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DNS over TLS
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Application Layer — DNS
Protocol Overview
Full Name
DNS over TLS
Abbreviation
DoT
OSI Layer
Application Layer
Category
DNS
Default Port
853
RFC
RFC 7858
About DoT
DNS resolution encrypted with TLS on a dedicated port. Provides DNS privacy while remaining distinguishable from web traffic.
Application Layer
DNS
Port 853
Standards Reference
DoT is defined in RFC 7858, published by the Internet Engineering Task Force (IETF). RFCs are the official standards documents for internet protocols and are freely available for public review.