交换机收到完整的数据帧后,执行CRC校验,检查通过后才转发帧,这种转发模式称之为()

题型:单项选择题

问题:

交换机收到完整的数据帧后,执行CRC校验,检查通过后才转发帧,这种转发模式称之为()转发模式.

A.Cut-Through

B.Store-and-Forward

C.Fragment-free

D.Store-free

考点:华为认证考试华为认证数据通信工程师HCDA考试华为认证数据通信工程师HCDA考试题库
题型:单项选择题

阅读短文,选择正确答案。

      There is a new park near my house. It's Yiai Lake Park (遗爱湖公园). My family often go to the park.

There is a lake in the park. There are many trees and flowers in the park. There is a playground in the middle

of (中间) the park. There are some children over there. The park is beautiful. We like it very much.

1. ____________ is near my house. [ ]

A. A new park

B. A lake

C. A playground

2. There are ____________ and ____________ in the park. [ ]

A. many trees; flowers

B. many houses; lake

C. many lakes; children

3. There is a playground ____________ the park. [ ]

A. in the middle of

B.under

C. behind

4. There are ____________ on the playground.[ ]

A. many flowers

B. some trees

C. many children

5. We like ____________ very much.[ ]

A. Yiai Lake Park

B. Lake

C. children

题型:单项选择题

下列图片反映的共同历史主题是

[ ]

A.发展资本主义

B.反对专制统治

C.反抗外来侵略

D.救亡图存

题型:单项选择题

读图题:

(1)图中A地是________今________,为对全国进行有效统治,元朝采取了什么方式?

                                                                                                                                                            

(2)图中B地在唐朝时生活的民族是________,与唐朝是什么关系?

                                                                                                                                                            

(3)元朝在B地设立机构——宣政院辖地,该机构的设置有何意义?

                                                                                                                                                           

(4)2008年,藏独分子在拉萨打砸抢烧,给人民带来极大灾害。请你用自己的感情和知识奉劝那些藏独分子认清现实。你会对他们说:

                                                                                                                                                            

                                                                                                                                                            

题型:单项选择题

大黄根茎断面有()

A.星点 

B.罗盘纹 

C.黄白色小点排列数轮同心环 

D.云锦花纹 

E.朱砂点

题型:单项选择题

对PSS试验机组运行工况的要求有功功率应大于()额定有功功率,无功功率应小于()额定无功功率。

A.70%、20%

B.80%、20%

C.70%、10%

D.80%、10%

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