1.
Networking in the
Enterprise
Introducing Routing and Switching in the Enterprise –
Chapter 1
Version 4.0 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1

2.
Objectives
 Describe the logical architecture and components of
an enterprise network
 Explain the types of applications and traffic flows
present on an enterprise network
 Examine how enterprises integrate remote workers
into their networks
– Define the role and importance of a telecommuter
– Describe the function and importance of VPNs
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2

3.
Describe an Enterprise Network
 A large business environment with many users and
locations
 Supported by an enterprise network
 Provides mission-critical services and applications
 Requires centralized control: NOC
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3

4.
Describe an Enterprise Network
 Network infrastructure
 99.999% uptime
 High-end equipment
 Fail-over capabilities
 Redundancy
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4

5.
Describe an Enterprise Network
 Hierarchical design
 Access, Distribution, Core layers
 Enterprise networks contain both LAN and WAN
technologies
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5

6.
Describe an Enterprise Network
Intranet Extranet
 Provide access to local and  Privileged access for business
remote employees partners
 Private network  Private network
 Controlled by firewalls  Controlled access
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6

7.
Explain Types of Applications and Traffic
Flows within an Enterprise Network
 Local
 WAN
 External
 Optimized bandwidth
 Security
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7

8.
Explain Types of Applications and Traffic
Flows within an Enterprise Network
 Characteristics of different types of network traffic
 Network traffic prioritization
Classification
Pre-queuing
Queuing and scheduling
Post-queuing
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8

9.
Explain Types of Applications and Traffic
Flows within an Enterprise Network
 Factors affecting enterprise traffic
 Latency
 Jitter
 Quality of Service (QoS)
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9

10.
Examine How Enterprises Integrate Remote
Workers into their Networks
 Teleworking
 Telecommuting
 Teleconferencing
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10

11.
Examine How Enterprises Integrate Remote
Workers into their Networks
 Describe remote worker applications
 VoIP
 Sharing applications
 FTP and Telnet
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11

12.
Examine How Enterprises Integrate Remote
Workers into their Networks
 Function and importance of VPNs
 Encryption of traffic
 Tunnels
 Client/server application
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12

13.
Summary
 Enterprise networks support mission critical services
and traffic
 Enterprise design includes a campus, enterprise edge,
and service provider edge
 Intranets and extranets are private networks designed
for specific access privileges
 VPNs create encrypted tunnels for use by teleworkers
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13

14.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14