以IP地址192.168.145.177/27为例，该地址所处网段中实际可用地址范围为：( D )
A.192.168.145.129―――192.168.145.190
B.192.168.145.161―――192.168.145.175
C.192.168.145.160―――192.168.145.191
D.192.168.145.161―――192.168.145.190
正确答案是D