서브넷마스크(subnetmask) 표

 

Bits	Hosts	Subnetmask	Class
/4	268435456	240.0.0.0
/5	134217728	248.0.0.0
/6	67108864	252.0.0.0
/7	33554432	254.0.0.0
/8	16777216	255.0.0.0	class A network
/9	8388608	255.128.0.0
/10	4194304	255.192.0.0
/11	2097152	255.224.0.0
/12	1048576	255.240.0.0
/13	524288	255.248.0.0
/14	262144	255.252.0.0
/15	131072	255.254.0.0
/16	65536	255.255.0.0	class B network
/17	32768	255.255.128.0
/18	16384	255.255.192.0
/19	8192	255.255.224.0
/20	4096	255.255.240.0
/21	2048	255.255.248.0
/22	1024	255.255.252.0
/23	512	255.255.254.0
/24	256	255.255.255.0	class C network
/25	128	255.255.255.128
/26	64	255.255.255.192
/27	32	255.255.255.224
/28	16	255.255.255.240
/29	8	255.255.255.248
/30	4	255.255.255.252
/31	.	.
/32	1	255.255.255.255