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Services in a Converged WAN

Services in a Converged WAN. Accessing the WAN – Chapter 1. Objectives. Describe how the Cisco Enterprise Composite Model (ECNM) provides integrated services over an Enterprise network. Describe the key WAN technology concepts.

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Services in a Converged WAN

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  1. Services in a Converged WAN Accessing the WAN– Chapter 1

  2. Objectives • Describe how the Cisco Enterprise Composite Model (ECNM) provides integrated services over an Enterprise network. • Describe the key WAN technology concepts. • Identify the appropriate WAN technologies to use when matching ECNM best practices with typical enterprise requirements for WAN communications.

  3. 1.1 Providing Integrated Services to the Enterprise Accessing the WAN– Chapter 1

  4. The purpose and function of WANs

  5. The Evolving Enterprise Network

  6. The Hierarchical Design Model Access layer - Grants user access to network devices. Distribution layer - aggregates WAN connections at the edge of the campus and provides policy-based connectivity. Core layer - high-speed backbone that is designed to switch packets as fast as possible.

  7. The Enterprise Architecture Different businesses need different types of networks. Some examples of the modules: Enterprise Campus Architecture Enterprise Branch Architecture Enterprise Data Center Architecture Enterprise Teleworker Architecture

  8. Modules in the Enterprise Architecture The Cisco Enterprise Architecture consists of modules representing focused views that target each place in the network. Each module has a distinct network infrastructure with services and network applications that extend across the modules.

  9. Example topology

  10. 1.2 WAN technology overview Accessing the WAN– Chapter 1

  11. Describe the Key WAN Technology Concepts WAN operations focus primarily on Layer 1 and Layer 2.

  12. WAN Physical Layer Terminology • Customer Premises Equipment • Data Communications Equipment • Data Terminal Equipment • Demarcation Point

  13. WAN Devices

  14. WAN Physical Layer Standards

  15. WAN Data Link Layer Standards

  16. WAN Frame Encapsulation Formats

  17. Circuit Switching

  18. Packet Switching

  19. 1.3 Internet Connection Options Accessing the WAN– Chapter 1

  20. Various options for connecting subscribers to the WAN

  21. Leased line

  22. Circuit switching options

  23. Packet switching options X25 Frame Relay ATM

  24. Broadband Services • ADSL • Cable • Wireless (WiMax)

  25. VPN Technology

  26. Metro Ethernet

  27. Factors to consider when selecting a WAN connection

  28. Factors to consider when selecting a WAN connection (cont.)

  29. Summary • A WAN is defined as • A data communications network that operates beyond the geographic scope of a LAN • WAN primarily operate on layer 1 & 2 of the OSI model • WAN technologies include • Leased line • ISDN • Frame relay • X.25 • ATM

  30. Summary • Cisco Enterprise Architecture • This is an expansion of the hierarchical model that further divides the enterprise network into • Physical areas • Logical areas • Functional areas • Selecting the appropriate WAN technology requires considering some of the following: • WAN’s purpose • Geographic scope of WAN • Traffic requirements • If WAN uses a public or private infrastructure

  31. Next Module

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