__Subnetting Calculation:__In CCNA Day 04 we had a glance about Subnetting, today we will learn how to calculate the IP range for the given IP Address

[01] Here we need to find out the 9th subnet for the IP 192

**●**168

**●**10

**●**0

Below is the simple formula to start calculating subnet range:

2x -2 = n

Here n = number of subnet

x = number of bits to borrow from Host bits

**Step 01:**

Here n = 9

To find out x value follow the calculation below:

2x -2 = n

2x -2 = 9

2x = 9 + 2

2x = 11 [ 24 = 16 ]

Hence 24 = 16 > 11

So x = 4

**Step 02:**

For Subnetting we need to Borrow bits from Host, hence wee need to Borrow the bit from left to right:

As the IP class range comes under Class C, so host is of 8 bit

**Class C: Network ● Network ● Network ● Host**

**Left >>>>> 1 1 1 1 / 0 0 0 0 <<<<< Right**

Hence Subnet is 255 ● 255 ● 255 ● 240

**Step 03:**

To find out 9th subnet we required to convert 9 to binary number

9 = 1001

To find out Network ID, in host all zero other than borrowed

To find out Minimum IP range in host all zero last one other than borrowed

To find out Maximum IP range in host all one last bit zero other than borrowed

To find out Broadcast IP in host all one other than borrowed bit

See the below calculation for more clarity

**Network ID : 1 0 0 1 / 0 0 0 0 = 144**

**Min. IP Range : 1 0 0 1 / 0 0 0 1 = 145**

**Max. IP Range : 1 0 0 1 / 1 1 1 0 = 194**

**Broadcast IP : 1 0 0 1 / 1 1 1 1 = 195**

**Hence**

**Network IP = 192 ● 168 ● 10 ● 144**

**Min. IP = 192 ● 168 ● 10 ● 145**

**Max. IP = 192 ● 168 ● 10 ● 194**

**Broadcast IP = 192 ● 168 ● 10 ● 195**

For Class B we need to borrow from 16 bit of Host Octet and

For Class A we need to borrow from 24 bit of Host Octet

If you feel any issues, contact me on ccnain30days@gmail.com

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__Related Articles:__**CCNA Day 04**

**<<<<< Previous Articles = Next Articles >>>>>**

**CCNA Day 06**

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__Other Articles:__**Binary Number System - Decimal Number System -**

**Network Classes**

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