넷마스크 비트

subnet mask (서브넷 마스크) 비트 별 정리

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bit  netmask Cisco mask hosts usable hosts Class /4 240.0.0.0 15.255.255.255 268435456 268435454  /5 248.0.0.0 7.255.255.255 134217728 134217726  /6 252.0.0.0 3.255.255.255  67108864 67108862  /7 254.0.0.0 1.255.255.255 33554432 33554430  /8 255.0.0.0 0.255.255.255 16777216 16777214  A Class  /9 255.128.0.0 0.127.255.255 8388608 8388606  /10 255.192.0.0 0.63.255.255 4194304 4194302  /11 255.224.0.0 0.31.255.255 2097152 2097150  /12 255.240.0.0 0.15.255.255 1048576 1048574 … Read more