Ulasan :
Misal : 192.168.1.0/27
·
Ini adalah kelas C, karena 3 digit pertama
berada pada 192-223
Kelas A = 0 - 127
Kelas B = 128 - 191
Kelas C = 192 - 223
·
/27 = 11111111.11111111.11111111.11100000 (hitung angka 1 nya = 8+8+8+3=27)
= (27+26+25+24+23+22+21+20)
. (27+26+25+24+23+22+21+20)
. (27+26+25+24+23+22+21+20)
. (27+26+25)
= 255 . 255 . 255 . 224
Sehingga, Subnet Mask =
255.255.255.224
·
Jumlah Subnet :
23 = 8 (Hitung angka 1 pada 8 biner terakhir.)
·
Jumlah Host/Subnet : 25 – 2 = 32 – 2 = 30 (Hitung angka 0 pada 8 biner
terakhir)
Dikurangi 2 karena 1 di awal akan menjadi penanda
jaringan/Subnet dan 1 di akhir u/Broadcast
·
Blok Subnet : 25 = 32. Maka, Blok
Subnet berada pada kelipatan 32. (0,32,64,96,128,160,192,224)
Subnet
|
192.168.1.0
|
192.168.1.32
|
…
|
192.168.1.224
|
….
|
Host Awal
|
192.168.1.1
|
192.168.1.33
|
192.168.1.225
|
||
Host Akhir
|
192.168.1.30
|
192.168.1.62
|
192.168.1.254
|
||
Broadcast
|
192.168.1.31
|
192.168.1.63
|
192.168.1.255
|
nb) Setelah 192.168.1.224, subnet selanjutnya = 192.168.2.0
Contoh Subnetting Kelas A
1 50.0.0.0/8
·
11111111.00000000.00000000.00000000
·
Subnet Mask :
255.0.0.0
·
Jumlah Subnet :
20 = 1
·
Jumlah Host/Subnet : 224 – 2 = 16.777.216-2=16.777.214
·
Blok Subnet :
224/256/256 = 16.777.216/256/256 = 256
Subnet
|
50.0.0.0
|
50.1.0.0
|
50.2.0.0
|
….
|
Host Awal
|
50.0.0.1
|
50.1.0.1
|
50.2.0.1
|
|
Host Akhir
|
50.0.255.254
|
50.1.255.254
|
50.2.255.254
|
|
Broadcast
|
50.0.255.255
|
50.1.255.255
|
50.2.255.255
|
2 100.0.0.0/10
·
11111111.11000000.00000000.00000000
·
Subnet Mask :
255.192.0.0
·
Jumlah Subnet :
22 = 4
·
Jumlah Host/Subnet : 222 – 2 = 4.194.304 – 2 = 4.194.302
·
Blok Subnet :
222/256/256=64 (0,64,128, 192)
Subnet
|
100.0.0.0
|
100.64.0.0
|
100.128.0.0
|
100.192.0.0
|
…
|
Host
Awal
|
100.0.0.1
|
100.64.0.1
|
100.128.0.1
|
100.192.0.1
|
|
Host
Akhir
|
100.63.255.254
|
100.127.255.254
|
100.191.255.254
|
100.255.255.254
|
|
Broadcast
|
100.63.255.255
|
100.127.255.255
|
100.191.255.255
|
100.255.255.255
|
3 120.0.0.0/12
·
11111111.11110000.00000000.00000000
·
Subnet Mask :
255.240.0.0
·
Jumlah Subnet :
24 = 16
·
Jumlah Host/Subnet : 220 – 2 = 1.048.576 – 2 = 1.048.574
·
Blok Subnet :
220/256/256=16 (0,16,32,48, 64, 80, 96, 112, 128, 144, 160, 176,
192, 208, 224, 240)
Subnet
|
120.0.0.0
|
120.16.0.0
|
…
|
120.240.0.0
|
…
|
Host
Awal
|
120.0.0.1
|
120.16.0.1
|
120.240.0.1
|
||
Host
Akhir
|
120.15.255.254
|
120.16.255.254
|
120.255.255.254
|
||
Broadcast
|
120.15.255.255
|
120.31.255.255
|
120.255.255.255
|
Contoh Subnetting Kelas B
4 128.1.0.0/16
·
11111111.111111111.00000000.00000000
·
Subnet Mask :
255.255.0.0
·
Jumlah Subnet :
20 = 1
·
Jumlah Host/Subnet : 216 – 2 = 65536 - 2=65534
·
Blok Subnet :
216 / 256 = 65536 / 256 = 256
Subnet
|
128.1.0.0
|
128.2.0.0
|
128.3.0.0
|
….
