When designing the security for a service provider core router, you are asked to add a firewall fitter on the to0 interface in this scenario, which two protocols would you want to allow through the filter? (Choose two.)

When designing the security for a service provider core router, you are asked to add a firewall fitter on the to0 interface in this scenario, which two protocols would you want to allow through the filter? (Choose two.)
A . LLDP
B . SSH
C . BGP
D . STP

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Answer: A,C