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What is LDAP?
LDAP (Lightweight Directory Access Protocol) is a protocol for communications
between LDAP servers and LDAP clients. LDAP servers store "directories"
which are access by LDAP clients. LDAP is called lightweight because it is a smaller
and easier protocol which was derived from the X.500 DAP (Directory Access
Protocol) defined in the OSI network protocol stack. LDAP servers store a hierarchical directory of information. In LDAP parlance, a fullyqualified name for a directory entry is called a Distinguished Name. Unlike DNS (Domain Name Service) FQDN's (Fully Qualified Domain Names), LDAP DN's store the most significant data to the right.
The Four Models of LDAP
LDAP is defined by four models:
Model Description
Information Describes the structure of information stored in an LDAP directory
Naming Describes how information in an LDAP directory is organized and identified
Functional Describes what operations can be performed on the information stored in an LDAP directory Security Describes how the information in an LDAP directory can be protected from unauthorized access LDAP is extensible and can be used to store any type of data. Most interesting is that LDAP is being used as a core technology for most Single Sign On (SSO) implementations.
Can you connect Active Directory to other 3rd-party Directory Services?
Name a few options.
Yes, you can use dirXML or LDAP to connect to other directories
(ie. E-directory from Novell). Where is the AD database held? What other
folders are related to AD?
Support Files of Active Directory
The Active Directory support files are listed below. These are the files that you specify a location for when you promote a server to a domain controller: • Ntds.dit (NT Directory Services): Ntds.dit is the core Active Directory database. This file on a domain controller lists the naming contexts hosted by that particular domain controller. • Edb.log: The Edb.log file is a transaction log. When changes occur to Active Directory objects, the changes are initially saved to the transaction log before they are written to the Active Directory database. • Edbxxxxx.log: This is auxiliary transaction logs that can be used in cases where the primary Edb.log file fills up prior to it being written to the Ntds.dit Active Directory database. • Edb.chk: Edb.chk is a checkpoint file that is used by the transaction logging process. • Res log files: These are reserve log files whose space is used if insufficient space
exists to create the Edbxxxxx.log file. • Temp.edb: Temp.edb contains information on the transactions that are being
processed. • Schema.ini: The Schema.ini file is used to initialize the Ntds.dit Active Directory database when a domain controller is promoted.
LDAP (Lightweight Directory Access Protocol) is a protocol for communications
between LDAP servers and LDAP clients. LDAP servers store "directories"
which are access by LDAP clients. LDAP is called lightweight because it is a smaller
and easier protocol which was derived from the X.500 DAP (Directory Access
Protocol) defined in the OSI network protocol stack. LDAP servers store a hierarchical directory of information. In LDAP parlance, a fullyqualified name for a directory entry is called a Distinguished Name. Unlike DNS (Domain Name Service) FQDN's (Fully Qualified Domain Names), LDAP DN's store the most significant data to the right.
The Four Models of LDAP
LDAP is defined by four models:
Model Description
Information Describes the structure of information stored in an LDAP directory
Naming Describes how information in an LDAP directory is organized and identified
Functional Describes what operations can be performed on the information stored in an LDAP directory Security Describes how the information in an LDAP directory can be protected from unauthorized access LDAP is extensible and can be used to store any type of data. Most interesting is that LDAP is being used as a core technology for most Single Sign On (SSO) implementations.
Can you connect Active Directory to other 3rd-party Directory Services?
Name a few options.
Yes, you can use dirXML or LDAP to connect to other directories
(ie. E-directory from Novell). Where is the AD database held? What other
folders are related to AD?
Support Files of Active Directory
The Active Directory support files are listed below. These are the files that you specify a location for when you promote a server to a domain controller: • Ntds.dit (NT Directory Services): Ntds.dit is the core Active Directory database. This file on a domain controller lists the naming contexts hosted by that particular domain controller. • Edb.log: The Edb.log file is a transaction log. When changes occur to Active Directory objects, the changes are initially saved to the transaction log before they are written to the Active Directory database. • Edbxxxxx.log: This is auxiliary transaction logs that can be used in cases where the primary Edb.log file fills up prior to it being written to the Ntds.dit Active Directory database. • Edb.chk: Edb.chk is a checkpoint file that is used by the transaction logging process. • Res log files: These are reserve log files whose space is used if insufficient space
exists to create the Edbxxxxx.log file. • Temp.edb: Temp.edb contains information on the transactions that are being
processed. • Schema.ini: The Schema.ini file is used to initialize the Ntds.dit Active Directory database when a domain controller is promoted.
For Question & Answer on DNS, DNS Zones and AD etc. click here
For Question & Answer on IP Address,
Subnet Mask, ARP etc. click here
Subnet Mask, ARP etc. click here
For Question & Answer on DHCP and Its process etc. click here
For Question & Answer on DNS, DNS Zones etc. click here
For Question & Answer on Windows Clustering , NLB, WINS click here
For Question & Answer on IAS & RAS, PAT, NAT, VPN click here
For Question & Answer on Domain, DC, Active Directory and its features etc. click here
For Question & Answer on LDAP,AD- Structure & Namespace etc. click here
For Question & Answer on Application Partition, DC- Backup, Sysvol etc. click here
For Question & Answer on Recovery/Restore of DC & GC etc. click here
For Question & Answer on Global Catalog, REPLMON. LDP, ADSIEDIT etc. click here
For Question & Answer on Netdom, Sites, KCC, ISTG etc. click here
For Question & Answer on FSMO and its roles etc. click here
For Question & Answer on Active Directory (AD) & its backup etc. click here
For Question & Answer on GPO, GPC and GPT etc. click here
