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CHAPTER Introduction to LANs. MODULE. Purpose and Use of a Network. 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. Purpose.

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module

MODULE

Purpose and Use of a Network

definition of a network
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.
purpose
Purpose
  • Access and share local resources and information
    • Hard and soft resources
  • Access and share global resources and information
    • Internet resources
  • Messaging, Collaboration etc.
a note on sharing and collaboration
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
network types
Network Types
  • Locally oriented (LAN)
  • Globally oriented (WAN)
  • A combination of the above two types
a simple network
A Simple Network

Server

Printer

Peripheral Device

(Modem)

Directly attached

peripheral (Network

Printer)

Client

Client

appliances
Appliances
  • Network appliance
    • Network Attached Storage (NAS)
    • Network Printer
  • Internet appliance
slide9
NAS
  • NAS can be directly attached to network (switch, for example)
  • NAS components
    • Processor
    • Embedded OS (Eg: Embedded Linux)
    • Embedded software (Eg: SAMBA Server)
sample components of a simple network
Sample Components of a Simple Network
  • Network Hardware
  • Network Software
  • Resources
    • Hard resources
    • Soft resources
  • Personnel
    • Administrators
    • Users
hardware
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
media
Media
  • CAT 5
    • 100 Mbps LANs
  • CAT 5e
    • 1000 Mbps LANs
  • CAT 6
internetworking devices
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
software
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.
resources
Resources
  • Hard resources
    • Printers, scanners etc.
  • Soft resources
    • Folder, application etc.
hard resource sharing example
Hard Resource Sharing Example

Printer

(Attached directly or to the Server)

Print Server

Print Queue

Print Jobs

Print Jobs

soft resource sharing file server example
Soft Resource Sharing (File Server) Example

Administrator

Resource (Folder to be shared).

Server

Tariff

Client

Client

User

User

User

application server example
Application Server Example

Database

Administrator

Sharing of

SQL engine based application.

Server with SQL

engine and database.

Client

Client

User

User

User

messaging example
Messaging Example

Internet

Remote

Client

E-mail

Internet Gateway

Client

Messaging

Server

User

E-mail

Administrator

personnel
Personnel
  • Administrators
    • Administrator, account operator, server backup operators etc.
  • Users
    • Local user, power user, global user etc.
network administrator s responsibilities
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
users
Users
  • Global users
  • Local users
  • Group of users
  • Power users
  • Users with administrative privileges
earlier windows servers
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
windows 2003 server versions
Windows 2003 Server Versions
  • Web Edition
  • Standard Edition
  • Enterprise Edition
  • Datacenter Edition
network services servers
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
application servers
Application Servers
  • SQL Server
  • Web (Service) Server
  • Media (Service) Server
web research areas
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 ?
key words
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
further keywords
Further Keywords
  • Sharing of printers
    • local printer
    • shared printer
    • network printer
  • Symmetric Multi Processing (SMP)
  • Clustering
    • Load balancing