题目
What is the purpose of the Spanning Tree Protocol (STP)?
A.To prevent routing loops
B.To create a default route
C.To provide multiple gateways for hosts
D.To maintain a loop-free Layer 2 network topology
E.To enhance the functions of SNMP
第7题
A.What to do?
B.How to do?
C.The result of work.
D.The purpose of work.
第8题
The main purpose of the second paragraph is to ______.
A.tell what is talent
B.explain that intelligent children are creative.
C.differentiate between creativity and intelligence.
D.show that creative children are usually intelligent.
第11题
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