|
Host Awal
|
128.1.0.1
|
128.2.0.1
|
128.3.0.1
|
|
Host Akhir
|
128.1.255.254
|
128.2.255.254
|
128.3.255.254
|
|
Broadcast
|
128.1.255.255
|
128.2.255.255
|
128.3.255.255
|
5 150.150.0.0/18
·
11111111.11111111.11000000.00000000
·
Subnet Mask :
255.255.192.0
·
Jumlah Subnet :
22 = 4
·
Jumlah Host/Subnet : 214 – 2 = 16384 – 2 = 16382
·
Blok Subnet :
214/256 = 16384/256 = 64 (0,64,128,192)
Subnet
|
150.150.0.0
|
150.150.64.0
|
….
|
150.150.192.64.0
|
…
|
Host
Awal
|
150.150.0.1
|
150.150.64.1
|
150.150.192.64.1
|
||
Host
Akhir
|
150.150.63.254
|
150.150.127.254
|
150.150.255.254
|
||
Broadcast
|
150.150.63.255
|
150.150.127.255
|
150.150.255.255
|
6 190.190.0.0/20
·
11111111.11111111.11110000.00000000
·
Subnet Mask :
255.255.240.0
·
Jumlah Subnet :
24 = 16
·
Jumlah Host/Subnet : 212 – 2 = 4096 – 2 = 4094
·
Blok Subnet :
212/256 = 4096/256 = 16 (0,16,32,48, 64, 80, 96, 112, 128, 144, 160,
176, 192, 208, 224, 240)
Subnet
|
190.190.0.0
|
190.190.16.0
|
…
|
190.190.240.0
|
…
|
Host
Awal
|
190.190.0.1
|
190.190.16.1
|
190.190.240.1
|
||
Host
Akhir
|
190.190.15.254
|
190.190.31.254
|
190.190.255.254
|
||
Broadcast
|
190.190.15.255
|
190.190.31.255
|
190.190.255.255
|
Contoh Subnetting Kelas C
7 192.168.1.0/24
·
11111111.111111111.11111111.00000000
·
Subnet Mask :
255.255.255.0
·
Jumlah Subnet :
20 = 1
·
Jumlah Host/Subnet : 28 – 2 = 256 - 2=254
·
Blok Subnet :
28 = 256
Subnet
|
192.168.1.0
|
192.168.2.0
|
192.168.3.0
|
….
|
Host Awal
|
192.168.1.1
|
192.168.2.1
|
192.168.3.1
|
|
Host Akhir
|
192.168.1.254
|
192.168.2.254
|
192.168.3.254
|
|
Broadcast
|
192.168.1.255
|
192.168.2.255
|
192.168.3.255
|
8 200.200.200.0/26
·
11111111.11111111.11111111.11000000
·
Subnet Mask :
255.255.255.192
·
Jumlah Subnet :
22 = 4
·
Jumlah Host/Subnet : 26 – 2 = 64 – 2 = 62
·
Blok Subnet :
26 = 64 (0,64,128,192)
Subnet
|
200.200.200.0
|
200.200.200.64
|
200.200.200.128
|
200.200.200.192
|
…
|
Host
Awal
|
200.200.200.1
|
200.200.200.65
|
200.200.200.129
|
200.200.200.193
|
|
Host
Akhir
|
200.200.200.62
|
200.200.200.126
|
200.200.200.190
|
200.200.200.254
|
|
Broadcast
|
200.200.200.63
|
200.200.200.127
|
200.200.200.191
|
200.200.200.255
|
9 195.195.25.0 /30
·
11111111.11111111.11111111.11111100
·
Subnet Mask :
255.255.255.252
·
Jumlah Subnet :
26 = 64
·
Jumlah Host/Subnet : 22 – 2 = 4 – 2 = 2
·
Blok Subnet :
22= 4
Subnet
|
195.195.25.0
|
195.195.25.4
|
…
|
195.195.25.252
|
…
|
Host Awal
|
195.195.25.1
|
195.195.25.5
|
195.195.25.253
|
||
Host
Akhir
|
195.195.25.2
|
195.195.25.6
|
195.195.25.254
|
||
Broadcast
|
195.195.25.3
|
195.195.25.7
|
195.195.25.255
|
