2021儿科护理专业实践能力真题模拟03-22

1、Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a longer AS_Path Length, bigger MED, bigger Weight, and smaller Loca l PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）（单选题）

A. Route 1 is the best route.

B. Route 2 is the best route.

C. The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers.

D. Neither route is considered best.

试题答案：A

2、查看OSPF路由器的邻居列表，应使用下列哪个命令？（）（单选题）

A. show ip ospf neighbor

B. show ip ospf interface

C. show ip ospf

D. show ip route

试题答案：A

3、一般1个月内的新生儿，家庭访视的次数是（　　）。（单选题）

A. 4次

B. 5次

C. 6次

D. 7次

E. 8次

试题答案：A

4、 Refer to the exhibit. What is the effect on the trust boundary of configuring the command mls qos trust  cos on the switch port that is connected to the IP phone？（） （单选题）

A.  Effectively the trust boundary has been moved to the IP phone.

B.  The host is now establishing the CoS value and has effectively become the trust boundary. 

C.  The switch is rewriting packets it receives from the IP phone and determining the CoS value.  

D.  The switch will no longer tag incoming voice packets and will trust the distribution layer switch to set theCoS

E.  RTP will be used to negotiate a CoS value based upon bandwidth utilization on the link.

试题答案：A

5、Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）（多选题）

A.  Packets can arrive out of order.

B.  Packets must take the same path to the destination.

C.  Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.

D.  Packets can experience varying delays across the network.

E.  Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.

试题答案：A,D