Services in a           Converged WAN           Accessing the WAN – Chapter 1ITE I Chapter 6   © 2006 Cisco Systems, Inc. ...
Objectives            Describe how the Cisco Enterprise Composite             Model (ECNM) provides integrated services  ...
1.1 Providing Integrated           Services to the Enterprise           Accessing the WAN – Chapter 1ITE I Chapter 6   © 2...
The purpose and function of WANsITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   4
The purpose and function of WANs            A WAN is a data communications network that             operates beyond the g...
The Evolving Enterprise Network                                                                                   •Network...
The Hierarchical Design ModelAccess layer - Grants user access to network devices.Distribution layer - aggregates WAN conn...
Cisco Enterprise Architecture    An architecture    developed by Cisco that    has relevance to the    different stages of...
Modules in the Enterprise Architecture          •Enterprise Campus Architecture - describes the recommended          metho...
1.2 WAN technology           overview           Accessing the WAN – Chapter 1ITE I Chapter 6   © 2006 Cisco Systems, Inc. ...
Describe the Key WAN Technology           Concepts          WAN operations focus primarily on Layer 1 and Layer 2.ITE 1 Ch...
WAN Physical Layer Terminology                                                                                    Custome...
WAN Physical Layer Terminology            Customer Premises Equipment - Devices and inside             wiring located at ...
WAN Physical Layer Terminology            Local loop - the copper or fiber telephone cable that             connects the ...
WAN DevicesITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   15
WAN Devices            Modem - Modulates an analog carrier signal to encode             digital information, and also dem...
WAN Devices            WAN switch - a multiport internetworking device used             in carrier networks; typically sw...
WAN Physical Layer StandardsITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   18
WAN Physical Layer Standards            EIA/TIA-232- allows signal speeds of up to 64 kbps on             a 25-pin D-conn...
WAN Physical Layer Standards            V.35 - the ITU-T standard for synchronous             communications between a ne...
WAN Data Link Layer StandardsITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   21
WAN Frame Encapsulation FormatsITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   22
Circuit Switching                                                                    Ex: ISDN and                         ...
Packet SwitchingITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   24
Packet Switching            Packet switching splits traffic data into packets that are             routed over a shared n...
1.3 Internet Connection Options           Accessing the WAN – Chapter 1ITE I Chapter 6   © 2006 Cisco Systems, Inc. All ri...
Various options for connecting subscribers to the WANITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   C...
Leased lineITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   28
Circuit switching optionsITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   29
Packet switching options                           X25                  Frame Relay                         ATMITE 1 Chapt...
Broadband Services  ADSL  Cable  Wireless (WiMax)ITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Ci...
VPN TechnologyITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   32
Metro EthernetITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   33
Factors to consider when selecting a WAN   connectionITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   C...
Factors to consider when selecting a WAN   connection (cont.)ITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reser...
Summary          A WAN is defined as                  A data communications network that operates beyond the             ...
Summary            Cisco Enterprise Architecture                   –This is an expansion of the hierarchical model that f...
Next ModuleITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   38
ITE 1 Chapter 6   © 2006 Cisco Systems, Inc. All rights reserved.   Cisco Public   39
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  • Graphic 1.1.1.1
  • Graphic 1.1.1.1
  • Graphic 1.1.2.1
  • Graphic 1.1.3.2
  • Graphic 1.1.3.3
  • Graphic 1.2.1.1
  • Graphic 1.2.2.1 If space permits add graphics 1.2.2.2 & 1.2.2.3 (if forced to make a choice between the 2 graphic pick 1.2.2.2)
  • Graphic 1.2.3.1
  • Graphic 1.2.4.1 Alternative graphic can be found at the following URL (not necessary to use – just a thought): http://www.cisco.com/image/jpg/en/us/guest/products/ps6438/c1244/cdccont_0900aecd802c2010_0900aecd802c2010-08.jpg graphic 1.2.4.2
  • Graphic 1.2.4.1 Alternative graphic can be found at the following URL (not necessary to use – just a thought): http://www.cisco.com/image/jpg/en/us/guest/products/ps6438/c1244/cdccont_0900aecd802c2010_0900aecd802c2010-08.jpg graphic 1.2.4.2
  • Graphic 1.3.1.1
  • Graphic 1.3.2.1
  • Graphics 1.3.3.1 & 1.3.3.2
  • Graphic 1.3.4.1
  • Graphic 1.3.4.1
  • Graphic 1.3.4.1
  • The objective stated above does not make sense to me. Reword the above objective as follows: List factors to consider when selecting a WAN connection Graphic 1.3.5.4
  • The objective stated above does not make sense to me. Reword the above objective as follows: List factors to consider when selecting a WAN connection Graphic 1.3.5.4
  • Chapter1 rev1.0

    1. 1. Services in a Converged WAN Accessing the WAN – Chapter 1ITE I Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1
    2. 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.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
    3. 3. 1.1 Providing Integrated Services to the Enterprise Accessing the WAN – Chapter 1ITE I Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
    4. 4. The purpose and function of WANsITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
    5. 5. The purpose and function of WANs  A WAN is a data communications network that operates beyond the geographic scope of a LAN. Characteristics include:  Connect devices that are separated by a broader geographical area than can be served by a LAN.  Use the services of carriers, such as telephone companies, cable companies, satellite systems, and network providers.  Use serial connections of various types to provide access to bandwidth over large geographic areas.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
    6. 6. The Evolving Enterprise Network •Network requirements of a company can change dramatically as the company grows over time.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
    7. 7. The Hierarchical Design ModelAccess layer - Grants user access to network devices.Distribution layer - aggregates WAN connections at theedge of the campus and provides policy-based connectivity.Core layer - high-speed backbone that is designed to switchpackets as fast as possible. ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
    8. 8. Cisco Enterprise Architecture An architecture developed by Cisco that has relevance to the different stages of growth of a business. 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.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
