Introduction to LANs
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Introduction to Local Area Networks (LANs): Purpose, Components, and Sharing, Slides of Data Communication Systems and Computer Networks
An introduction to local area networks (lans), explaining their purpose, components, and various sharing methods. Topics include the definition of a network, network types, network hardware and software, resource sharing, and network personnel. The document also covers network administrator responsibilities and various server versions.
Typology: Slides
2013/2014
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Introduction to LANs
MODULE
Purpose and Use of a Network
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
- Sharing
- One shares the application
- The other watches the changes being made
- Collaboration
- Both share the applications and both can make the changes
A Simple Network Client Client Server Peripheral Device (Modem) Printer Directly attached peripheral (Network Printer)
Appliances
- Network appliance
- Network Attached Storage (NAS)
- Network Printer
- Internet appliance
Sample Components of a Simple Network
- Network Hardware
- Network Software
- Resources
- Hard resources
- Soft resources
- Personnel
- Administrators
- Users
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
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
- 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.
Hard Resource Sharing Example Printer (Attached directly or to the Server) Print Jobs Print Jobs Print Server Print Queue
Soft Resource Sharing (File Server) Example Server Client Client Tariff Resource (Folder to be shared). User User User Administrator
Messaging Example Remote Client Messaging Server Client User Administrator Internet Internet Gateway E-mail E-mail
Personnel
- Administrators
- Administrator, account operator, server backup operators etc.
- Users
- Local user, power user, global user etc.