VLSM
HITUNG
CEPAT VLSM
TABEL
CIDR
SUBNET
|
JUMLAH HOST
|
SUBNET MASK
|
/32
|
1
|
255.255.255.255
|
/31
|
2
|
255.255.255.254
|
/30
|
4
|
255.255.255.252
|
/29
|
8
|
255.255.255.248
|
/28
|
16
|
255.255.255.240
|
/27
|
32
|
255.255.255.224
|
/26
|
64
|
255.255.255.192
|
/25
|
128
|
255.255.255.128
|
/24
|
256
|
255.255.255.0
|
/23
|
512
|
255.255.254.0
|
/22
|
1024
|
255.255.252.0
|
/21
|
2048
|
255.255.248.0
|
/20
|
4096
|
255.255.240.0
|
/19
|
8192
|
255.255.224.0
|
/18
|
16384
|
255.255.192.0
|
/17
|
32768
|
255.255.128.0
|
Contoh Kasus:
a. Diketahui
network = 128.25.0.0/ 21
Tentukan
alokasi subnetwork masing-masing
Network
A= 31 PC
Network
B= 255 PC
Network
C= 100 PC
Network
D= 525 PC
Network
E= 10 PC
Langkah
pertama urutkan dahulu dari jumlah host yang paling banyak.
Network D= 525 PC
Network B= 255 PC
Network C= 100 PC
Network A= 31 PC
Network E= 10 PC
Kemudian
kerjakan dari host yang paling banyak dan gunakan subnet yang memungkinkan
dengan jumlah host untuk menghitungnya.
1.
Network D
255.255.255.255
255.255.254. 0
1.255
IP Network =
128.25.0.0
IP Host =
128.25.0.1 - 128.25.1.254
IP Broadcast =
128.25.1.255
Lanjutkan
perhitungan dengan melanjutkan subnetworknya.
2.
Network B
255.255.255.255
255.255.255. 0
255
IP Network =
128.25.2.0
IP Host =
128.25.2.1 - 128.25.2.254
IP Broadcast =
128.25.2.255
3.
Network C
255.255.255.255
255.255.255.128
127
IP Network =
128.25.3.0
IP Host =
128.25.3.1 - 128.25.3.126
IP Broadcast =
128.25.3.127
4.
Network A
255.255.255.255
255.255.255.224
31
IP Network =
128.25.3.128
IP Host =
128.25.3.129 - 128.25.3.158
IP Broadcast =
128.25.3.159
5.
Network E
255.255.255.255
255.255.255.240
15
IP Network =
128.25.3.160
IP Host =
128.25.3.161 - 128.25.3.174
IP Broadcast =
128.25.3.175
b. Diketahui
network = 123.45.0.0/ 22
Tentukan
alokasi subnetwork masing-masing
Network
A= 14 PC
Network
B= 26 PC
Network
C= 65 PC
Network
D= 29 PC
Network
E= 300 PC
Network
F= 150 PC
Urutkan
dahulu dari jumlah host yang paling banyak
Network E= 300 PC
Network F= 150 PC
Network C= 65 PC
Network D= 29 PC
Network B= 26 PC
Network A= 14 PC
Kerjakan
dari host yang paling banyak dan gunakan subnet yang memungkinkan dengan jumlah
host untuk menghitungnya.
1.
Network
E
255.255.255.255
255.255.254. 0
1.255
IP Network = 123.45.0.0
IP Host = 123.45.0.1 – 123.45.1.254
IP Broadcast = 123.45.1.255
Lanjutkan
perhitungan dengan melanjutkan subnetworknya.
2.
Network
F
255.255.255.255
255.255.255. 0
255
IP Network = 123.45.2.0
IP Host = 123.45.2.1 – 123.45.1.254
IP Broadcast = 123.45.2.255
3.
Network
C
255.255.255.255
255.255.255.128
127
IP Network = 123.45.3.0
IP Host = 123.45.3.1 – 123.45.3.126
IP Broadcast = 123.45.3.127
4.
Network
D
255.255.255.255
255.255.255.224
31
IP Network = 123.45.3.128
IP Host = 123.45.3.129 – 123.45.3.158
IP Broadcast = 123.45.3.159
5.
Network
B
255.255.255.255
255.255.255.224
31
IP Network = 123.45.3.160
IP Host = 123.45.3.161 – 123.45.3.189
IP Broadcast = 123.45.3.190
6.
Nework
A
255.255.255.255
255.255.255.240
15
IP Network = 123.45.3.191
IP Host = 123.45.3.192 – 123.45.3.204
IP Broadcast = 123.45.3.205
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