CIDR(Classless Inter-Domain Routing) 표기법
ITWeb/스크랩 2010. 9. 9. 19:15
|
CIDR표기법 |
허용 IP |
|
192.0.0.0/8 |
192.0.0.0 ~ 192.255.255.255 |
|
192.168.0.0/16 |
192.168.0.0 ~192.168.255.255 |
|
192.168.67.0/24 |
192.168.67.0 ~ 192.168.67.255 |
'0/n'은
IP주소에서 처음부터 n비트수 만큼이 네트워크 주소를 의미하고, 나머지 뒤의 비트들은 호스트 주소임을 의미합니다.
예를 들어
10.25.0.0/16 = 00001010 00011001 00000000 00000000
빨간색은 네트워크 주소, 파란색은 호스트 주소를 의미합니다.
|
IP/CIDR |
Δ to last IP addr |
Mask |
Hosts (*) |
Class |
Notes |
|
a.b.c.d/32 |
+0.0.0.0 |
255.255.255.255 |
1 |
1/256 C |
|
|
a.b.c.d/31 |
+0.0.0.1 |
255.255.255.254 |
2 |
1/128 C |
d = 0 ... (2n) ... 254 |
|
a.b.c.d/30 |
+0.0.0.3 |
255.255.255.252 |
4 |
1/64 C |
d = 0 ... (4n) ... 252 |
|
a.b.c.d/29 |
+0.0.0.7 |
255.255.255.248 |
8 |
1/32 C |
d = 0 ... (8n) ... 248 |
|
a.b.c.d/28 |
+0.0.0.15 |
255.255.255.240 |
16 |
1/16 C |
d = 0 ... (16n) ... 240 |
|
a.b.c.d/27 |
+0.0.0.31 |
255.255.255.224 |
32 |
1/8 C |
d = 0 ... (32n) ... 224 |
|
a.b.c.d/26 |
+0.0.0.63 |
255.255.255.192 |
64 |
1/4 C |
d = 0, 64, 128, 192 |
|
a.b.c.d/25 |
+0.0.0.127 |
255.255.255.128 |
128 |
1/2 C |
d = 0, 128 |
|
a.b.c.0/24 |
+0.0.0.255 |
255.255.255.000 |
256 |
1 C |
|
|
a.b.c.0/23 |
+0.0.1.255 |
255.255.254.000 |
512 |
2 C |
c = 0 ... (2n) ... 254 |
|
a.b.c.0/22 |
+0.0.3.255 |
255.255.252.000 |
1,024 |
4 C |
c = 0 ... (4n) ... 252 |
|
a.b.c.0/21 |
+0.0.7.255 |
255.255.248.000 |
2,048 |
8 C |
c = 0 ... (8n) ... 248 |
|
a.b.c.0/20 |
+0.0.15.255 |
255.255.240.000 |
4,096 |
16 C |
c = 0 ... (16n) ... 240 |
|
a.b.c.0/19 |
+0.0.31.255 |
255.255.224.000 |
8,192 |
32 C |
c = 0 ... (32n) ... 224 |
|
a.b.c.0/18 |
+0.0.63.255 |
255.255.192.000 |
16,384 |
64 C |
c = 0, 64, 128, 192 |
|
a.b.c.0/17 |
+0.0.127.255 |
255.255.128.000 |
32,768 |
128 C |
c = 0, 128 |
|
a.b.0.0/16 |
+0.0.255.255 |
255.255.000.000 |
65,536 |
256 C = 1 B |
|
|
a.b.0.0/15 |
+0.1.255.255 |
255.254.000.000 |
131,072 |
2 B |
b = 0 ... (2n) ... 254 |
|
a.b.0.0/14 |
+0.3.255.255 |
255.252.000.000 |
262,144 |
4 B |
b = 0 ... (4n) ... 252 |
|
a.b.0.0/13 |
+0.7.255.255 |
255.248.000.000 |
524,288 |
8 B |
b = 0 ... (8n) ... 248 |
|
a.b.0.0/12 |
+0.15.255.255 |
255.240.000.000 |
1,048,576 |
16 B |
b = 0 ... (16n) ... 240 |
|
a.b.0.0/11 |
+0.31.255.255 |
255.224.000.000 |
2,097,152 |
32 B |
b = 0 ... (32n) ... 224 |
|
a.b.0.0/10 |
+0.63.255.255 |
255.192.000.000 |
4,194,304 |
64 B |
b = 0, 64, 128, 192 |
|
a.b.0.0/9 |
+0.127.255.255 |
255.128.000.000 |
8,388,608 |
128 B |
b = 0, 128 |
|
a.0.0.0/8 |
+0.255.255.255 |
255.000.000.000 |
16,777,216 |
256 B = 1 A |
|
|
a.0.0.0/7 |
+1.255.255.255 |
254.000.000.000 |
33,554,432 |
2 A |
a = 0 ... (2n) ... 254 |
|
a.0.0.0/6 |
+3.255.255.255 |
252.000.000.000 |
67,108,864 |
4 A |
a = 0 ... (4n) ... 252 |
|
a.0.0.0/5 |
+7.255.255.255 |
248.000.000.000 |
134,217,728 |
8 A |
a = 0 ... (8n) ... 248 |
|
a.0.0.0/4 |
+15.255.255.255 |
240.000.000.000 |
268,435,456 |
16 A |
a = 0 ... (16n) ... 240 |
|
a.0.0.0/3 |
+31.255.255.255 |
224.000.000.000 |
536,870,912 |
32 A |
a = 0 ... (32n) ... 224 |
|
a.0.0.0/2 |
+63.255.255.255 |
192.000.000.000 |
1,073,741,824 |
64 A |
a = 0, 64, 128, 192 |
|
a.0.0.0/1 |
+127.255.255.255 |
128.000.000.000 |
2,147,483,648 |
128 A |
a = 0, 128 |
|
0.0.0.0/0 |
+255.255.255.255 |
000.000.000.000 |
4,294,967,296 |
256 A |
|