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

2 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Objectives  How networks impact daily life  Role of data networking in the human network  Key components of any data network  Opportunities and challenges of converged networks  Characteristics of network architectures: fault tolerance scalability quality of service security  Installing and using IRC clients and a Wiki server

3 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Benefits of instantaneous communication

4 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Characteristics and purpose of communication media –Instant messaging Real time communication between 2 or more people based on typed text –Weblogs (Blogs) Web pages created by an individual –Podcasting Website that contains audio files available for downloading

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

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

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

8 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Networking: Role, Components, and Challenges  Characteristics of communication –Rules or agreements are 1 st established –Important information may need to be repeated –Modes of communication are important

9 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Networking: Role, Components, and Challenges  Elements of a network –Devices Communicate with each other –Medium Connects devices together –Messages Information –Rules How messages flow

10 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Networking: Role, Components, and Challenges Converged networks in communications Converged network: A network that can carry voice video data over the same network

11 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics Four characteristics of network architecture design –Fault tolerance –Scalability –Quality of service –Security

12 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Packet switching

13 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Characteristics of the Internet –Hierarchical –Common standards –Common protocols

14 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Quality of Service

15 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  QoS mechanisms

16 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  QoS strategies

17 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Networks must be secure

18 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Measures to secure data networks –Ensure confidentiality through User authentication Data encryption –Maintain communication integrity through use of Digital signatures –Ensure availability through use of Firewalls Redundant network architecture Hardware without a single point of failure

19 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public IRC Clients and Wiki Server  Install and use IRC clients and a Wiki server

20 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Summary

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