SUBNETTING dan VSLM

Soal :

• Network ID IP Address yang diberikan : 172.16.0.0/16
• Divisi HRD : 10 PC
• Divisi Finance : 25 PC
• Divisi TI : 10 PC
• Divisi Marketing : 50 PC
• IP yang digunakan dimulai dari 172.16.X.N dimana X = Absen dan N = nilai IP yang didapat
• Data : Jayan Nusantara - 50407468 - 22
  

Jawab :

nilai X = 22, Sehingga IP menjadi 172.16.22.0/16 untuk IP awal

VLSM

Marketing : 50 PC + 1 router + 1 network + 1 broadcast = 53
Net Prefix : 2ⁿ – 2 = 50, n = 6, 2⁶ – 2 = 62, maka 32 – 6 = 26
Netmask : 255.255.255.192 atau 11111111.11111111.11111111.11 000000
Network ID : 172.16.22.0/26
Range Host : 172.16.22.1/26 – 172.16.22.62/26
Broadcast ID : 172.16.22.63/26

Finance : 25 PC + 1 router + 1 network + 1 broadcast = 28
Net Prefix : 2ⁿ – 2 = 25, n = 5, 2⁵ – 2 = 30, maka 32 – 5 = 27
Netmask : 255.255.255.224 atau 11111111.11111111.11111111.111 00000
Network ID : 172.16.22.64/27
Range Host : 172.16.22.65/27 – 172.16.22.94/27
Broadcast ID : 172.16.22.95/27

HRD : 10 PC + 1 router + 1 network + 1 broadcast = 13
Net Prefix : 2ⁿ – 2 = 10, n = 4, 2⁴ – 2 = 14, maka 32 – 4 = 28
Netmask : 255.255.255.240 atau 11111111.11111111.11111111.1111 0000
Network ID : 172.16.22.96/28
Range Host : 172.16.22.97/28 – 172.16.22.110/28
Broadcast ID : 172.16.22.111/28

TI : 10 PC + 1 router + 1 network + 1 broadcast = 13
Net Prefix : 2ⁿ – 2 = 10, n = 4, 2⁴ – 2 = 14, maka 32 – 4 = 28
Netmask : 255.255.255.240 atau 11111111.11111111.11111111.1111 0000
Network ID : 172.16.22.112/28
Range Host : 172.16.22.113/28 – 172.16.22.126/28
Broadcast ID = 172.16.22.127/28

Tabel

Divisi	Jumlah PC	Net Prefix	Jumlah Host	Net Mask	Network ID	Range Host ID	Broadcast ID
Marketing	50	26	64	255.255.255.192	172.16.22.0/26	172.16.22.1/26 – 172.16.22.62/26	172.16.22.63/26
Finance	25	27	32	255.255.255.224	172.16.22.64/27	172.16.22.65/27 – 172.16.22.94/27	172.16.22.95/27
HRD	10	28	16	255.255.255.240	172.16.22.96/28	172.16.22.97/28 – 172.16.22.110/28	172.16.22.111/28
IT	10	28	16	255.255.255.240	172.16.22.112/28	172.16.22.113/28 – 172.16.22.126/28	172.16.22.127/28

Skema Jaringan

Skema Sederhana menggunakan 3 router :