Which of these is mandatory when configuring Cisco IOS Firewall? ()
- A、Cisco IOS IPS enabled on the untrusted interface
- B、NBAR enabled to perform protocol discovery and deep packet inspection
- C、a route map to define the trusted outgoing traffic
- D、a route map to define the application inspection rules
- E、an inbound extended ACL applied to the untrusted interface
正确答案:E
答案解析:有

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