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TLSA stands for Transport Layer Security Authentication, an integral part of the Domain Name System Security Extensions (DNSSEC).

Synonyms - Transport Layer Security Authentication
Top-level domain

A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet.

Synonyms - TLD
Transport Layer Security

Transport Layer Security (TLS), and its now-deprecated predecessor, Secure Sockets Layer (SSL), are cryptographic protocols designed to provide communications security over a computer network.

Synonyms - TLS