SUBNETING
12.13.00
By
Farid Cyberphreaking S,Kom
Subneting
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Tabel Subneting
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No
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CIDR
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Alamat Network
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Alamat Host yang valid
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Broadcast
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1
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/8
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10.0.0.0
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10.0.0.1 sampai 10.255.255.254
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10.255.255.255
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2
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/9
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10.0.0.0
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10.0.0.1 sampai 10.127.255.254
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10.127.255.255
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10.128.0.0
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10.128.0.1 sampai 10.128.255.254
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10.128.255.255
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3
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/10
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10.0.0.0
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10.0.0.1 sampai 10.63.255.254
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10.63.255.255
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10.64.0.0
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10.64.0.1 sampai 10.127.255.254
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10.127.255.255
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10.128.0.0
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10.128.0.1 sampai 10.191.255.254
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10.191.255.255
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10.192.0.0
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10.192.0.1 sampai 10.255.255.254
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10.255.255.255
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4
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/11
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10.0.0.0
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10.0.0.1 sampai 10.31.255.254
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10.31.255.255
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10.32.0.0
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10.32.0.1 sampai 10.63.255.254
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10.63.255.255
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10.64.0.0
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10.64.0.1 sampai 10.95.255.254
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10.95.255.255
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10.96.0.0
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10.96.0.1 sampai 10.127.255.254
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10.127.255.255
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10.128.0.0
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10.128.0.1 sampai 10.159.255.254
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10.159.255.255
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10.160.0.0
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10.160.0.1 sampai 10.191.255.254
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10.191.255.255
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10.192.0.0
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10.192.0.1 sampai 10.223.255.254
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10.223.255.255
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10.224.0.0
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10.224.0.1 sampai 10.255.255.254
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10.255.255.255,00
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/12
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10.0.0.0
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10.0.0.1 sampai 10.15.255.254
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10.15.255.255.255
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10.16.0.0
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10.16.0.1 sampai 10.31.255.254
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10.31.255.255
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10.32.0.0
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10.32.0.1 sampai 10.32.255.254
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10.32.255.255
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SAMPAI
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10.240.0.0
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10.240.0.1 sampai 10.255.255.254
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10.255.255.255
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5
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/13
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10.0.0.0
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10.0.0.1 sampai 10.7.255.254
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10.7.255.255
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10.8.0.0
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10.8.0.1 sampai 10.15.255.254
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10.15.255.255
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SAMPAI
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10.248.0.0
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10.248.0.1 SAMPAI 10.255.255.254
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10.255.255.255
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6
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/14
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10.0.0.0
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10.0.0.1 Sampai 10.3.255.254
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10.3.255.255
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10.4.0.0
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10.4.0.1 Sampai 10.7.255.254
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10.7.255.255
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SAMPAI
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10.252.0.0
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10.252.0.1 Sampai 10.255.255.254
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10.255.255.255
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7
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/15
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10.0.0.0
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10.0.0.1 sampai 10.1.255.254
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10.1.255.255
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10.2.0.0
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10.2.0.0 Sampai 10.3.255.254
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10.3.255.255
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SAMPAI
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10.254.0.0
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10.254.0.1 Sampai 10.255.255.254
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10.255.255.255
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8
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/16
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10.0.0.0
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10.0.0.1 sampai 10.0.255.254
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10.0.255.255
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9
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/17
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10.0.0.0
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10.0.0.1 sampai 10.0.127.254
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10.0.255.255
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10.0.128.0
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10.0.128.1 Sampai 10.0.255.254
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10.0.255.255
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10
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/18
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10.0.0.0
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10.0.0.1 Sampai 10.0.63.254
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10.0.63.255
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10.0.64.0
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10.0.64.1 Sampai 10.0.127.254
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10.0.127.255
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10.0.128.0
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10.0.128.1 sampai 10.0.191.255
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10.0.192.255
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10.0.192.0
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10.0.192.1 Sampai 10.0.255.254
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10.0.255.255
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11
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/19
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10.0.0.0
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10.0.0.1 Sampai 10.0.31.254
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10.0.31.255
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10.0.32.0
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10.0.32.1 Sampai 10.0.63.254
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10.0.63.255
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Sampai
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10.0.224.0
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10.0.224.1 Sampai 10.0.255.254
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10.0.255.255
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12
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/20
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10.0.0.0
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10.0.0.1 Sampai 10.0.15.255
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10.0.15.255
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10.0.16.0
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10.0.16.1 Sampai 10.0.31.254
