SUBNETTING CALCULATION
SUBNETTING CALCULATION
Subnetting
Calculation
Private addressing
scheme: 172.31.0.0 /16
1 IT Centre
and 10 Faculties. 11 subnet is needed.
To have 11 subnets,
we must find the nearest number which is not lesser than 11. In this case, 16
is the most suitable.
|
Position no. |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
|
Positional value |
128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
IP Address
Class – B
Default
Subnet Mask – 255.255.0.0
Number of
subnets – 11 ~ 16 = 2s = 16
Number of
bits borrowed = 2s = 16
2s = 24
s = 4
172.31.0.0
/20
New subnet
mask – 255.255.240.0
Quantity of
host per subnet – 2H – 2 = 212 – 2 = 4094 host
IP table:
|
Subnet No. |
Network Address |
IP Address Range |
Broadcast Address |
|
0 |
172.31.0.1 – 172.31.15.254 |
172.31.15.255 |
|
|
1 |
172.31.16.0 |
172.31.16.1 – 172.31.31.254 |
172.31.31.255 |
|
2 |
172.31.32.0 |
172.31.32.1 – 172.31.47.254 |
172.31.47.255 |
|
3 |
172.31.48.0 |
172.31.48.1 – 172.31.63.254 |
172.31.63.255 |
|
4 |
172.31.64.0 |
172.31.64.1 – 172.31.79.254 |
172.31.79.255 |
|
5 |
172.31.80.0 |
172.31.80.1 – 172.31.95.254 |
172.31.95.255 |
|
6 |
172.31.96.0 |
172.31.96.1 – 172.31.111.254 |
172.31.111.255 |
|
7 |
172.31.112.0 |
172.31.112.1 – 172.31.127.254 |
172.31.127.255 |
|
8 |
172.31.128.0 |
172.31.128.1 – 172.31.143.254 |
172.31.143.255 |
|
9 |
172.31.144.0 |
172.31.144.1– 172.31.159.254 |
172.31.159.255 |
|
10 |
172.31.160.0 |
172.31.160.1 – 172.31.175.254 |
172.31.175.255 |
|
11 |
172.31.176.0 |
172.31.176.1 – 172.31.191.254 |
172.31.191.255 |
|
12 |
172.31.192.0 |
172.31.192.1 – 172.31.207.254 |
172.31.207.255 |
|
13 |
172.31.208.0 |
172.31.208.1 – 172.31.223.254 |
172.31.223.255 |
|
14 |
172.31.224.0 |
172.31.224.1 – 172.31.239.254 |
172.31.239.255 |
|
15 |
172.31.240.0 |
172.31.240.1 – 172.31.255.254 |
172.31.255.255 |
Subnet 0 indicates
Faculty no.1: 172.31.0.0 /20
Subnet 1
indicates Faculty no.2: 172.31.16.0 /20
Subnet 2
indicates Faculty no.3: 172.31.32.0 /20
Subnet 3
indicates Faculty no.4: 172.31.48.0 /20
Subnet 4
indicates Faculty no.5: 172.31.64.0 /20
Subnet 5 indicates Faculty no.6: 172.31.80.0 /20
Subnet 6
indicates Faculty no.7: 172.31.96.0 /20
Subnet 7
indicates Faculty no.8: 172.31.112.0 /20
Subnet 8
indicates Faculty no.9: 172.31.128.0 /20
Subnet 9
indicates Faculty no.10: 172.31.144.0 /20
Subnet 10
indicates IT Center: 172.31.160.0 /20
IT Center
network address: 172.31.160.0
5th
available address:
1 – 172.31.160.1
2 – 172.31.160.2
3 – 172.31.160.3
4 – 172.31.160.4
5 – 172.31.160.5
Ulearn
System Server is assigned to 172.31.160.5 as it’s IP address.
Comments
Post a Comment