2021儿科护理专业实践能力真题模拟04-11

1、How long will a port remain in the listening state by default？（）（单选题）

A. Depends on the number of switches in the spanning tree domain

B. 50 seconds

C. 15 seconds

D. Until the root directs it to start forwarding

E. 20 seconds

F. Depends on the pott speed

试题答案：C

2、Your company has two primary divisions： Products and Services. The Products division is on network 150.10.640/21. The Services division is on network 150.10.72.0/21. You want to summarize both networks into one routing statement. Which IP address and subnet mask combination would most efficiently accomplish this？（）（单选题）

A.  150.10.64.0/21

B.  150.10.64.0/22

C.  150.10.64.0/20

D.  150.10.0.0./16

试题答案：C

3、With respect to a computer file system, an access control list (ACL) is a list of permissions attached to an object. Which of the following makes forwarding decisions in hardware?（）（单选题）

A. IETF

B. PFC

C. TCAM

D. ASIC

试题答案：B

4、哪项诊断可能性最大？（　　）（单选题）

A. 呼吸道合胞病毒肺炎

B. 金黄色葡萄球菌肺炎

C. 肺炎球菌肺炎

D. 肺炎支原体肺炎

E. 腺病毒肺炎

试题答案：E

5、Given the multicast IP address of 224.193.5.10， what would the corresponding multicast MACaddress be？（）（单选题）

A. 00-00-0c-c0-05-0a

B. 00-00-0c-cl-05-0a

C. 01-00-5e-00-00-0c

D. 01-00-5e-41-05-0a

E. 00-00-0c-01-00-5e

F. 01-00-5e-cl-05-0a

试题答案：D