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Enabling Technologies (Chapter 1)

Enabling Technologies (Chapter 1). Understand the technology and importance of: Virtualization Cloud Computing WAN Acceleration Deep Packet Inspection Media - fiber & copper cabling. Protocols. A protocol is a set of rules for communicating between computers. Why are they needed?

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Enabling Technologies (Chapter 1)

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  1. Enabling Technologies(Chapter 1) Understand the technology and importance of: Virtualization Cloud Computing WAN Acceleration Deep Packet Inspection Media - fiber & copper cabling

  2. Protocols • A protocol is a set of rules for communicating between computers. • Why are they needed? • Who goes first? • Are you ready? • I got your message • There are errors

  3. Internet Compression; No Impact on Speed • The use of sophisticated algorithms (mathematical formulas) to shrink the amount of data sent over networks or stored on computers. • How does compression make networks more efficient? • Examples of applications that use compression?

  4. Multiplexing • Multiplexing makes networks more efficientby combining multiple streams of data onto a single medium • What are examples? • Why is this important? • How is multiplexing different than compression?

  5. Server Virtualization Server virtualization Virtualization software within the server manages traffic into and out of the host server allocates the server’s resources including memory, computing and hard drive capacity to applications • single servers with functions and features of multiple servers • Within each physical server, each application is a “virtual machine”

  6. Virtualized Servers With Operating Systems Virtual machines Apps OS Apps OS Apps OS Apps OS Apps OS Apps OS Apps OS Apps OS Virtual machine operating systems VM OS VM OS VM OS Physical servers

  7. Cloud Computing • Computing, storage, applications and parts or all of data centers at a provider’s site • Cloud computing enablers • High capacity networks • Virtualization Service provider’s data center accessed via the Internet

  8. Rationale for Cloud Computing • For enterprises savings on: • Cooling • Space • Testing new applications • IT staffing • Application development • Enterprise reluctance • Consumer caution

  9. WAN Acceleration and Optimization • Wide Area Network (WAN) Acceleration makes networks more efficient by: • Overcoming delays caused by “chatty” protocols • Using compression • Enterprises, hospitals and universities use WAN acceleration: • Between their sites • To improve response times in their networks

  10. WAN Acceleration Overview

  11. Deep Packet Inspection DPI switch At carrier data center Carrier Network Mobile customer • Track messages • Monitor and manage congestion • Calculate bits transmitted monthly • Block access to sites • Slow down certain traffic • Give priority to other traffic Landline Customer

  12. Media • What are my choices? • What are the criteria for selection? • Implication of choices

  13. Copper Cable • Cross Section of Category 6 Cabling

  14. Fiber Applications and Characteristics • Characteristics • Capacity • Electrical immunity • Security • Durability • Size • Weight • Flexibility • Material & labor costs • Applications • Backbones • Submarine cabling • Riser cabling between floors • Connections between buildings in a campus

  15. Open Systems Interconnect Model (OSI) • Layer 1: Physical Layer • Media type (copper, fiber, etc.); Repeaters, amplifiers • Layer 2: Data Link Layer • Frames; MAC addresses; Ethernet, Frame Relay, ATM • Layer 3: Network Layer • Routing/Addressing; Packets; TCP/IP • Layer 4: Transport Layer • Content switching; TCP, UDP; Voice, data, video priority; Filter content • Layer 5: Session Layer • H.323 voice/video sessions; encryption • Layer 6: Presentation Layer • Format for presentation to screen; HTML • Layer 7: Application Layer • File services, print services: HTTP

  16. Summary • Why are the following important: • Virtualization • Cloud computing • Compression and multiplexing • WAN acceleration & optimization • Deep Packet Inspection • How do fiber cabling and unshielded twisted pair differ from each other? • Where are they each used?

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