Merge pull request #340 from AdguardTeam/AGM-2572-add-article-dns-protocols

Fixes in choosing-a-protocol.md and overview.md

Author: puglieri

docs/public-dns/choosing-a-protocol.md

@@ -21,11 +21,11 @@ However, it can be unstable and result in performance issues. When all data pack
 
 ### DNS-over-QUIC (DoQ)
 
-DNS-over-QUIC is a DNS protocol that uses the QUIC transport layer protocol to transmit DNS requests. It solves one of the main problems with the DoH protocol: instability due to head-of-line blocking.
+DNS-over-QUIC is a DNS protocol that uses the QUIC transport layer protocol to transmit DNS requests. It solves one of the main problems with the DoH protocol: head-of-line blocking.
 
 Since DoQ uses the QUIC protocol to keep DNS activity separate from web traffic, it avoids the timing issues observed in DoH. Consequently, it doesn’t reveal any traffic patterns. This makes it harder to link your DNS queries to your browsing activity, even though the traffic itself is easier to spot.
 
-If you’re looking for a combination of privacy and stability, DoQ is usually the best choice.
+However, DoQ remains an experimental protocol and might face stability problems or be blocked by ISPs and censors. If you are not ready to deal with that, it might not be the best choice.
 
 ![DoH vs. DoQ *border](https://cdn.adtidy.org/blog/new/gy178dohdoq.jpg)
 

docs/public-dns/overview.md

@@ -43,3 +43,13 @@ Unlike with Google DNS, AdGuard DNS doesn’t support `edns_client_subnet` and `
 ### Rate limit
 
 DNS rate limiting is a technique used to regulate the amount of traffic a DNS server can handle within a specific time period. We offer the option to increase the default limit for Team and Enterprise plans of Private AdGuard DNS. For more information, please [read the related article](/private-dns/server-and-settings/rate-limit.md).
+
+### DNSCrypt
+
+AdGuard DNS allows you to use a specific encrypted protocol — DNSCrypt. Thanks to it, all DNS requests are being encrypted, which protects you from possible request interception and subsequent eavesdropping and/or alteration.
+
+:::note
+
+This is an obsolete protocol with restricted support.
+
+:::