More Related Content
Similar to CCNA Discovery 4 - Chapter 5
Similar to CCNA Discovery 4 - Chapter 5 (20)
More from Irsandi Hasan (20)
CCNA Discovery 4 - Chapter 5
- 1. Creating the Network
Design
Designing and Supporting Computer Networks – Chapter 5
Version 4.0 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1
- 2. Objectives
Analyze business goals and application requirements
to determine what factors affect the network design
Utilize the hierarchical design model to develop a
cost-effective network design that matches the
organization’s requirements
Select the appropriate WAN connectivity option to
meet the organization’s requirements
Incorporate wireless connectivity into the LAN design,
based on the results of the wireless survey
Incorporate security into the LAN/WAN design,
including placement of firewalls, IDS, and ACLs
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
- 3. Analyze Business Goals and Application
Requirements
List business goals that must be met by the new design
Decide which design elements must be present in the
final design
Explore alternatives to constraints
Make trade-offs
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
- 4. Analyze Business Goals and Application
Requirements
Strategies for scalability:
Access Layer modules
Expandable, modular equipment
Broadcast limitation
Multiple links
Localized VLANs
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
- 5. Analyze Business Goals and Application
Requirements
Availability requirements:
Affordable implementation, maximum protection from
failure
Availability for e-commerce
Security monitoring system
IP telephone system
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
- 6. Analyze Business Goals and Application
Requirements
Performance requirements:
Transaction-processing
Video distribution and monitoring
IP telephone voice quality
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
- 7. Analyze Business Goals and Application
Requirements
Security requirements:
Use of firewalls
VPNs
Intrusion prevention
systems
Endpoint security
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
- 8. Analyze Business Goals and Application
Requirements
Design trade-offs:
Accommodate business goals
Eliminate or complicate other improvements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
- 9. Utilize the Hierarchical Design Model to
Develop a Cost-Effective Network Design
Access Layer requirements:
Connectivity for existing devices and new devices
VLANs to separate voice, security, wireless, and
normal data services
Redundancy
QoS
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
- 10. Utilize the Hierarchical Design Model to
Develop a Cost-Effective Network Design
Capabilities of existing technology
Limitations of existing equipment
Power requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
- 11. Utilize the Hierarchical Design Model to
Develop a Cost-Effective Network Design
Distribution layer requirements:
Redundant components and links
High-density routing
Traffic filtering
QoS implementation
High-bandwidth connectivity
Fast convergence
Route summarization
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
- 12. Utilize the Hierarchical Design Model to
Develop a Cost-Effective Network Design
Core Layer requirements:
High-speed connectivity
Routed interconnections
High-speed redundant
links
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
- 13. Utilize the Hierarchical Design Model to
Develop a Cost-Effective Network Design
Create the logical LAN diagram, including the locations
of servers and services
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
- 14. Select the Appropriate WAN Connectivity
Option
Determine WAN services needed for remote sites
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
- 15. Select the Appropriate WAN Connectivity
Option
Select the appropriate WAN connectivity method and
identify the equipment required to support it
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
- 16. Select the Appropriate WAN Connectivity
Option
Backing up the Frame Relay link
Supporting remote workers
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
- 17. Select the Appropriate WAN Connectivity
Option
Evaluate IP addressing and routing methodologies for
WAN traffic based on company requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
- 18. Incorporate Wireless Connectivity into
the LAN Design
Identify the appropriate wireless equipment and
capabilities to meet specific design requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
- 19. Incorporate Wireless Connectivity into
the LAN Design
Integrating wired and wireless solutions:
Lightweight Access Points (LAPs)
Wireless LAN controllers
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19
- 20. Incorporate Wireless Connectivity into
the LAN Design
Factors influencing availability in a wireless network:
Location of the AP
Signal strength of the AP
Number of users
Dynamic reconfiguration
Centralization
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20
- 21. Incorporate Wireless Connectivity into
the LAN Design
Create an IP address scheme for a wireless LAN:
Layer 3 roaming
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21
- 22. Incorporate Security into the LAN/WAN
Design
Determine the source and nature of potential threats
Draw a diagram of the placement of security functions
and filters
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22
- 23. Incorporate Security into the LAN/WAN
Design
Primary categories of security services:
Infrastructure protection
Secure connectivity
Threat detection, defense, and mitigation
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23
- 24. Incorporate Security into the LAN/WAN
Design
Design and implement the appropriate access filters to
meet a specific network security requirement:
Firewall rule sets
Access control lists
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24
- 25. Incorporate Security into the LAN/WAN
Design
Include access control lists and firewall rules in the
design documentation:
Provide evidence that the security policy is
implemented
Ensure that when changes are made, existing rules are
known
Assist in troubleshooting
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 25
- 26. Summary
For each business goal, the designer determines what
network changes are necessary.
Converged networks carry a combination of data, voice,
and video traffic.
Designing WAN connectivity requires evaluation of the
telecommunications services available in the
customer’s area.
Unified wireless network solutions offer advanced
features.
The network designer must identify which data is at risk
and what the potential sources of attacks are.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 26
- 27. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 27