Essential Services Overview
In this chapter Essential Services we will discuss some important points which are given below as
- Besides becoming the standard for the Internet, DNS, short for Domain Name System, is a hierarchical client/server-based distributed database management system that translates domain/hosts names to IP addresses.
- A fully qualified domain name (FQDN) describes the exact position of a host within a DNS hierarchy.
- The legacy naming service is Windows Internet Name Service or WINS, which translates from NetBIOS (computer name) to specify a network resource.
- When you share a directory, drive, or printer on a PC running Microsoft Windows or on a Linux machine running Samba, you can access the resource by using the Universal Naming Convention (UNC), also known as Uniform Naming Convention, to specify the location of the resource.
- Dynamic Host Configuration Protocol (DHCP) services automatically assign IP addresses and related parameters (including subnet mask and default gateway and length of the lease) so that a host can immediately communicate on an IP network when it starts.
- The Lightweight Directory Access Protocol, or LDAP, is an application protocol for querying and modifying data using directory services running over TCP/IP.
- Active Directory domains, trees, and forests are logical representations of network organization, which allow you to organize them in the best way to manage them.
- Sites and domain controllers represent the physical structure of a network.
- A site is one or more IP subnets that are connected by a high-speed link, typically defined by a geographical location.
- A domain controller is a Windows server that stores a replica of the account and security information for the domain and defines the domain boundaries.
- A server that is not running as a domain controller is known as a member server.
- To minimize traffic across a WAN link, bridgehead servers perform directory replication between two sites, whereas only two designated domain controllers talk to each other.
- Active Directory uses multimaster replication, which means that there is no master domain controller.
- Because there are certain functions that can only be handled by one domain controller at a time, Active Directory uses Flexible Single Master Operations (FSMO) roles.
- A global catalog holds replicate information of every object in a tree and forest.
- The functional level of a domain or forest controls which advanced features are available in the domain or forest.
- To help organize objects within a domain and minimize the number of domains, you can use organizational units, commonly known as OUs.
- You can delegate administrative control to any level of a domain tree by creating organizational units within a domain and delegating administrative control for specific organizational units to particular users or groups.
- A user account enables a user to log on to a computer and domain. As a result, it can used to prove the identity of a user, and this information can then be used to determine what a user can access and what kind of access he or she will have (authorization).
- Windows computer accounts provide a means for authenticating and auditing a computer’s access to a Windows network and to domain resources.
- A group is a collection of user accounts or computer accounts.
- Group Policy provides the centralized management and configuration of operating systems, applications, and user settings in an Active Directory environment.
- A right authorizes a user to perform certain actions on a computer.
- A permission defines the type of access that is granted to an object (an object can be identified with a security identifier) or object attribute.
Following topics will be discussed in this chapter Essential Services
A directory service stores, organizes, and provides access to information in a directory. Directory services are used for locating, managing, ...
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