living in a network centric world

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1Version 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.


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.)


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.


Explain ways that using information networks to share and collaborate improves teaching and learning (e-learning)


Describe ways communication over a network changes the way we work


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.


Describe ways communication over a network supports the way we play (travel, listening to music, watching movies/videos, reading books, watching sporting events, etc.)


Data Networking Role, Components, and Challenges Basic characteristics of communication

– Rules or agreements are 1st 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


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.


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


Devices on a network (See 1.3.2.2 for icons or pg. 13 in your textbook) Switch

Firewall

Router

Wireless router

Cloud

Links (serial, wireless, etc.)


Types of media

For communication to take place, there has to be a connection -

UTPSTPOptical cable (fiber)AtmosphereCoaxial (cable TV)


Protocols

There must be rules to govern communication:HTTPSMTPSNMPFTPTFTPPOPTCP/IP


Describe the role of converged networks in communications

– Converged network• A type of network that can carry voice, video & data over

the same network


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


Describe how packet switching helps improve the resiliency and fault tolerance of the Internet architecture


Describe characteristics of the Internet that help it scale to meet user demand

– Hierarchical– Common standards– Common protocols


Constraints of resources (media, bandwidth, technology, etc.) affect the Qos (mechanisms that manage congested network traffic.)


Explain the factors that necessitate Quality of Service and the mechanisms necessary to ensure it


Describe how to select the appropriate QoS strategy for a given type of traffic


Why should networks be secure? (lack of trust, confidentiality, loss of sales,etc.)

Physical security

Content security


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


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: IdentifyVocabulary Ex: MatchingPg. 5-6– Vocabulary Ex: DefinePg. 8-9 – Multiple Choice Questions

living in a network centric world

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