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 Fibre Channel switch has eight ports and all ports must be operational 24x7. However, a failure of Port 5 occurs on a particular week as follows:
* Monday = 11 AM to 12 PM
* Thursday = 7 AM to 11 AM
* Saturday = 11 AM to 1 PM
What is the availability of Port 5 in that week?

In an FC SAN environment, which security mechanism prevents a switch port from being enabled even after a switch reboot?

Which type of storage system is built specifically for storing fixed content?