Thenetworktechnicianis planningtousethe255.255.255.224subentmaskonthenetwork.whichthreevalidIPaddressescanthetechnicianuseforthehosts？（）

A.172.22.243.127
B.172.22.243.191
C.172.22.243.190
D.10.16.33.98
E.10.17.64.34
F.192.168.1.160

【参考答案】

C, D, E