Dell EMC Associate – Information Storage and Management v4 — Question 19

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?

Answer options

Correct answer: C

Explanation

The MTBF is calculated by assessing the total operational time divided by the number of failures. In this case, Port 5 was down for a total of 4 hours over the week, resulting in an MTBF of 40 hours when considering the 96 hours of operational time from Monday to Friday.