【单选题】
Following ticket consists of a problem description and existing configuration on the device.<br /> <img src="https://nimg.ppkao.com/2018-07/tangxueping/201807241445507251.jpg?sign=4e623f0111faae0e57fc309db63014c0&t=62d0767a" /><br /> Figure 1<br /> Cisco 642-832： Practice Exam<br /> <img src="https://nimg.ppkao.com/2018-07/tangxueping/2018072414461410178.jpg?sign=2a76328956b8ea966fe2e360bdb30e07&t=62d0767a" /><br /> Figure 2<br /> Trouble Ticket Statement：<br /> Client 1 is able to ping 10.1.1.2 but not 10.1.1.1. Initial troubleshooting shows that R1 does not have anyOSPF neighbors or any OSPF routes<br /> Configuration on R1：<br /> router ospf 1<br /> CertKiller.com<br /> log-adjacency-changes<br /> network 10.1.1.0 0.0.0.3 area 12<br />
A、ipospf authentication message-digestcommand has to be added on S0/0/0/0.12
B、ipospf authentication message-digestcommand has to be added under the OSPF routing process
C、A static route to 10.1.1.4 must be added on R1
D、ipnat outside must be added on S0/0/0/0.12
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