From theory to practice,this paper thoroughly discusses three kinds of technology about remote OS detection with the Perl program,summarizes their advantages and disadvantages,and generalizes two of the methods,expressed in sketch.

• 文章结合实践,从perl编程角度深入讨论了远程探测操作系统的3种方法,并且归纳总结了它们各自的优缺点,系统地给出了其中2种方法的工作示意图。