- HRD = 10 PC
- Finance = 25 PC
- IT = 10 PC
- Management = 50 PC
Dihubungkan dengan skema seperti di bawah ini :
Hitunglah pembagian IP Addressnya dengan VLSM !!!
Dengan syarat, IP = 172.16.X.N
Dimana X adalah 6 (Nomor Absen Saya), dan N adalah range yang dicari.
Jawab :
1. Subnet HRD
- 10 PC + 1 Router + 1 NA + 1 BA = 13
- Decimal 13 = Biner 1101 = 4 bit
- Jumlah Max IP Address = 2^4 = 16 IP
- Subnet Mask = 11111111.11111111.11111111.11110000 = 255.255.255.240
- Prefix = 32 - 4 = 28
- Network Address = 172.16.6.0
- Broadcast Address = 172.16.6.15
- Range IP = 172.16.6.1 - 172.16.6.14
- Gateway ambil Range IP pertama = 172.16.6.1
2. Subnet Finance
- 25 PC + 1 Router + 1 NA + 1 BA = 28
- Decimal 28 = Biner 11100 = 5 bit
- Jumlah Max IP Address = 2^5 = 32 IP
- Subnet Mask = 11111111.11111111.11111111.11100000 = 255.255.255.224
- Prefix = 32 - 5 = 27
- Network Address = 172.16.6.16
- Broadcast Address = 172.16.6.47
- Range IP = 172.16.6.17 - 172.16.6.46
- Gateway ambil Range IP pertama = 172.16.6.17
3. Subnet IT
- 10 PC + 1 Router + 1 NA + 1 BA = 13
- Decimal 13 = Biner 1101 = 4 bit
- Jumlah Max IP Address = 2^4 = 16 IP
- Subnet Mask = 11111111.11111111.11111111.11110000 = 255.255.255.240
- Prefix = 32 - 4 = 28
- Network Address = 172.16.6.48
- Broadcast Address = 172.16.6.63
- Range IP = 172.16.6.49- 172.16.6.62
- Gateway ambil Range IP pertama = 172.16.6.49
4. Subnet Marketing
- 50 PC + 1 Router + 1 NA + 1 BA = 53
- Decimal 53 = Biner 110101 = 6 bit
- Jumlah Max IP Address = 2^6 = 64 IP
- Subnet Mask = 11111111.11111111.11111111.11000000 = 255.255.255.192
- Prefix = 32 - 6 = 26
- Network Address = 172.16.6.64
- Broadcast Address = 172.16.6.127
- Range IP = 172.16.6.65 - 172.16.6.128
- Gateway ambil Range IP pertama = 172.16.6.65
Di bawah ini adalah tabel rincian hasil perhitungan dengan VLSM :
| Bagian | Host | Subnet Mask | Network | Broadcast | Range IP | Gateway |
| HRD | 10 | 255.255.255.240 | 172.16.6.0 | 172.16.6.15 | 172.16.6.1 - 172.16.6.14 | 172.16.6.1 |
| Financial | 25 | 255.255.255.224 | 172.16.6.16 | 172.16.6.47 | 172.16.6.17- 172.16.6.46 | 172.16.6.17 |
| IT | 10 | 255.255.255.240 | 172.16.6.48 | 172.16.6.63 | 172.16.6.49- 172.16.6.62 | 172.16.6.49 |
| Marketing | 50 | 255.255.255.192 | 172.16.6.64 | 172.16.6.127 | 172.16.6.65- 172.16.6.128 | 172.16.6.65 |
