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CHAPTER Network Hardware

CHAPTER Network Hardware. Chapter Objectives. Describe the important basic network hardware and the internetworking hardware Discuss the desired characteristics of a server and a workstation Present different switching technologies Examine the routing process with the help of an example.

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CHAPTER Network Hardware

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  1. CHAPTER Network Hardware

  2. Chapter Objectives • Describe the important basic network hardware and the internetworking hardware • Discuss the desired characteristics of a server and a workstation • Present different switching technologies • Examine the routing process with the help of an example

  3. END OF MODULE

  4. Web Research • Photonic switching • www.agilent.com/comms/photonicswitch • www.cnn.com/tech

  5. MODULE Server and Workstation Hardware

  6. Module Objectives • Give an overview of the different types of the server hardware • Discuss the desired characteristics of a server • Provide a specification for a workstation

  7. Servers • Backbone of a network • Types • Powerful micros • Servers • Super-servers • Sometimes mini-computers are used as servers • In a client-server, the server also acts as an engine of database execution • In general, it is used for the sharing of stored data and application

  8. Desired Characteristics of Server: Processor and Storage Requirement • Powerful processor • Latest Pentium Processor • Multiple processors, if appropriate • Large storage space • Several gigabytes at a minimum • Actual requirement will vary LAN size • Fast disk access speed • Less than 10 ms

  9. Desired Characteristics of a Server: CD-ROM • Fast CD-ROM drives • CD-ROM towers are often preferred

  10. Desired Characteristics of Server: Storage Technology • Better hard disk technology • SCSI • Fast access • Daisy chaining of devices • Latest SCSI technology is required • Possible consideration given to fiber-channel in the future

  11. Desired Characteristics of Server: Bus and Memory Technologies • Better bus technology • PCI • Memory • In excess of 128 Mbytes • SDRAM or similar memory technology functioning at 10 nanoseconds or less • The 168-pin SDRAM is also known as the DIMM chips as opposed to the 72-pin SIMM chips

  12. Desired Characteristics of Server: Reliability • Good back-up facilities • Back-up tape • Uniterruptible Power Supply (UPS)

  13. Fault Tolerant Feature for Servers • RAID storage technology • A system based on multiple disk • Hot-swappable disks • Redundant power supply • Hot-swappable power supply

  14. Workstation • Most applications are executed at the workstation • Therefore, it must be powerful in terms of the processor and the memory • As a rule of thumb, the workstation must be as powerful as it were to be used as a standalone unit to run the applications

  15. Workstation Processor and Memory • Powerful processor • Pentium class processor • Adequate memory • 32 Mbytes or more • DIMM preferred although fast EDO SIMM may also be used

  16. Workstation Storage and Compatibility • Sufficient storage • Storage in gigabytes • Important in a client-server environment • Front-end tools are stored on the workstation • Speed of storage • Ultra DMA or SCSI preferred • EIDE may also be used • Hardware components with appropriate drivers for the client operating system

  17. Reliability • Power surge protector • Uninterruptible Power Supply (UPS), for critical applications

  18. MODULE Server Selection

  19. 10 Users Source: PC Magazine, Nov. 7, 2000

  20. 25 to 50 Users Source: PC Magazine, Nov. 7, 2000

  21. 100 to 250 Users Source: PC Magazine, Nov. 7, 2000

  22. 500 to 1000 Users Source: PC Magazine, Nov. 7, 2000

  23. 1000+ Users Source: PC Magazine, Nov. 7, 2000

  24. Server Performance in Web Page Requests Per Second

  25. Server Performance in Megabits Per Second

  26. Server Performance in Transactions Per Second

  27. Page Requests: Single Vs. Dual

  28. Throughput: Single Vs. Dual

  29. Transactions: Single Vs. Dual

  30. END OF MODULE

  31. END OF MODULE

  32. END OF MODULE END OF CHAPTER

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