【名词&注释】
心肌病(cardiomyopathy)、机械设备(mechanical equipment)、系统管理(system management)、全过程(whole process)、肺气肿(emphysema)、主要任务(major task)、安全玻璃(safety glass)、发育不良、右心室肥厚(right ventricular hypertrophy)、致心律失常(proarrhythmic)
[单选题]During a recent OSPF election among three routers, RTA was elected the DR and RTB was elected the BDR, as seen in the graphic. Assume that RTA fails, and that RTB takes the place ofthe DR whi le RTC becomes the new BDR. What will happen when RTA comes back online?()
A. A new election will take place establishing an all new DR and BDR based on configured priority levels and MAC addresses.
B. RTA will take the place of DR immediately upon esta blishing its adjacencies.
C. RTA will take the place of DR only if RTB fails.
D. RTA will take the place of DR only if both RTB and RTC fail.