1 TCP UDP区别 优缺点

2 黑盒白盒测试优缺点

3 划分子网

4 为什么设计不出来100 可靠的协议

5 浮点数由那两部分组成

6 数据库的学生选课情况 学生表 课程表 选课表 相关的一个查询-1 TCP UDP black box white box testing different advantages and disadvantages of the advantages and disadvantages 2 3 4 subnet out why the design is not 100　reliable protocol 5 the two parts of floating-point number 6 by the student elective cases database curriculum course selection list of students associated table a query