Following ticket consists of a problem description and existing configuration on the device. Figure 1 Cisco 642-832： Practice Exam Figure 2 Trouble Ticket Statement： 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 Configuration on R1： router ospf 1 CertKiller.com log-adjacency-changes network 10.1.1.0 0.0.0.3 area 12 default-information originate always! interfaceSerial0/0/0/0.12 point-to-point ip address 10.1.1.1 255.255.255.252 ip nat inside ip ospf message-digest-key 1 md5 TSHOOT Configuration on R2： router ospf 1 log-adjacency-changes network 10.1.1.0 0.0.0.3 area 12! Cisco 642-832： Practice Exam interfaceSerial0/0/0/0.12 point-to-point ip address 10.1.1.2 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 TSHOOTOn  which device is the fault condition located？（）

• A、R1
• B、R2
• C、DSW1
• D、Client1