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单选题
What is the purpose of an explicit "deny any" statement at the end of an ACL?()
A

none,since it is implicit

B

to enable Cisco IOS IPS to work properly;however,it is the deny all traffic entry that is actually required

C

to enable Cisco IOS Firewall to work properly;however,it is the deny all traffic entry that is actually required

D

to allow the log option to be used to log any matches

E

to prevent sync flood attacks

F

to prevent half-opened TCP connections


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考题 单选题What is the purpose of an explicit "deny any" statement at the end of an ACL?()A none,since it is implicitB to enable Cisco IOS IPS to work properly;however,it is the deny all traffic entry that is actually requiredC to enable Cisco IOS Firewall to work properly;however,it is the deny all traffic entry that is actually requiredD to allow the log option to be used to log any matchesE to prevent sync flood attacksF to prevent half-opened TCP connections

考题 单选题A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?()A access-list 101 deny tcp 192.168.1.128 0.0.015 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any anyB access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23 access-list 1 permit ip any anyC access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21 access-list 1 permit ip any anyD access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any anyE access-list 101 deny ip 192.168.1.128 0.0.0.240 192.158.1.5 0.0.0.0 eq 23 access-list 101 permit ip any anyF access-list 101 deny ip 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any