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Services in a Converged

WAN

Accessing the WAN

Chapter 1

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Objectives

Describe how the Cisco Enterprise CompositeModel (ECNM) provides integrated servicesover an Enterprise network.

Describe the key WAN technology concepts. Identify the appropriate WAN technologies to

use when matching ECNM best practices withtypical enterprise requirements for WAN

communications.

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Describe How ECNM Provides IntegratedServices over an Enterprise Network

Explain the purpose and function of WANs

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Describe How ECNM Provides IntegratedServices over an Enterprise Network

Describe the stages of business growth, thecorresponding business requirements for services andhow those requirements are reflected in theEnterprises changing network topology

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Describe How ECNM Provides IntegratedServices over an Enterprise Network

Describe the problems with the Hierarchical DesignModel that Cisco's Enterprise Composite Model hasbeen designed to address

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Describe How ECNM Provides IntegratedServices over an Enterprise Network

Explain the purpose of Cisco Enterprise Architectures

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Describe the Key WAN TechnologyConcepts

Describe WAN functions in terms of the OSI ReferenceModel

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Describe the Key WAN TechnologyConcepts

Describe the key WAN physical layer concepts fornetwork and Internet communications

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Describe the Key WAN TechnologyConcepts

Describe the key WAN data link layer protocols used intodays Enterprise WAN networks

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Describe the Key WAN TechnologyConcepts

Describe the switching technologies used for WANs inan Enterprise setting

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Select the Appropriate WAN Technology to meetECNM Requirements

List the various options for connecting subscribers tothe WAN

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Select the Appropriate WAN Technology to meetECNM Requirements

Describe how Enterprises use leased line services toprovide a WAN connection

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Select the Appropriate WAN Technology to meetECNM Requirements

Describe the circuit switching options available toprovide a WAN connection

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Select the Appropriate WAN Technology to meetECNM Requirements

Describe the packet switching options available toprovide a WAN connection

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Select the Appropriate WAN Technology to meetECNM Requirements

List factors to consider when selecting a WANconnection

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Summary

A WAN is defined asA data communications network that operates beyond thegeographic 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

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Summary

Cisco Enterprise Architecture

This is an expansion of the hierarchical model that furtherdivides the enterprise network into

Physical areas

Logical areas

Functional areas Selecting the appropriate WAN technology requires

considering some of the following:

WANs purpose

Geographic scope of WANTraffic requirements

If WAN uses a public or private infrastructure

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