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Beginner

what is the difference a wildcard mask 1 and a wildcard mask 0

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Rising star

0-bit = match

1-bit = ignore

'Don't care bits' are represented by binary 1's whilst the 'Do care bits' are represented by binary 0's. The exact opposite of the subnet mask. Taking 192.168.1.32/27 as an example. Subnet mask - 255.255.255.224

 4th octet in decimal 32 4th octet in binary 0 0 1 0 0 0 0 0 4th octet mask in decimal 224 4th octet mask in binary 1 1 1 0 0 0 0 0 Now the 4th octet wildcard in binary 0 0 0 1 1 1 1 1 Now the 4th octet wildcard in decimal 31

- 255.255.255.224

-------------------

0.    0.    0.  31

2 REPLIES 2
Rising star

0-bit = match

1-bit = ignore

'Don't care bits' are represented by binary 1's whilst the 'Do care bits' are represented by binary 0's. The exact opposite of the subnet mask. Taking 192.168.1.32/27 as an example. Subnet mask - 255.255.255.224

 4th octet in decimal 32 4th octet in binary 0 0 1 0 0 0 0 0 4th octet mask in decimal 224 4th octet mask in binary 1 1 1 0 0 0 0 0 Now the 4th octet wildcard in binary 0 0 0 1 1 1 1 1 Now the 4th octet wildcard in decimal 31

- 255.255.255.224

-------------------

0.    0.    0.  31

Beginner