© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.0 Living in a Network Centric World Network Fundamentals – Chapter 1

2 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public What we will Learn from chapter 1?  How networks impact daily lives.  The role of data networking in the human network.  The key components data network.  Identify the opportunities and challenges from converged networks.  About network architectures: fault tolerance, scalability quality of service security.

3 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Benefits of instantaneous communication  How it supports and improves our lives

4 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life Describe purpose of communication media: IM, Wikis, Blogs, Podcasting, and Collaboration Tools –Instant messaging Real time communication based on typed text –Weblogs (Blogs) Web pages Podcasting audio files available for downloading

5 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Information networks used to improve teaching and learning

6 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life Communication over networks change the way we work

7 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Network support the way we play

8 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Characteristics of communication –Rules/agreements are established –Information may need to be repeated –Communication modes may impact the effectiveness of getting the message across

9 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges The role of data networks in communications

10 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Elements that make up a network –Devices To communicate with one another –Medium Connects devices together –Messages Information over media –Rules Govern how messages flow across networks

11 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Describe the role of converged networks –Converged network Carry data, voice, video & images over the same network

12 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Four characteristics addressed by network architecture design –Fault tolerance –Scalability –Quality of service –Security

13 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics How packet switching helps improve the resiliency and fault tolerance of the Internet architecture

14 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Scaling networks to meet user demand –Hierarchical –Common standards –Common protocols

15 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics Quality of Service factors and the mechanisms to ensure QoS.

16 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics Describe how QoS works.

17 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Select the appropriate QoS strategy for a given type of traffic

18 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics Why secure networks

19 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Measures used to secure data networks –Ensure confidentiality User authentication Data encryption –Maintain communication integrity Digital signatures –Ensure availability Firewalls Redundant network architecture Networks without a single point of failure

20 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public IRC Clients and Wiki Server  Install and use IRC clients and a Wiki server

21 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Summary

22 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public What did I Learn from chapter 2?  How networks impact daily lives.  The role of data networking in the human network.  The key components data network.  Identify the opportunities and challenges from converged networks.  About network architectures: fault tolerance, scalability quality of service security.

23 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Living in a Network Centric World Next Communicating over the Network