Which configuration must the engineer use?

An engineer must apply an 802.1ad-compliant configuration to a new switchport with these requirements:

✑ The switchport must tag all trame when it enters the port

✑ The switchport Is expected to provide the same level of service to traffic from any customer VLAN

Which configuration must the engineer use?
A . interface GigabitEthernet1/0/1
switchport mode trunk
switchport trunk encapsulation dot1q
encapsulation ISL
bridge-domain 12
B. interface GigabitEthernet1/0/1
ethernet dot1ad uni c-port
service instance 12
encapsulation dot1q
rewrite ingress tag push dot1ad 21 symmetric
bridge-domain 12
C. interface GigabitEthernet1/0/1
ethernet dot1ad uni s-port
service instance 12
encapsulation default
rewrite ingress tag push dot1ad 21 symmetric
bridge-domain 12
D. interface GigabitEthernet1/0/1
ethernet dot1ad nni
service instance 12
encapsulation dot1ad
bridge-domain 12

View Answer

Answer: C

Explanation:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/16-12-1/b-ce-xe-16-12-asr900/m_ce_802_1ad_900.html