3 Resource Records

Front 1

Start of Authority record

Back 1

Which Server is authoritative for a zone. In charge of zone updates. Primary domain controller and responsible person in form of namespace hostmaster.company.com and ttl time to live interval

Front 2

host "a" record

Back 2

contains name of host and corresponding I P address

Front 3

n s or name server records

Back 3

d n s database tells which are the name servers for a zone. these are essentially the d n s servers. tells clients which machine can run dns queries.

Front 4

s r v records

Back 4

s r v records allow a particular server to indicate that it can handle particular requests. for example, an l d a p server can add an s r v record to indicate that it can handle l d a p requests. the domain controllers can add an s r v record that advertise that they can handle global catalog requests. this is useful for active directory domain services .