Client Server Applications by Lynne Miller

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Client / Server Applications by Lynne Miller

• What does this mean?
• Is this a totally new idea?
• Is this beyond you?

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National Bank of ASU

• Can you break into this vault?
• How much money do you have in here?
• Who has access to your money?

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National Bank of ASU

• User Name
• Password

• Online Banking
• Investments
• Lending
• Insurance

This is a Client / Server Application
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What is a client / server application?

• A computer architecture involving a client
  computer requesting services and a server
  computer that processes and provides the services
  or response to the client.
• Client and server are usually separate devices
  (computers) each designed to perform a specific
  function often in totally different places.

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Set up options

• A server could be placed within a library serving
  all computers in the library.
• A server could be placed in a system office
  serving all computers and schools within a
  system.
• A server could be placed in a different state and
  a client could send requests online.
• A separate server could be used for one thing
  such as e-mail.

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Two / Three Tier Architecture

• There may be a two tier architecture where
  teachers and students use the client computers
  and there is a different computer that is set up
  to be the server.
• There may be a three tier architecture where
  teachers and students use the client computers,
  the school has a server that requests travel thru
  to get to an additional server elsewhere with
  additional resources.

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Example of Server

• I log in at school each morning.
• As my computer comes up it connects me with two
  servers
• 1 SIMS Novell Server
• 2 NT Server for e-mail, attendance and
  discipline programs, internet, etc.

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Using client / server applications

• I do SIMS on the SIMS Novell Server
• I check e-mail on the NT Server
• I go online to ASU on the NT
• ASUs website is on their server
• I go to school website on the NT
• I go to my bank website on the NT
• And get on the banks server

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Client / Server Applications in the Media Center

• Uses
• Catalog listing of resources
• Availability info is accessible
• Research listings
• Information Sources
• Check In / Check Out

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Client / Server Applications in the Media Center

• Issues
• Security
• Who has access?
• What do they have access to?
• Access
• Must be established and controlled by IT.
• Cost
• Tech Support
• Knowledge pool

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Client / Server Applications in the Media Center

• Advantages
• Added resources without cost because you access
  online
• Some access controls possible
• Maintain and provide access to library collection
  info
• Limitless possibilities for future
• Servers can be added, upgraded, or replaced as
  needed

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Client / Server Applications in the Media Center

• Disadvantages
• Cost
• Initial set up
• Lack of availability of programs
• Are the programs desired available?
• Limitations of capacity
• May have to upgrade periodically
• Maintenance of system
• Knowledge pool IT training

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Conclusion

• Client / Server software architecture is
  versatile and is intended to improve usability,
  flexibility, and operations.
• Allows purchase of necessary programs while
  providing others through server connections
  online.
• Allows many computers to attach to a server and
  use unlimited resources at the same time.