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n/dns.md: add links to Wikipedia on ECS, Client-Subnet, fix link for DHCPv6 PD, link to PrivacyGuides DNS Overview as well
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n/dns.md
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n/dns.md
@ -65,10 +65,12 @@ least temporary. Thus I think this list belongs here close enough.
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## What is ECS?
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EDNS Client-Subnet is a DNS extension letting the authoritative nameserver
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[EDNS](https://en.m.wikipedia.org/wiki/Extension_Mechanisms_for_DNS) [Client-Subnet](https://en.wikipedia.org/wiki/EDNS_Client_Subnet) is a DNS extension letting the authoritative nameserver
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know your subnet, generally a `/24` (IPv4) or a `/56` (IPv6), but the revealed
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subnet size is up to your DNS resolver configuration.
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_See also simpler explanation at [PrivacyGuides.org DNS Overview](https://www.privacyguides.org/en/advanced/dns-overview/#what-is-edns-client-subnet-ecs)._
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- /24 is the first three parts of your IPv4 address e.g. 192.0.2.xxx.
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The last part of your IP address (the xxx) again is a number between 1
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to 254 (since 0 is reserved for the network itself and 255 is the
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@ -83,7 +85,7 @@ subnet size is up to your DNS resolver configuration.
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which is the most common way of getting IPv6 address in your local area
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network as opposed to IPv4 where you would have
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[Dynamic Host Configuration Protocol (DHCP)](https://en.m.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol).
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- Your router does get the IPv6 subnet assignment for LAN distribution by means of [DHCPv6 Prefix Delegation](https://en.wikipedia.org/wiki/Prefix_delegation) which is also common on mobile networks.
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- Your router does get the IPv6 subnet assignment for LAN distribution by means of [DHCPv6 Prefix Delegation](https://en.m.wikipedia.org/wiki/Prefix_delegation) which is also common on mobile networks.
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### Why to use ECS?
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