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Subnet Zero and the All-Ones Subnet

December 05, 2011 Bogdan No comments

RFC 1878 states:
“This practice (of excluding all-zeros and all-ones subnets) is obsolete. Modern software will be able to utilize all definable networks.”

Today, the use of subnet zero and the all-ones subnet is generally accepted and most vendors support their use. However, on certain networks, particularly the ones using legacy software, the use of subnet zero and the all-ones subnet can lead to problems.

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