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e:edns [2018/08/10 18:16] (current)
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 +# EDNS
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 +Extension mechanisms for DNS - EDNS - is a specification for expanding the size of several parameters of the Domain Name System [DNS](../​d/​dns) protocol.
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 +EDNS adds information to DNS messages in the form of pseudo-resource-records included in the "​additional data" section of a DNS message in both requests and responses.
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 +EDNS is needed for [DNS Security Extensions](../​d/​dnssec).
 +