/ 24 = 255 个 IP = $ *** / IP / mo
/ 23 = 2 x / 24 = $ *** / IP / mo
/ 22 = 4 x / 24 = $ *** / IP / mo
/ 21 = 8 x / 24 = $ *** / IP / mo
/ 20 = 16 x / 24 = $ *** / IP / mo
/ 19 = 32 x / 24 = $ *** / IP / mo
/ 18 = 64 x / 24 = $ *** / IP / mo
请问 / 18 = 64 x / 24 这些都是什么意思啊