Classless Inter-Domain Routing 사이더 (네트워킹) - 위키백과, 우리 모두의 백과사전 http://www.subnet-calculator.com/ IPv4 CIDR Address format Difference to last address Mask Addresses Relative to class A, B, C Restrictions on a, b, c and d (0..255 unless noted) Typical use Decimal 2n a.b.c.d / 32 +0.0.0.0 255.255.255.255 1 20 1/ 256 C Host route a.b.c.d / 31 +0.0.0.1 255.255.255.254 2 21 1/ 128 C d = 0 ... (2n) ... ..
