What is Global Catalogue Server

A global catalogue is a domain controller that stores information about all the objects in the Active directory Forest. So with the help of Global catalogue we can search objects within the global catalogue server without searching in separate domain controllers every time.Global catalogue server stores full,writable replicas of schema and configuration directory partitions and full,writable replica of domain directory partition for the domain that it is hosting .
Global catalogue server also stores partial , read only replica of every other domain in forest .


How Active Directory Replication Works

Active Directory uses Knowledge Consistency Checker for replication between domain controllers. KCC creates a connection object that represents a replication connection between source domain controller to a destination domain controller.

The KCC creates connection objects automatically. The Connection objects created by KCC is stored under Active Directory Sites and Services in the NTDS settings. KCC creates replication routes by creating one way inbound connection objects that define connetions from other domain controllers.

The KCC is a inbuilt process which runs on all domain controllers and generates replication topology for active directory. It generates different replication topology for both Intrasite and Intersite . In intrasite the connections between writable domain controllers is bidirectional with shortcut connections to reduce latency. In Intersite replication spanning tree topology is used. When you have more than one site you need to configure site links between sites and KCC in each site automatically creates connection.


Windows Administrator Interview Most Likely Questions

1) Difference Between Windows 2003 and Windows 2008

2) Difference Between Windows 2008 and Windows 2012

3) What are the different types of RAID and differnce between the Types of RAID

4)  Which are the Active Directory FSMO Roles and Explain them

5) What are the Different Types of Quorum in a failover Cluster

6) The reason why BSOD ( Blue Screen of Death ) errors occur and how to troubleshoot the Issue .

7) What are the Different Editions of Windows 2008 OS and Windows 2012 OS

8) How Many VMs can be Created on Windows 2008 Std Edition , Windows 2008 Ent Edition , Windows 2008 Datacenter Edition ( Default Hyper V Virtulisation Case )

9) How Many VMs can be created on Windows 2012 Std Edition , Windows 2012 DC edition ( Default Hyper V Virtulisation Case )

10) Ports Numbers of  http , https , DNS ,  smtp , pop3 , Imap, dhcp , ftp , ldap , Global Catalouge

11) Difference between IIS 6.0 , IIS 7.0 , IIS 8.0

12) IIS 6.0 processing Architecture , IIS 8.0 Processing Architecture

13) Types of DNS zones

14) Types of DNS records

15) What is the path of http.sys file on Windows

16) What is the path of hosts file on Windows

17) What is the path of IIS log files on Windows

18) What is NTDS.dit and the path of NTDS.dit

19) Difference between Basic Disk and Dynamic Disk

20 ) Hyper V hard Disk format and Vmware Hard Disk Format .


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