單項選擇題滲透測試人員常用Nmap工具進行網(wǎng)絡連通性測試，參數(shù)-sP的工作原理為（）。

A.向目標主機發(fā)送UDP Echo Request數(shù)據(jù)包，等待對方回應UDP Echo Reply數(shù)據(jù)包
B.向目標主機發(fā)送ICMP Echo Request數(shù)據(jù)包，等待對方回應ICMP Echo Reply數(shù)據(jù)包
C.向目標主機發(fā)送UDP Echo Reply數(shù)據(jù)包，等待對方回應ICMP Echo Request數(shù)據(jù)包
D.向目標主機發(fā)送ICMP Echo Reply數(shù)據(jù)包，等待對方回應ICMP Echo Request數(shù)據(jù)包