© 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 Objectives  Describe how networks impact our daily lives.  Describe the role of data networking in the human network.  Identify the key components of any data network.  Identify the opportunities and challenges posed by converged networks.  Describe the characteristics of network architectures: fault tolerance, scalability, quality of service and security.

3 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  How does instantaneous communication support and improves our lives?  (what we wear, how we travel, how we pay bills, obtain information from health to cooking, downloading files, sharing photos, etc.)

4 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe the characteristics and purpose of popular communication media such as, IM, Wikis, Blogs, Podcasting, and Collaboration Tools –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 –Wikis web pages that groups of people can edit and view together.

5 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Explain ways that using information networks to share and collaborate improves teaching and learning (e- learning)

6 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe ways communication over a network changes the way we work

7 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Work Collaboration Tools  Intranets – private networks used by ONE company..employees WITHIN the company have access to it  Extranets – provides suppliers, vendors, and/or customers limited access to corporate data  There are many ways to use technology even in businesses that aren’t traditionally technology oriented (Ex. Farming)  There are more telecommuters today than ever before.

8 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe ways communication over a network supports the way we play (travel, listening to music, watching movies/videos, reading books, watching sporting events, etc.)

9 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Basic characteristics of communication –Rules or agreements are 1 st established (who, methods, common language, timing, confirmation) –Important information may need to be repeated –Various modes of communication may impact the effectiveness of getting the message across

10 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Quality of communication is affected by lots of things.. Quality of the pathway, # times it has to be re-directed, load, size, message, and complexity of the message, etc.

11 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe the various elements that make up a network –Devices These are used to communicate with one another –Medium This is how the devices are connected together –Messages Information that travels over the medium –Rules Governs how messages flow across network

12 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Devices on a network (See for icons or pg. 13 in your textbook)  Switch  Firewall  Router  Wireless router  Cloud  Links (serial, wireless, etc.)

13 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Types of media  For communication to take place, there has to be a connection - UTP STP Optical cable (fiber) Atmosphere Coaxial (cable TV)

14 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Protocols  There must be rules to govern communication: HTTP SMTP SNMP FTP TFTP POP TCP/IP

15 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe the role of converged networks in communications –Converged network A type of network that can carry voice, video & data over the same network

16 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Explain four characteristics that are addressed by network architecture design –Fault tolerance – limits impact of failure/recovers quickly –Scalability – expands easily –Quality of service – equal to in person –Security

17 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe how packet switching helps improve the resiliency and fault tolerance of the Internet architecture

18 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe characteristics of the Internet that help it scale to meet user demand –Hierarchical –Common standards –Common protocols

19 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Constraints of resources (media, bandwidth, technology, etc.) affect the Qos (mechanisms that manage congested network traffic.)

20 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Explain the factors that necessitate Quality of Service and the mechanisms necessary to ensure it

21 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe how to select the appropriate QoS strategy for a given type of traffic

22 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Why should networks be secure? (lack of trust, confidentiality, loss of sales,etc.)  Physical security  Content security

23 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Describe basic measures to secure data networks –Ensure confidentiality through use of 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

24 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Now What?  Ch. 1 Test – Wed. Aug 29 or Thurs, Aug. 30, 2012  Skills Integration Challenge in your lab book on pg. 28 will be done right now together.  Study Guide – Due Today! Pg. 3-4– Vocabulary Exercise: Identify Vocabulary Ex: Matching Pg. 5-6– Vocabulary Ex: Define Pg. 8-9 – Multiple Choice Questions