Subnetting Question

[xedgex]

I am studying Cisco material and came across one problem with a solution but their solution I can't make sense out of.

Can anyone tell me what this means and HOW to do it?
Step 3: Perform a binary AND operation of the IP address and the subnet mask to calculate the binary equivalent of the subnet.


Step 3 is the 3rd * listed here, I dont understand how you get to this point, I see the pattern and the ending digits but I'm not grasping it;

* 192.168.10.22 = 11000000 10101000 00010010 00010110
* 255.255.255.248 = 11111111 11111111 11111111 11111000
* Subnet = 11000000 10101000 00010010 00010000

 

[unclerico]

Binary AND operations go like this:
1 and 1 = 1
0 and 1 = 0
0 and 0 = 0

In your problem you only need to concentrate on the fourth octet since it is the one that you are borrowing bits from. So take 22 and 248 and break it down into the binary equivalent; 00010110 and 11111000.

00010110
11111000
--------
00010000

Subnet = 16

192.168.10.16/29


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