下圖中交換機為兩層交換機,主機HostA的IP地址、子網(wǎng)掩碼和網(wǎng)關設置正確的是()
A.IP 192.168.188.31;255.255.255.192;網(wǎng)關192.168.188.130
B.IP 192.168.188.30;255.255.255.0;網(wǎng)關172.16.1.1
C.IP 192.168.188.20;255.255.255.192;網(wǎng)關192.168.188.129
D.IP 192.168.188.143;255.255.255.192;網(wǎng)關192.168.188.129