What functionality does the control layer provide in a software-defined networking architecture?
The Ethernet switch has eight ports and all ports must be operational for 24 hours, from Monday through Friday. However, a failure of Port 4 occurs as follows:
Monday = 8 PM to 11 PM -
Wednesday = 7 PM to 10 PM -
Thursday = 6 AM to 12 PM -
What is the MTTR of Port 4?