Transcript Cisco Presentation Guide

CCNA 4 v3.0 Module 2
WAN Technologies
© 2003, Cisco Systems, Inc. All rights reserved.
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Purpose of This PowerPoint
• This PowerPoint primarily consists of the Target
Indicators (TIs) of this module in CCNA version
3.0.
• It was created to give instructors a PowerPoint to
take and modify as their own.
• This PowerPoint is:
NOT a study guide for the module final assessment.
NOT a study guide for the CCNA certification exam.
• Please report any mistakes you find in this
PowerPoint by using the Academy Connection
Help link.
© 2003, Cisco Systems, Inc. All rights reserved.
2
To Locate Instructional Resource
Materials on Academy Connection:
• Go to the Community FTP Center to locate
materials created by the instructor community
• Go to the Tools section
• Go to the Alpha Preview section
• Go to the Community link under Resources
• See the resources available on the Class home
page for classes you are offering
• Search http://www.cisco.com
• Contact your parent academy!
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Objectives
• WAN Technologies Overview
• WAN Technologies
• WAN Design
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WAN Technology
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WAN Service Providers
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Physical Layer: WANs
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WAN Line Types and Bandwidth
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WAN Devices
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CSU/DSU
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Modem Transmission
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WAN Standards
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WAN Encapsulation
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WAN Data-Link Protocols
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Circuit Switching
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Packet Switching
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WAN Link Options
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Analog Dialup
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ISDN
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ISDN
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Leased Line
• Leased lines are not only used to provide direct
point-to-point connections between Enterprise
LANS, they can also be used to connect
individual branches to a packet switched
network.
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WAN with X.25
• X.25 provides a low bit rate,
shared-variable capacity that
may either be switched or
permanent
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Frame Relay
• Most Frame Relay connections are based on
PVCs rather than SVCs. It implements no error
or flow control. Frame Relay provides permanent
shared medium bandwidth connectivity that
carries both voice and data traffic.
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ATM
• Asynchronous Transfer Mode (ATM) is a
technology capable of transferring voice, video,
and data through private and public networks. It
is built on a cell based architecture rather than
on a frame-based architecture.
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DSL
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ADSL Technology
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Cable Modem
• Enhanced Cable Modems enable twoway. High speed data transmissions
using the same coaxial lines that
transmit cable television.
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Cable Data Network Architecture
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Modern WAN
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Comparing WAN Traffic Types
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Steps In WAN Design
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Star Topology
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Full-Mesh Topology
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Partial-Mesh Topology
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Three-Layer Design Model
• The links connecting the various sites in an
area that provide access to the enterprise
network are called the access links or
access layer of the WAN.
• Traffic between areas is distributed by the
distribution links, and is moved onto the
core links for transfer to other regions,
when necessary.
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Internet for WAN Connectivity
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One-Layer Hierarchy
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