Dell EMC Associate – Information Storage and Management v4 — Question 11

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?

Answer options

Correct answer: A

Explanation

The MTTR is calculated by adding the total downtime of Port 4 during its failures. It failed for 1 hour on Monday, 2 hours on Wednesday, and 3 hours on Thursday, totaling 6 hours. However, since the question specifies only the weekdays, we consider the failures only within those days, leading to a correct MTTR of 2 hours when excluding the weekend failure times.