prifix 값과 Subnet mask

prifix	Subnet mask	Wildcard mask	IP수량
32	255.255.255.255	0.0.0.0	1
31	255.255.255.254	0.0.0.1	2
30	255.255.255.252	0.0.0.3	4
29	255.255.255.248	0.0.0.7	8
28	255.255.255.240	0.0.0.15	16
27	255.255.255.224	0.0.0.31	32
26	255.255.255.192	0.0.0.63	64
25	255.255.255.128	0.0.0.127	128
24	255.255.255.0	0.0.0.255	256
23	255.255.254.0	0.0.1.255	512
22	255.255.252.0	0.0.3.255	1024