如果发现网络的数据传输很慢，服务质量也达不到要求，应该首先检查哪一个协议层工作情况 （ ）。
- A.物理层
- B.会话层
- C.网络层
- D.传输层
正确答案及解析
正确答案
解析
网络故障排查应根据协议层次由下至上的原则进行检测。题目说明是性能方面的故障，不属于连通性的故障，所以检查网络层。
（这题出的不好有问题，可以跳过，物理层存在问题也可能会导致访问卡慢）
包含此试题的试卷
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