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

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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

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

20. 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

21. 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

22. 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

23. 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

24. 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

25. 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

26. 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

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

28. 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

29. 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

30. 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

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

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