单选题

试题出自试卷《H12-821真题（二十六）最新出的新题》

已知路由器R1存在Loopback0且地址为1.1.1.1/32，在使能ospf并引入直连路由时会把该环回口引入。那么以下哪一项的配置能够实现在引人直连路由时,Loopback0不会被引入。并能够保证其他直连路由引入到OSPF内?

问题1选项
A.[Huawei]acl 2001[Huawei-acl-basic-2001]rule 5 permit source 1.1.1.1 255.255.255.255[Huawei-acl-basic-2001]quit[Huawei]route-policy 1 deny node 1[Huawei-route-policy]if-match acl 2001[Huawei-route-policy]quit[Huawei]route-policy 1 permit node 2[Huawei-route-policy]quit[Huawei]ospf 1[Huawei-ospf-1]import-route direct route-policy 1
B.[Huawei]acl 2001[Huawei-acl-basic-2001]rule 5 permit source 1.1.1.1 255.255.255.255[Huawei-acl-basic-2001]rule 10 permit source any[Huawei-acl-basic-2001]quit[Huawei]route-policy 1 deny node 1[Huawei-route-policy]if-match acl 2001[Huawei-route-policy]quit[Huawei]ospf 1[Huawei-ospf-1]import-route direct route-policy 1
C.[Huawei]acl 2001[Huawei-acl-basic-2001]rule 5 permit source 1.1.1.1 0.0.0.0[Huawei-acl-basic-2001]quit[Huawei]route-policy 1 deny node 1[Huawei-route-policy]if-match acl 2001[Huawei-route-policy]quit[Huawei]ospf 1[Huawei-ospf-1]import-route direct route-policy 1
D.[Huawei]acl 2001[Huawei-acl-basic-2001]rule 5 permit source 1.1.1.1 0.0.0.0[Huawei-acl-basic-2001]rule 10 permit source any[Huawei-acl-basic-2001]quit[Huawei]route-policy 1 deny node 1[Huawei-route-policy]if-match acl 2001[Huawei-route-policy]quit[Huawei]ospf 1[Huawei-ospf-1]import-route direct route-policy 1

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