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difference between subnet mask and wildcard mask

Friends,

Pls let me know the difference between the wildcard mask and subnet mask.

regards

Sara

1 REPLY

Re: difference between subnet mask and wildcard mask

Subnet mask-A 32-bit combination used to describe which portion of an address refers to the subnet/network and which part refers to the host.

It is used alongwith IP Address.

Wildcard Mask- To indicate to the IOS software whether to check or ignore corresponding IP address bits when comparing the address bits in an access list entry , OSPF/EIGRP network command..

A wildcard mask is sometimes referred to as an inverted mask because a 1 and 0 mean the opposite of what they mean in a subnet (network) mask

e.g.

/30 : 255.255.255.252 subnet mask

0 . 0 . 0 . 3 wildcard mask

/24 : 255.255.255.0 subnet mask

0 . 0 . 0 . 255 wildcard mask

HTH..rate if useful..

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