(Lecture hall practice _DNS and IP query, understand and understand DNS service configuration, and IP query and IP vulnerability prevention.
3.2.6 Lecture practice _DNS and IP query_command 1.exe
3.2.6 Lecture practice_DNS and IP query_command 1 process.txt
3.2.6 Lecture Practice_Old Friends Positioning_Order 2.pdf
3.2.6 Lecture Practice_Old Friends Positioning_Command 2 Process.txt)