diff --git a/optional.md b/optional.md index 44c64df..5373530 100644 --- a/optional.md +++ b/optional.md @@ -66,7 +66,7 @@ recommended. ## Dynamic Updates (DNS UPDATE) Defined in [RFC 2136](https://tools.ietf.org/html/rfc2136), DNS UPDATE is a -somewhat under used extension that allows a client to request an authoritative +somewhat underused extension that allows a client to request an authoritative server add or remove RR or RRSETs in a zone. While primarily useful for allowing distributed management of a zone, a side benefit for authoritative server implementors is effectively free support for new RR types as the burden