When you enter the main controller to domain their domain controller advertises its services by creating
service resource records or SRB also known as the key to records in DNS.
Unlike hosted resource records or a resource records which map host names to IP addresses it's our real
records.
Map services to host names for example to publish its ability to provide authentication and Directory
Access at domain controller registers.
Gerber US version 5 protocol and Lightweight Directory Access Protocol or ELL Deb as service records.
This is a real records are ready to several folders within the forests DNS zones within that domain
zone a folder named underscore DCP contains the SRP records for all domain controller center domain.
Additionally within the domain zone is a folder named sites which contains sub folders for each site
that is configured to the domain each site specific folder contains a survey records that represents
services that are available in the site.
For example if a domain controller is located in a site is a review record is that the pass underscore
sides backslash site name backslash underscore to C.P. where site name is a site's name your site's
name.
A typical a service record contains the following information.
The service name and port protocol and hostname service name and port.
This portion of the service record indicates a service with a fixed port.
It does not have to be a well-known board as the records include all DEP which is Port 389 core boroughs
which is Port 88 Cobra's version 5 authentication protocol which is Port 464 64 and global catalog services
which is port sorted to sixty eight.
As for protocol the Transmission Control Protocol or DCP or use and data grim protocol or UDP is indicated
as a transport protocol for service the same service can use both protocols in separate as there were
records Gerber records for example are registered for both to CB and to UDP Microsoft clients use only
DCP but Unix clients can use both UDP anticipate as for hostname information the hostname corresponds
to the host resource record or a resource record for the server that hosts the service when a client
queries for a service the DNS server returns the service record and associated host resource records
so the client does not need to submit a separate where to resolve the service IP address the service
name in a service record follows the standard DNS hierarchy with DOD separate and the components for
example a domain controllers Gerber a service is registered as Gerber as DOD underscored to Sebi DoD
side name DoD side DOD domain name and Cerberus is a Gerber key distribution center that uses to B as
its transport protocol underscore disappear it is and it is the P based service on the site site name
is a site of the domain controller that is registering the service undisclosed sites is all sites that
are registered with DNS and domain name is a domain or zone such as com torso dot com.