1Introduction to LANIntroduction to LANTDC 363TDC 363Lecture 05Lecture 05Nt rkOprti S tmNt rkOprti S tm02/07/081TDC363-05Network Operating Systems Network Operating Systems Windows Based NetworkingWindows Based NetworkingNetWare Based NetworkingNetWare Based NetworkingBook Reading: Chapters 8 Book Reading: Chapters 8 Course OutlineCourse Outline Network operating system (NOS)Network operating system (NOS) Windows 2003 Server Windows 2003 Server –– Functions and FeaturesFunctions and FeaturesWindows Active DirectoryWindows Active Directory02/07/082TDC363-05Windows ctive DirectoryWindows ctive Directory Windows Network AdministrationWindows Network Administration Novell Novell ––NetWareNetWare Novell Novell -- eDirectoryeDirectoryWhat is NOS?What is NOS? NOS: Software to manage network resourcesNOS: Software to manage network resources NOS vs. OS NOS vs. OS  Workgroup vs. ClientWorkgroup vs. Client--Server NOSServer NOS If you have a network, you need NOS.If you have a network, you need NOS.Ik i iihIk i iih02/07/083TDC363-05In a workgroup environment, everyone is using the same In a workgroup environment, everyone is using the same NOS.NOS. In a clientIn a client--server environment, you have client NOS and server environment, you have client NOS and server NOS.server NOS. Examples of NOS:Examples of NOS: Windows 2003, NetWare, UNIX/LinuxWindows 2003, NetWare, UNIX/Linux2Network Resource ManagementNetwork Resource ManagementApplication-1 Application-2 Application-2Workstation 1 Workstation 2Application-1 Application-3Workstation 302/07/084TDC363-05Network Operating SystemNetwork Resource 1 Network Resource 2 Network Resource 3Objects managed by NOS?Objects managed by NOS? UsersUsers How do I create a user account?How do I create a user account? How do I group users?How do I group users? FilesFiles How do I let users share files with one another?How do I let users share files with one another?02/07/085TDC363-05 PrintersPrinters How does a user print a file?How does a user print a file? NetworkNetwork How does a user surf the Internet?How does a user surf the Internet? How does a user send and receive eHow does a user send and receive e--mails?mails? MiscellaneousMiscellaneousI ::= network system administratorClient/Server NOSClient/Server NOSClient ManagementClient Management Creating client accounts and enabling them to Creating client accounts and enabling them to connect to the networkconnect to the network Managing client accountsManaging client accounts02/07/086TDC363-05 Enabling clients to share resourcesEnabling clients to share resources Managing client access to shared resourcesManaging client access to shared resources Enabling clients to communicate with other Enabling clients to communicate with other clientsclients3Client/Server CommunicationClient/Server Communication3. Client sends a request to the server.3. Client sends a request to the server.02/07/087TDC363-051.1. Client initiates a request.Client initiates a request.2.2. Client performs preClient performs pre--request processingrequest processing4. Server executes the request and Server executes the request and get the results.get the results.5. Server sends the results to the client.5. Server sends the results to the client.6. Client perform post6. Client perform post--request request processing.processing.ThinThin Client ApplicationsClient Applications What is it?What is it? An application that requires little resource on An application that requires little resource on the client where the majority of the execution the client where the majority of the execution is performed on the server.is performed on the server.02/07/088TDC363-05Advantage: Advantage:  Ease of management (centrally controlled)Ease of management (centrally controlled) Ease of deploymentEase of deployment Can you give an example of thin client Can you give an example of thin client application?application?Users and GroupsUsers and Groups User: individualsUser: individuals Group: a group of users with similar needs and restrictions.Group: a group of users with similar needs and restrictions. Advantage: ease of account managementAdvantage: ease of account management A user could be in multiple groups.A user could be in multiple groups.02/07/089TDC363-054NOS Common TerminologyNOS Common Terminology Directory: a list that organizes resources and associates Directory: a list that organizes resources and associates them with the same properties and characteristicsthem with the same properties and characteristics It is a mapping of an object name and its physical location.It is a mapping of an object name and its physical location. Directory is NOT the same as file directory.Directory is NOT the same as file directory.Object: Representation of aObject: Representation of athingthingororpersonpersonassociatedassociated02/07/0810TDC363-05Object: Representation of a Object: Representation of a thingthingor or personpersonassociated associated with the networkwith the network A distinct named entity representing a network resourceA distinct named entity representing a network resource Attributes: Properties associated with an objectAttributes: Properties associated with an object Schema: The structure of objects in a directory.Schema: The structure of objects in a directory.Common Terminology (cont.)Common Terminology (cont.) ContainerContainer Logically defined receptacles that serve to group Logically defined receptacles that serve to group similar objectssimilar objects Objects that contain other objects.Objects that contain other objects.02/07/0811TDC363-05 [User] account[User] account Tree: Logical representation of multiple, Tree: Logical representation of multiple, hierarchical levels in a directoryhierarchical levels in a directory Forest: multiple treesForest: multiple treesNOS NOS DirectoryDirectory SchemaSchemaSet of definitions of objectSet of definitions of object02/07/0812TDC363-05Set of definitions of object Set of definitions of object types and information types and information associated with those objects associated with those objects that the Active Directory that the Active Directory