CHAPTER Introduction to LANs 1/3/2019 CHAPTER Introduction to LANs (c) Copyright N Ganesan

Chapter 19 Purpose and Use of a Network 1/3/2019 MODULE Purpose and Use of a Network (c) Copyright N Ganesan

Definition of a Network Chapter 19 1/3/2019 Definition of a Network Composed of computing and information devices connected together clients servers shared printers other shared devices internetworking devices link to the external world Etc. (c) Copyright N Ganesan

Purpose Access and share local resources and information Chapter 19 1/3/2019 Purpose Access and share local resources and information Hard and soft resources Access and share global resources and information Internet resources Messaging, Collaboration etc. (c) Copyright N Ganesan

A Note on Sharing and Collaboration Chapter 19 1/3/2019 A Note on Sharing and Collaboration Sharing One shares the application The other watches the changes being made Collaboration Both share the applications and both can make the changes (c) Copyright N Ganesan

Network Types Locally oriented (LAN) Globally oriented (WAN) Chapter 19 1/3/2019 Network Types Locally oriented (LAN) Globally oriented (WAN) A combination of the above two types (c) Copyright N Ganesan

A Simple Network Server Printer Peripheral Device (Modem) Chapter 19 1/3/2019 A Simple Network Server Printer Peripheral Device (Modem) Directly attached peripheral (Network Printer) Client Client (c) Copyright N Ganesan

Appliances Network appliance Internet appliance Chapter 19 1/3/2019 Appliances Network appliance Network Attached Storage (NAS) Network Printer Internet appliance (c) Copyright N Ganesan

NAS NAS can be directly attached to network (switch, for example) Chapter 19 1/3/2019 NAS NAS can be directly attached to network (switch, for example) NAS components Processor Embedded OS (Eg: Embedded Linux) Embedded software (Eg: SAMBA Server) (c) Copyright N Ganesan

Sample Components of a Simple Network Chapter 19 1/3/2019 Sample Components of a Simple Network Network Hardware Network Software Resources Hard resources Soft resources Personnel Administrators Users (c) Copyright N Ganesan

Hardware Servers Clients Peripheral devices Media (Cabling) Chapter 19 1/3/2019 Hardware Servers Clients Peripheral devices Network printers NAS Media (Cabling) Twisted pair, coaxial cable, optical fiber etc. Wireless networks without cables Networking Devices Hubs, switches, routers (c) Copyright N Ganesan

Media CAT 5 CAT 5e CAT 6 100 Mbps LANs 1000 Mbps LANs Chapter 19 1/3/2019 Media CAT 5 100 Mbps LANs CAT 5e 1000 Mbps LANs CAT 6 (c) Copyright N Ganesan

Internetworking Devices Chapter 19 1/3/2019 Internetworking Devices Hub Simply shares the electrical connection Switch Switches the data packet based on MAC address Bridge Router Routes the data packet based on the IP address (c) Copyright N Ganesan

Software Network operating system Client operating system Chapter 19 1/3/2019 Software Network operating system Windows 2003 Server, Windows Server 2000, Linux etc. Client operating system Windows XP, Windows 2000, Linux etc. Various application server operating systems SQL server, Web server, FTP server etc. (c) Copyright N Ganesan

Resources Hard resources Soft resources Printers, scanners etc. Chapter 19 1/3/2019 Resources Hard resources Printers, scanners etc. Soft resources Folder, application etc. (c) Copyright N Ganesan

Hard Resource Sharing Example Chapter 19 1/3/2019 Hard Resource Sharing Example Printer (Attached directly or to the Server) Print Server Print Queue Print Jobs Print Jobs (c) Copyright N Ganesan

Soft Resource Sharing (File Server) Example Chapter 19 1/3/2019 Soft Resource Sharing (File Server) Example Administrator Resource (Folder to be shared). Server Tariff Client Client User User User (c) Copyright N Ganesan

Application Server Example Chapter 19 1/3/2019 Application Server Example Database Administrator Sharing of SQL engine based application. Server with SQL engine and database. Client Client User User User (c) Copyright N Ganesan

Messaging Example Remote Internet Client E-mail Internet Gateway Chapter 19 Messaging Example 1/3/2019 Internet Remote Client E-mail Internet Gateway Client Messaging Server User E-mail Administrator (c) Copyright N Ganesan

Personnel Administrators Users Chapter 19 1/3/2019 Personnel Administrators Administrator, account operator, server backup operators etc. Users Local user, power user, global user etc. (c) Copyright N Ganesan

Network Administrator's Responsibilities Chapter 19 1/3/2019 Network Administrator's Responsibilities Install, manage and fine-tune the network resources Create and manage users Assign privileges to users to use the resources Sharing resources Accessing network applications Ensure LAN security (c) Copyright N Ganesan

Users Global users Local users Group of users Power users Chapter 19 1/3/2019 Users Global users Local users Group of users Power users Users with administrative privileges (c) Copyright N Ganesan

Earlier Windows Servers Chapter 19 1/3/2019 Earlier Windows Servers Windows NT Windows NT Workstation, Windows NT Server, Windows NT Enterprise Server Windows 2000 Windows 2000 Professional Windows 2000 Server Windows 2000 Advanced Server Windows 2000 Data Center Server (c) Copyright N Ganesan

Windows 2003 Server Versions Chapter 19 1/3/2019 Windows 2003 Server Versions Web Edition Standard Edition Enterprise Edition Datacenter Edition (c) Copyright N Ganesan

Network (Services) Servers Chapter 19 1/3/2019 Network (Services) Servers DHCP (Services) Server DNS (Services) Server Proxy (Services) Sever WINs (Services) server RAS (Services) Server Routing and Remote Access Server VPN (Services) Server Share Point services (c) Copyright N Ganesan

Application Servers SQL Server Web (Service) Server Chapter 19 1/3/2019 Application Servers SQL Server Web (Service) Server Media (Service) Server (c) Copyright N Ganesan

Major Network Architectures Chapter 19 1/3/2019 Major Network Architectures .Net J2EE (c) Copyright N Ganesan

Web Research Areas Directly attached network peripherals Chapter 19 1/3/2019 Web Research Areas Directly attached network peripherals Network printer, Network stand-alone hard drives (Snap) Network appliance and a web appliance Variations of the Windows Server 2003 operating system What is the .Net architecture ? (c) Copyright N Ganesan

Key Words Hard and soft resources Client operating systems Chapter 19 1/3/2019 Key Words Hard and soft resources Client operating systems Windows 9x, Windows NT, Windows 2000 Professional, Windows XP, Linux, OS/2, Mac OS X Server operating systems Windows NT Server, Windows 2000 Server, Windows 2003, Novell NetWare, Unix, Linux, OS/2 Warp (c) Copyright N Ganesan

Further Keywords Sharing of printers Symmetric Multi Processing (SMP) Chapter 19 1/3/2019 Further Keywords Sharing of printers local printer shared printer network printer Symmetric Multi Processing (SMP) Clustering Load balancing (c) Copyright N Ganesan

Chapter 19 1/3/2019 END OF MODULE (c) Copyright N Ganesan

Chapter 19 1/3/2019 END OF CHAPTER (c) Copyright N Ganesan