Routers R1 and R2 are configured for HSRP as shown below: Router R1: interface ethernet 0 ip address 20.6.2.1 255.255.255.0 standby 35 ip 20.6.2.21 standby 35 priority 100 interface ethernet 1 ip address 20.6.1.1.2 255.255.255.0 standby 34 ip 20.6.1.21 Router R2: interface ethernet 0 ip address 20.6.2.2 255.255.255.0 standby 35 ip 20.6.2.21 interface ethernet 1 ip address 20.6.1.1.1 255.255.255.0 standby 34 ip 20.6.1.21 standby 34 priority 100 You have configured the routers R1 & R2 with HSRP. While debugging router R2 you notice veryfrequent HSRP group state transitions. What is the most likely cause of this?()
A. physical layer issues
B. no spanning tree loops
C. use of non-default HSRP timers
D. failure to set the command standby 35 preempt
女孩,6岁,既往体健,突发腹痛11小时,腹痛呈持续性,逐渐加重。伴寒战、发热,体温达39℃。排稀便1次。查体:急性病容,精神萎靡,呼吸急促,腹胀,全腹有明显压痛及肌紧张,肠鸣音消失。腹腔穿刺抽出稀薄脓液,涂片检查找到球菌。血常规:白细胞19×10/L,中性粒细胞90%。此患儿诊断应考虑为()
A. 弥漫性腹膜炎,胆囊穿孔
B. 弥漫性腹膜炎,溃疡病穿孔
C. 弥漫性腹膜炎,阑尾穿孔
D. 原发性腹膜炎
E. 弥漫性腹膜炎,急性肠扭转肠坏死