2. 计算机
  3. Refer to the exhibit．Statements A,B,C,and D of ACL 10 have been entered in the shown order and app;ied to interface E0 inbound,t

Refer to the exhibit．Statements A,B,C,and D of ACL 10 have been entered in the shown order and app;ied to interface E0 inbound,t

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问题 Refer to the exhibit．Statements A,B,C,and D of ACL 10 have been entered in the shown order and app;ied to interface E0 inbound,to prevent all hosts(except those whose addresses are the first and last IP of subnet 172．21．1．128/28) from accessing the network．But as is,the ACL dose not restrict anyone from the network．How can the ACL statements be re-arranged so that the system works as intended?
选项 A、        CDBA
B、        DBAC
C、        ACDB
D、        BADC
答案A
解析 每个访问列表的最后一行隐含“deny”语句。
因此要在访问列表末尾使用“permit any”命令。
每个列表应当至少有一个允许语句，否则将会拒绝所有流量。
所以，BCD错。
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