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°£´ÜÇÑ ³×Æ®¿öÅ© °è»ê¹æ¹ýÀÔ´Ï´Ù.
(¿¹½ÃÀÇ 10 Áø¼ö´Â IPv4 ¿¡¼ °¢ 8 ºñÆ® Çϳª¸¦ ÀǹÌÇÔ)
1. ¼ºê³ÝÀÌ 224 À̶ó¸é »ç¿ë°¡´ÉÇÑ È£½ºÆ® (³×Æ®¿öÅ©)´Â ?
*°è»ê¹æ¹ý)
256 - 224 = 32 °³
2. À§¿¡¼ IPv4 ¸¶Áö¸· 8 ºñÆ®°¡ 118 À̶ó¸é ³×Æ®¿öÅ© ÁÖ¼Ò¿Í
ºê·Îµåij½ºÆ® ÁÖ¼Ò´Â ?
*°è»ê¹æ¹ý)
32ÀÇ ¹è¼öµé : 0, 32, 64, 96, 128, 160, 192, 224, 256
Áß¿¡¼ 118 º¸´Ù ÀÛÀº ¹è¼öÁß¿¡¼ Á¦ÀÏ Å« ³à¼®..
- ³×Æ®¿öÅ©ÁÖ¼Ò : x.x.x.96
- ºê·Îµåij½ºÆ®ÁÖ¼Ò : x.x.x.127
3. global ³×Æ®¿öÅ©¿¡¼, ³×Æ®¿öÅ©ÁÖ¼Ò°¡ x.248.0.0 ÀÌ°í,
³Ý¸Å½ºÅ©°¡ 255.248.0.0 ÀÌ¸é ºê·Îµå ij½ºÆ® ÁÖ¼Ò(¸¶Áö¸·ÁÖ¼Ò)´Â?
*°è»ê¹æ¹ý)
³Ý¸Å½ºÅ© °¢ 8ºñÆ®¸¦ Çϳª¾¿ °è»ê :
255 - 255 = 0
255 - 248 = 7
255 - 0 = 255
255 - 0 = 255
³ª¿Â°á°ú°ªÀ» °¢ 8 ºñÆ®¿¡ ´õÇϸé
x + 0 = x
248 + 7 = 255
0 + 255 = 255
0 + 255 = 255
µû¶ó¼,
- ºê·Îµåij½ºÆ®ÁÖ¼Ò : x.255.255.255
*°è»ê½Ä = ³×Æ®¿öÅ©ÁÖ¼Ò + (255.255.255.255 - ¼ºê³Ý¸Å½ºÅ©)
4. ÇϳªÀÇ ¼ºê³ÝÀÌ 8°³ÀÇ È£½ºÆ®°¡ µÇ°Ô ÇÏ·Á¸é ¼ºê³Ý¸Å½ºÅ©´Â ?
*°è»ê¹æ¹ý)
1¹ø°ú °°Àº ¹®Á¦·Î
256 - 8 = 248
µû¶ó¼ C Ŭ·¡½º¶ó¸é,
- x.x.x.248
5. ½ÃÀÛÁÖ¼Ò¿Í ¸¶Áö¸·ÁÖ¼Ò¸¦ ¾Ë°í ÀÖ´Ù¸é ³Ý¸Å½ºÅ©´Â?
*°è»ê¹æ¹ý)
256 - ( ¸¶Áö¸·ÁÖ¼Ò + 1 - ½ÃÀÛÁÖ¼Ò)
= ½ÃÀÛÁÖ¼Ò + (256 - ¸¶Áö¸·ÁÖ¼Ò - 1)
= ½ÃÀÛÁÖ¼Ò + (255 - ¸¶Áö¸·ÁÖ¼Ò)
or
/32 - bit( ¸¶Áö¸·ÁÖ¼Ò + 1 - ½ÃÀÛÁÖ¼Ò)
6. CIDR Ç¥Çö
/32 : 255.255.255.255 : 11111111.11111111.11111111.11111111 32-32 = 0 => 2^0 =
1 hosts => 256- 1 = x.255
/24 : 255.255.255.0 : 11111111.11111111.11111111.00000000 32-24 = 8 => 2^8 =
256 hosts => 256-256 = x.0
/16 : 255.255.0.0 : 11111111.11111111.00000000.00000000 32-16 = 16 => »ý·«
/8 : 255.0.0.0 : 11111111.00000000.00000000.00000000 32- 8 = 24 => »ý·«
---
/32 : 255.255.255.255 : 11111111.11111111.11111111.11111111 32-32 = 0 => 2^0 =
1 hosts => 256- 1 = x.255
/31 : 255.255.255.254 : 11111111.11111111.11111111.11111110 32-31 = 1 => 2^1 =
2 hosts => 256- 2 = x.254
/30 : 255.255.255.252 : 11111111.11111111.11111111.11111100 32-30 = 2 => 2^2 =
4 hosts => 256- 4 = x.252
/29 : 255.255.255.248 : 11111111.11111111.11111111.11111000 32-29 = 3 => 2^3 =
8 hosts => 256- 8 = x.248
/28 : 255.255.255.240 : 11111111.11111111.11111111.11110000 32-28 = 4 => 2^4 =
16 hosts => 256- 16 = x.240
/27 : 255.255.255.224 : 11111111.11111111.11111111.11100000 32-27 = 5 => 2^5 =
32 hosts => 256- 32 = x.224
/26 : 255.255.255.192 : 11111111.11111111.11111111.11000000 32-26 = 6 => 2^6 =
64 hosts => 256- 64 = x.192
/25 : 255.255.255.128 : 11111111.11111111.11111111.10000000 32-25 = 7 => 2^7 =
128 hosts => 256-128 = x.128
/24 : 255.255.255.0 : 11111111.11111111.11111111.00000000 32-24 = 8 => 2^8 =
256 hosts => 256-256 = x.0
EOF
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