by madmax67 at Oct. 19, 2020, 10:34 a.m.

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Varunraj
Highly Voted 4 years, 1 month ago
No need to consider the downtime for Saturday since the question mentioned about Monday to Friday. So MTTR will be 6h downtime/3 incidents = 2
upvoted 18 times
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SupremeND
Most Recent 2 years, 4 months ago
Selected Answer: A
MTTR=total time to repair/number of incidents=6/3=2
upvoted 1 times
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zahidhkhader
2 years, 11 months ago
Selected Answer: A
Monday to Friday. So MTTR will be 6h downtime/3 incidents = 2
upvoted 1 times
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Mahrizou
3 years, 8 months ago
MTBF: Average time available for a system or component to perform its normal operations between failures  MTBF= Total uptime / Number of failures MTTR: Average time required to repair a failed component  MTTR = Total downtime / Number of failures
upvoted 2 times
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madmax67
4 years, 3 months ago
MTTR = Meantime to Repair. ISMv4 PArticipant Guide: MTTR: Average time required to repair a failed component MTTR = Total downtime / Number of failures Given downtimes per failure: 8 to 9 PM = 1h 7 to 9 PM = 2h 6 to 9 AM = 3h 4 to 7 PM = 3h Calculation: 9h downtime / 4 incidents = 2,25h MTTR Conclusion: 2 h 15 m should be the correct answer.
upvoted 3 times
bobbyzee
3 years, 6 months ago
Downtime between Mon - Fri only. So only 6 hours /3 failures = 2 hours
upvoted 4 times
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nicefella
4 years, 1 month ago
Kindly send me a copy of the ISMv4 Participant Guide.Thanks.
upvoted 1 times
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hizohizo15
2 years, 11 months ago
its monday to friday...so only 6hrs downtime..dont include saturday..
upvoted 1 times
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