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Hitunglah Subnetting NETWORK ADDRESS 192.168.1.0/30?

Subnetting seperti apa yang terjadi dengan sebuah NETWORK ADDRESS 192.168.1.0/30? Analisa: 192.168.1.0 berarti kelas C dengan Subnetmask /30 berarti :

11111111.11111111.11111111.11111100  (255.255.255.248).

Perhitungan : Pertanyaan akan berpusat di 4 hal yaitu :

  1. Jumlah subnet
  2. Jumlah Host per Subnet
  3. Blok Subnet
  4. Alamat Host dan Broadcast yang Valid.

Selesaikan dengan urutan seperti itu :

  1. Jumlah Subnet = 2x , dimana x adalah banyaknya binary 1 pada octet terkhir subnetmask (2 oktet terakhir untuk kelas B, dan 3 oktet terakhir untuk kelas A). Jadi jumlah subnet adalah 26 = 64 subnet.
  2. Jumlah Host per Subnet = 2y -2 ,dimana y adalah kebalikan dari x yaitu banyaknya binary 0 pada octet terakhir subnet. Jadi jumlah host per subnet adalah 22 – 2 = 2 host.
  3. Blok Subnet = 256 – 252 (nilai octet terakhir subnetmask) = 4. Subnet berikutnya adalah 0+4= 4, 4+4=8, 8+4=12, 12+4=16, 16+4=20, 20+4=24, ….. 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100 ,104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252 . Jadi blok subnet lengkapnya adalah 0, 4, 8, 12, 16, 20, 24, 28, 32 ,36 , 40, 44, 48, 52 ,56 , 60, 64, 68, 72, 76, 80, 84, 88,92, 96, 100, 104,108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176 ,180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252.
  4. Bagaimana dengan alamat host dan broadcast yang valid ? Buatlah table untuk lebih jelas! Sebagai catatan, host pertama adalah 1 angka setelah subnet, dan broadcast adalah 1 angka sebelum subnet berikutnya.
Subnet / Network Address Host Pertama – Host Terakhir Broadcast Address:
192.168.1.0 192.168.1.1 – 192.168.1.2 192.168.1.3
192.168.1.4 192.168.1.5 – 192.168.1.6 192.168.1.7
192.168.1.8 192.168.1.9 – 192.168.1.10 192.168.1.11
192.168.1.12 192.168.1.13 – 192.168.1.14 192.168.1.15
192.168.1.16 192.168.1.17 – 192.168.1.18 192.168.1.19
192.168.1.20 192.168.1.21 – 192.168.1.22 192.168.1.23
192.168.1.24 192.168.1.25 – 192.168.1.26 192.168.1.27
192.168.1.28 192.168.1.29 – 192.168.1.30 192.168.1.31
192.168.1.32 192.168.1.33 – 192.168.1.34 192.168.1.35
192.168.1.36 192.168.1.37 – 192.168.1.38 192.168.1.39
192.168.1.40 192.168.1.41 – 192.168.1.42 192.168.1.43
192.168.1.44 192.168.1.45 – 192.168.1.46 192.168.1.47
192.168.1.48 192.168.1.49 – 192.168.1.50 192.168.1.51
192.168.1.52 192.168.1.53 – 192.168.1.54 192.168.1.55
192.168.1.56 192.168.1.57 – 192.168.1.58 192.168.1.59
192.168.1.60 192.168.1.61 – 192.168.1.62 192.168.1.63
192.168.1.64 192.168.1.65 – 192.168.1.66 192.168.1.67
192.168.1.68 192.168.1.69 – 192.168.1.70 192.168.1.71
192.168.1.72 192.168.1.73 – 192.168.1.74 192.168.1.75
192.168.1.76 192.168.1.77 – 192.168.1.78 192.168.1.79
192.168.1.80 192.168.1.81 – 192.168.1.82 192.168.1.83
192.168.1.84 192.168.1.85 – 192.168.1.86 192.168.1.87
192.168.1.88 192.168.1.89 – 192.168.1.90 192.168.1.91
192.168.1.92 192.168.1.93 – 192.168.1.94 192.168.1.95
192.168.1.96 192.168.1.97 – 192.168.1.98 192.168.1.99
192.168.1.100 192.168.1.101 – 192.168.1.102 192.168.1.103
192.168.1.104 192.168.1.105 – 192.168.1.106 192.168.1.107
192.168.1.108 192.168.1.109 – 192.168.1.110 192.168.1.111
192.168.1.112 192.168.1.113 – 192.168.1.114 192.168.1.115
192.168.1.116 192.168.1.117 – 192.168.1.118 192.168.1.119
192.168.1.120 192.168.1.121 – 192.168.1.122 192.168.1.123
192.168.1.124 192.168.1.125 – 192.168.1.126 192.168.1.127
192.168.1.128 192.168.1.129 – 192.168.1.130 192.168.1.131
192.168.1.132 192.168.1.133 – 192.168.1.134 192.168.1.135
192.168.1.136 192.168.1.137 – 192.168.1.138 192.168.1.139
192.168.1.140 192.168.1.141 – 192.168.1.142 192.168.1.143
192.168.1.144 192.168.1.145 – 192.168.1.146 192.168.1.147
192.168.1.148 192.168.1.149 – 192.168.1.150 192.168.1.151
192.168.1.152 192.168.1.153 – 192.168.1.154 192.168.1.155
192.168.1.156 192.168.1.157 – 192.168.1.158 192.168.1.159
192.168.1.160 192.168.1.161 – 192.168.1.162 192.168.1.163
192.168.1.164 192.168.1.165 – 192.168.1.166 192.168.1.167
192.168.1.168 192.168.1.169 – 192.168.1.170 192.168.1.171
192.168.1.172 192.168.1.173 – 192.168.1.174 192.168.1.175
192.168.1.176 192.168.1.177 – 192.168.1.178 192.168.1.179
192.168.1.180 192.168.1.181 – 192.168.1.182 192.168.1.183
192.168.1.184 192.168.1.185 – 192.168.1.186 192.168.1.187
192.168.1.188 192.168.1.189 – 192.168.1.190 192.168.1.191
192.168.1.192 192.168.1.193 – 192.168.1.194 192.168.1.195
192.168.1.196 192.168.1.197 – 192.168.1.198 192.168.1.199
192.168.1.200 192.168.1.201 – 192.168.1.202 192.168.1.203
192.168.1.204 192.168.1.205 – 192.168.1.206 192.168.1.207
192.168.1.208 192.168.1.209 – 192.168.1.210 192.168.1.211
192.168.1.212 192.168.1.213 – 192.168.1.214 192.168.1.215
192.168.1.216 192.168.1.217 – 192.168.1.218 192.168.1.219
192.168.1.220 192.168.1.221 – 192.168.1.222 192.168.1.223
192.168.1.224 192.168.1.225 – 192.168.1.226 192.168.1.227
192.168.1.228 192.168.1.229 – 192.168.1.230 192.168.1.231
192.168.1.232 192.168.1.233 – 192.168.1.234 192.168.1.235
192.168.1.236 192.168.1.237 – 192.168.1.238 192.168.1.239
192.168.1.240 192.168.1.241 – 192.168.1.242 192.168.1.243
192.168.1.244 192.168.1.245 – 192.168.1.246 192.168.1.247
192.168.1.248 192.168.1.249 – 192.168.1.250 192.168.1.251
192.168.1.252 192.168.1.253 – 192.168.1.254 192.168.1.255

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