【2011.6.11】CCNA（640-802）题库V104.4每日一新题(最新考试真题)

goodluck · 发表于 2011-6-11 09:20:53

本帖最后由 goodluck 于 2011-6-13 08:59 编辑

CCNA（640-802）题库V104.4每日一新题（最新考试真题）

CCNA题库每日一新题是以v104.4为基础，发布v104.4中未包含的，但是在近期考试中出现的考场真题，在此感谢那些能第一时间把新题目带回来的考生，是你们的默默奉献，让别人的CCNA旅程更加平坦一些，同时正在备考的同学要加油了，站在巨人的肩膀上，我们会看的更高！

Refer to the exibit .An attempt to deny web access to a subnet blocks all traffic from the subnet.Which interface command immedicately removes the effect of ACL 102?

A. no ip access-group 102 in

B. no ip access-group 102 out

C. no ip access-list 102 in

D. no ip access-class 102 out

E. no ip access-class 102 in

。。。。。。。。。。。。。
答案 B
B 移去访问控制列表102的拒绝TCP服务
D 、E的access class 命令，telnet到路由器的包才会被查看合比较。与题目很明显无关。
模拟实验如下，可以证明选 B没错
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#access-list 102 deny tcp 172.21.1.1 0.0.0.255 any eq 80
Router(config)#access-list 102 deny ip any any
Router(config)#int fa 0/0
Router(config-if)#ip access-group 102 out
Router(config-if)#do show ip int
FastEthernet0/0 is up, line protocol is up (connected)
Internet address is 192.168.33.254/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is 102
Inbound access list is not set
Proxy ARP is enabled
感谢论坛会员
月易真象
likaiwei1990

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月易真象 · 发表于 2011-6-11 09:34:50

outgoing access-list is 102
就根据这，选B

月易真象 · 发表于 2011-6-11 09:37:54

D 、E的access class 命令，telnet到路由器的包才会被查看合比较。与题目很明显无关。

月易真象 · 发表于 2011-6-11 09:45:48

本帖最后由月易真象于 2011-6-11 09:49 编辑

模拟实验如下，可以证明选 B没错
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#access-list 102 deny tcp 172.21.1.1 0.0.0.255 any eq 80
Router(config)#access-list 102 deny ip any any
Router(config)#int fa 0/0
Router(config-if)#ip access-group 102 out
Router(config-if)#do show ip int
FastEthernet0/0 is up, line protocol is up (connected)
  Internet address is 192.168.33.254/24
  Broadcast address is 255.255.255.255
  Address determined by setup command
  MTU is 1500
  Helper address is not set
  Directed broadcast forwarding is disabled
  Outgoing access list is 102
  Inbound  access list is not set
  Proxy ARP is enabled

月易真象 · 发表于 2011-6-11 09:48:39

接着使用 no ip access-group 102 out命令，结果如下
Router(config-if)#no ip access-group 102 out
Router(config-if)#do sh ip int
FastEthernet0/0 is up, line protocol is up (connected)
  Internet address is 192.168.33.254/24
  Broadcast address is 255.255.255.255
  Address determined by setup command
  MTU is 1500
  Helper address is not set
  Directed broadcast forwarding is disabled
  Outgoing access list is not set
  Inbound  access list is not set
  Proxy ARP is enabled

微博评论 · 发表于 2011-6-11 10:53:52

答案是？

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num520 · 发表于 2011-6-11 11:07:10

Done3 · 发表于 2011-6-11 16:46:28

121872474 · 发表于 2011-6-11 19:47:36

选B

s3811357 · 发表于 2011-6-11 20:30:34

选B

likaiwei1990 · 发表于 2011-6-11 23:42:23

B 移去访问控制列表102的拒绝TCP服务

wjhrg2010 · 发表于 2011-6-12 10:03:58

选择B

tiantangheng · 发表于 2011-6-12 11:05:10

选B

123456queyi · 发表于 2011-6-12 11:25:59

谢谢楼主的无私分享精神。

rebecca · 发表于 2011-6-12 15:15:55

我也是认为选B

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