A  is correct because you can deploy only stateless firewall filters on an EX Series switch.  A stateless firewall filter is a filter that evaluates each packet individually based on the header information, such as source and destination addresses, protocol, and port numbers 1 .  A stateless firewall filter does not keep track of the state or context of a packet flow, such as the sequence number, flags, or session information 1 .  EX Series switches support only stateless firewall filters, which are also called access control lists (ACLs) or packet filters 2 .

C  is correct because you can apply firewall filters to both Layer 2 and Layer 3 traffic on an EX Series switch.  Layer 2 traffic is traffic that is switched within a VLAN or a bridge domain, while Layer 3 traffic is traffic that is routed between VLANs or networks 3 .  EX Series switches support three types of firewall filters: port (Layer 2) firewall filters, VLAN firewall filters, and router (Layer 3) firewall filters 4 . You can apply these filters to different interfaces and directions to control the traffic entering or exiting the switch.