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單項選擇題

Which item is correct regarding Cisco IOS IPS on Cisco IOS Release 12.4(11)T and later ?()

A.requires the Basic or Advanced Signature Definition File
B.uses the built-in signatures that come with the Cisco IOS image as backup
C.supports SDEE,SYSLOG,and SNMP for sending Cisco IPS alerts
D.uses Cisco IPS 5.x signature format

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