Refer to the exhibit. Communication between London and New York is down. Which command set must be applied to resolve this issue?
A. NewYork(config)#int f0/1
NewYork(config)#switchport nonegotiate
NewYork(config)#end
NewYork#
B. NewYork(config)#int f0/1
NewYork(config)#switchport mode trunk
NewYork(config)#end
NewYork#
C. NewYork(config)#int f0/1
NewYork(config)#switchport trunk encap dot1q
NewYork(config)#end
NewYork#
D. NewYork(config)#int f0/1
NewYork(config)#switchport mode dynamic desirable
NewYork(config)#end
NewYork#
It’s C. Port in New York is in auto so it can negotiate access or trunk mode. The issue is the encapsulation that is ISL on that end (Cisco default encapsulation). Encapsulation must be dot1q.