[Networks] IP Prefix-list

예)

192.168.1.0/24 = IP 대역 192.168.1.1 ~ 192.168.1.254 = Subnet Mask 255.255.255.0

192.168.1.0/25 = IP 대역 192.168.1.1 ~ 192.168.1.126 = Subnet Mask 255.255.255.128

192.168.1.128/25 = IP 대역 192.168.1.129 ~ 192.168.1.254 = Subnet Mask 255.255.255.128

192.168.0.0/20 = IP 대역 192.168.0.1 ~ 192.168.15.254 = Subnet Mask 255.255.240.0

 

 

서브넷 당 IP 사용 개수

0	4,294,967,296
1	2,147,483,648	9	8,388,608	17	32,768	25	128
2	1,073,741,824	10	4,194,304	18	16,384	26	64
3	536,870,912	11	2,097,152	19	8,192	27	32
4	268,435,456	12	1,048,576	20	4,096	28	16
5	134,217,728	13	524,288	21	2,048	29	8
6	67,108,864	14	262,144	22	1,024	30	4
7	33,554,432	15	131,072	23	512	31	2
8	16,777,216	16	65,536	24	256	32	1