What is the purpose of an explicit "deny any" statement at the end of an ACL？（）
- Anone，since it is implicit
- Bto enable Cisco IOS IPS to work properly；however，it is the deny all traffic entry that is actually required
- Cto enable Cisco IOS Firewall to work properly；however，it is the deny all traffic entry that is actually required
- Dto allow the log option to be used to log any matches
- Eto prevent sync flood attacks
- Fto prevent half-opened TCP connectio