Crom Caterers is an old client of HW Internet Solutions. Crom's IT department calls HW Solutions to inform that the interface is down. HW Solutions sends a network analyst to check the situation. The network analyst assumes that an employee must have shut down the interface. He applies the show interface command to get an overview of all the devices interfaces. Which one of the following will help the network analyst to know whether the interface was shut down?

a$.$

Link state

b$.$

MTU $($Maximum Transmission Unit$)$

c$.$

Bandwidth

d$.$

Traffic statistics