ETSI TR 184 012 describes different use cases for the usage of the DNS protocol (e.g. Service Location,
NP/ENUM, address resolution) in IP based operators networks. The DNS base protocol itself is defined in
RFC 1035 [i.16].The present document describes the behaviour and details for DNS protocol usage in IP based operators networks,
transport options for DNS messages, DNS protocol behaviour and configuration as well as options to make the usage of
the DNS protocol more reliable (e.g. timer characteristics etc.).
br>The use cases described here and options to make the usage of the DNS protocol more reliable are principal ones for
network operators and not intended to be exhaustive.