单选题A packet is evaluated against three user-defined terms within a firewall filter and no match is found. What correctly describes the action the firewall filter will take for this packet?（）AThe filter will permit the packet and take no additional actionBThe filter will reject the packet and send an ICMP message back to the senderCThe filter will discard the packet and take no additional actionDThe filter will permit the packet and write a log entry to the firewall log
单选题
A packet is evaluated against three user-defined terms within a firewall filter and no match is found. What correctly describes the action the firewall filter will take for this packet?（）
A
The filter will permit the packet and take no additional action
B
The filter will reject the packet and send an ICMP message back to the sender
C
The filter will discard the packet and take no additional action
D
The filter will permit the packet and write a log entry to the firewall log
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