题目详情

访问控制列表(ACL)配置如下,如果来自因特网的HTTP报文的目标地址是162.15.10.10,经过这个ACL过滤后会出现什么情况 (  )。

中级网络工程师,历年真题,2015年上半年(上午)《网络工程师》真题

  • A.由于行30拒绝,报文被丢弃
  • B.由于行40允许,报文被接受
  • C.由于ACL末尾隐含的拒绝,报文被丢弃
  • D.由于报文源地址未包含在列表中,报文被接受

正确答案及解析

正确答案
C
解析

通过题干可以看出,源IP是所以的IP,目标IP为162.15.10.10,通过ACL中匹配,未有匹配上的条目,因此由ACL最后有一条拒绝所有的隐形条目匹配,所以最后报文被丢弃。

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