    9. 9. Modules in the Enterprise Architecture •Enterprise Campus Architecture - describes the recommended methods to create a scalable network, while addressing the needs of campus-style business operations. •Enterprise Edge Architecture - enables the enterprise to use Internet and partner resources, and provide resources for its customers. •Enterprise Branch Architecture - allows businesses to extend the applications and services found at the campus to remote locations and users or to a small group of branches. •Enterprise Data Center Architecture – manages and maintains centralized data systems for the entire enterprise •Enterprise Teleworker Architecture – connects individual employees to network resources remotely, typically from home.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
    10. 10. 1.2 WAN technology overview Accessing the WAN – Chapter 1ITE I Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
    11. 11. Describe the Key WAN Technology Concepts WAN operations focus primarily on Layer 1 and Layer 2.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
    12. 12. WAN Physical Layer Terminology  Customer Premises Equipment  Data Communications Equipment  Data Terminal Equipment  Demarcation PointITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
    13. 13. WAN Physical Layer Terminology  Customer Premises Equipment - Devices and inside wiring located at the premises of the subscriber and connected with a telecommunication channel of a carrier.  Data Communications Equipment - consists of devices that put data on the local loop  Data Terminal Equipment - customer devices that pass the data from a customer network or host computer for transmission over the WAN.  Demarcation Point - a point established in a building or complex to separate customer equipment from service provider equipment.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
    14. 14. WAN Physical Layer Terminology  Local loop - the copper or fiber telephone cable that connects the CPE at the subscriber site to the CO of the service provider; also called last mile  Central Office - a local service provider facility or building where local telephone cables link to long-haul, all-digital, fiber-optic communications lines through a system of switches and other equipment.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
    15. 15. WAN DevicesITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
    16. 16. WAN Devices  Modem - Modulates an analog carrier signal to encode digital information, and also demodulates the carrier signal to decode the transmitted information.  CSU/DSU- used on T1 and T3 lines; The CSU provides termination for the digital signal and ensures integrity through error correction. The DSU converts the T-carrier line frames into frames that the LAN can interpret.  Access Server - concentrates dial-in and dial-out user communications.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
    17. 17. WAN Devices  WAN switch - a multiport internetworking device used in carrier networks; typically switches traffic like Frame Relay, ATM, or X.25; operates at the data link layer of the OSI model  Modem - Modulates an analog carrier signal to encode digital information, and also demodulates the carrier signal to decode the transmitted information.  Router- provides internetworking and WAN access interface ports that are used to connect to the service provider network.  Core router-A router that resides within the middle or backbone of the WANITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
    18. 18. WAN Physical Layer StandardsITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
    19. 19. WAN Physical Layer Standards  EIA/TIA-232- allows signal speeds of up to 64 kbps on a 25-pin D-connector over short distances (RS232/V.24)  EIA/TIA-449/530 - a faster version of EIA/TIA-232. It uses a 36-pin D-connector and is capable of longer cable runs.  EIA/TIA-612/613 - Describes the High-Speed Serial Interface (HSSI) protocol, which provides access to services up to 52 Mb/s on a 60-pin D-connector.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19
    20. 20. WAN Physical Layer Standards  V.35 - the ITU-T standard for synchronous communications between a network access device and a packet network.  X.21 - an ITU-T standard for synchronous digital communications. It uses a 15-pin D-connector.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20
    21. 21. WAN Data Link Layer StandardsITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21
    22. 22. WAN Frame Encapsulation FormatsITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22
    23. 23. Circuit Switching Ex: ISDN and PSTN  A circuit-switched network is one that establishes a dedicated circuit between nodes and terminals before the users may communicate.  The internal path taken by the circuit between exchanges is shared by a number of conversations. Time division multiplexing (TDM) gives each conversation a share of the connection in turn.ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23
    24. 24. Packet SwitchingITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24
    25. 25. Packet Switching  Packet switching splits traffic data into packets that are routed over a shared network.  Packet-switching networks do not require a circuit to be established, and they allow many pairs of nodes to communicate over the same channel.  The switches in a packet-switched network determine which link the packet must be sent on next from the addressing information in each packet.  Packet-switched networks may establish routes through the switches for particular end-to-end connections called virtual circuits. A VC is a logical circuit created within a shared network between two network devices. Two types of VCs exist: PVC and SVC (more on Ch. 3)ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 25
    26. 26. 1.3 Internet Connection Options Accessing the WAN – Chapter 1ITE I Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 26
    27. 27. Various options for connecting subscribers to the WANITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 27
    28. 28. Leased lineITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 28
    29. 29. Circuit switching optionsITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 29
    30. 30. Packet switching options X25 Frame Relay ATMITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 30
    31. 31. Broadband Services  ADSL  Cable  Wireless (WiMax)ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 31
    32. 32. VPN TechnologyITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 32
    33. 33. Metro EthernetITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 33
    34. 34. Factors to consider when selecting a WAN connectionITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 34
    35. 35. Factors to consider when selecting a WAN connection (cont.)ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 35
    36. 36. 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 –ATMITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 36
    37. 37. 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 infrastructureITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 37
    38. 38. Next ModuleITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 38
    39. 39. ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 39

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