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10.0.31.255
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SAMPAI
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10.0.240.0
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10.0.240.1 Sampai 10.0.255.254
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10.0.255.255
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13
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/21
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10.0.0.0
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10.0.0.1 Sampai 10.0.7.254
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10.0.7.255
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10.0.8.0
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10.0.8.1 Sampai 10.0.15.254
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10.0.15.255
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SAMPAI
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10.0.248.0
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10.0.248.1 Sampai 10.0.255.254
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10.0.255.255
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14
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/22
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10.0.0.0
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10.0.0.1 Sampai 10.0.3.254
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10.0.3.255
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10.0.4.0
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10.0.4.1 Sampai 10.0.7.254
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10.0.7.255
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SAMPAI
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10.0.252.0
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10.0.252.1 Sampai 10.0.255.254
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10.0.255.255
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15
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/23
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10.0.0.0
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10.0.0.1 Sampai 10.0.1.254
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10.0.1.255
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10.0.2.0
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10.0.2.1 Sampai 10.0.3.254
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10.0.3.255
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SAMPAI
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10.0.254.0
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10.0.254.1 Sampai 10.0.255.254
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10.0.255.255
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15
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/24
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10.0.0.0
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10.0.0.1 sampai 10.0.0.254
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10.0.0.255
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16
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/25
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10.0.0.0
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10.0.0.1 sampai 10.0.0.126
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10.0.0.127
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10.0.0.128
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10.0.0.128 Sampai 10.0.0.254
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10.0.0.255
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17
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/26
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10.0.0.0
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10.0.0.1 Sampai 10.0.0.62
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10.0.0.63
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10.0.0.64
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10.0.0.65 Sampai 10.0.0.126
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10.0.3.127
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SAMPAI
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10.0.0.192
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10.0.0.193 Sampai 10.0.0.254
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10.0.0.255
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18
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/27
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10.0.0.0
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10.0.0.1 Sampai 10.0.0.30
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10.0.0.31
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10.0.0.32
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10.0.0.33 Sampai 10.0.0.62
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10.0.0.63
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SAMPAI
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10.0.0.224
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10.0.0.225 Sampai 10.0.0.254
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10.0.0.255
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19
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/28
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10.0.0.0
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10.0.0.1 Sampai 10.0.0.14
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10.0.0.15
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10.0.0.16
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10.0.0.17 Sampai 10.0.0.30
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10.0.0.31
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SAMPAI
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10.0.0.240
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10.0.0.241 Sampai 10.0.0.254
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10.0.0.255
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20
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/29
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10.0.0.0
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10.0.0.1 Sampai 10.0.0.6
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10.0.0.7
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10.0.0.8
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10.0.0.9 Sampai 10.0.0.14
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10.0.0.15
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SAMPAI
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10.0.0.248
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10.0.0.249 Sampai 10.0.0.254
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10.0.0.255
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21
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/30
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10.0.0.0
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10.0.0.1 Sampai 10.0.0.2
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10.0.0.3
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10.0.0.4
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10.0.0.5 Sampai 10.0.0.6
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10.0.0.7
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SAMPAI
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10.0.0.252
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10.0.0.253 Sampai 10.0.0.254
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10.0.0.255
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Cara Penghitungan Subneting dengan
Menggunakan CIDR
Subneting adalah suatu cara yang
digunakan untuk menghitung alamat IP. Sedangkan CIDR (Classless Inter Domain
Root) adalah Sebuah cara yang digunakan untuk menelompokkan subnet menjadi
kelas A, B, atau C selain itu CIDR juga digunakan untuk menghitung subnet mask.
Dalam menghitung Subnet kita perlu
menetahui berapa jumlah subnet (network), host/subnet, dan block subnetnya agar
kita mudah dalam pengelompokan IP nya.
Cara menghitung subnet mask dengan
menggunakan CIDR
Dengan berpedoman pada 8 deret angka
yaitu 128 64 32 16 8 4 2 1 yang setiap angka tersebut mewakili bilangan biner.
Dalam pembacaan bilangan binernya, angka 1 berarti angka tersebut hidup kalau
angka 0 berarti angka tersebut mati.
Kelas A.
Pada kelas A penghitungan binary
dimulai dari octet ke 2. Contoh : 11111111.11000000.00000000.00000000 dapat
dibaca 255.192.0.0
Kelas B.
Pada kelas B penghitungan binary
dimulai dari octet ke 3. Contoh : 11111111.11111111.10100000.00000000 dapat
dibaca : 255.255.160.0
Kelas C.
Pada kelas B penghitungan binary
dimulai dari octet ke 4 (terakhir). Contoh :
11111111.11111111.11111111.10000001 dapat dibaca : 255.255.255.129
Cara Menghitung Subnet
Subnet = 2x (Dimana x
merupakan banyaknya binary 1 pada subnet mask)
Cara Menghitung host/subnet
Host/subnet = 2y – 2
(dimana y adalah banyaknya binary 0 pada subnet mask)
Cara Penghitungan block subnet
Block subnet = 256 – (nilai binary 1
pada subnet mask)
Contoh!
192.168.3.0/26 Hitunglah
subnetingnya!
Maka :
Subnetmask =
11111111.11111111.11111111.11000000 = 255.255.255.192
X = 2
Y = 6
Subnet = 2x =22
= 4
Host/subnet = 2y – 2 = 26
– 2 = 64 -2 = 62
Block Subnet = 256 – 192 = 64
Tabel Subnetnya
Network ID
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192.168.3.0
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192.168.3.64
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192.168.3.128
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192.168.3.192
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Host Pertama
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192.168.3.1
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192.168.3.65
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192.168.3.129
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192.168.3.193
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Host Terakhir
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192.168.3.62
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192.168.3.126
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192.168.3.190
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192.168.3.254
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Broadcast Address
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192.168.3.63
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192.168.3.127
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192.168.3.191
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192.168.3.255
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