Exploration1 Network Chapter 1
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Transcript of Exploration1 Network Chapter 1
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© 2007 Cisco Systems, Inc. All rights reserved. Cisco PublicITE PC v4.0Chapter 1 1
Living in a Network Centric World
Network Fundamentals – Chapter 1
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ITE PC v4.0Chapter 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.
Install and use IRC clients and a Wiki server.
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ITE PC v4.0Chapter 1 3© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
How Networks Impact Daily Life Explain the benefits of instantaneous communication
and how it supports and improves our lives.
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ITE PC v4.0Chapter 1 4© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
How Networks Impact Daily Life 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
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ITE PC v4.0Chapter 1 5© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
How Networks Impact Daily Life Explain ways that using information networks to share
and collaborate improves teaching and learning
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How Networks Impact Daily Life Describe ways communication over a network changes
the way we work
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ITE PC v4.0Chapter 1 7© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
How Networks Impact Daily Life Describe ways communication over a network supports
the way we play
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ITE PC v4.0Chapter 1 8© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Data Networking Role, Components, and Challenges Basic characteristics of communication
–Rules or agreements are 1st established
–Important information may need to be repeated
–Various modes of communication may impact the effectiveness of getting the message across.
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ITE PC v4.0Chapter 1 9© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Data Networking Role, Components, and Challenges Describe the role of data networking in communications
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ITE PC v4.0Chapter 1 10© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Data Networking Role, Components, and Challenges
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
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ITE PC v4.0Chapter 1 11© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Data Networking Role, Components, and Challenges Describe the role of converged networks in
communications–Converged network
• A type of network that can carry voice, video & data over the same network
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ITE PC v4.0Chapter 1 12© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Explain four characteristics that are addressed by
network architecture design–Fault tolerance
–Scalability
–Quality of service
–Security
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ITE PC v4.0Chapter 1 13© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Describe how packet switching helps improve the
resiliency and fault tolerance of the Internet architecture
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ITE PC v4.0Chapter 1 14© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Describe characteristics of the Internet that help it scale
to meet user demand–Hierarchical
–Common standards
–Common protocols
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ITE PC v4.0Chapter 1 15© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Explain the factors that necessitate Quality of Service
and the mechanisms necessary to ensure it
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Network Architecture Characteristics Describe how QoS mechanisms work to ensure quality
of service for applications that require it.
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ITE PC v4.0Chapter 1 17© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Describe how to select the appropriate QoS strategy for
a given type of traffic
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ITE PC v4.0Chapter 1 18© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics Describe why networks must be secure
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ITE PC v4.0Chapter 1 19© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Network Architecture Characteristics 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
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ITE PC v4.0Chapter 1 20© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
IRC Clients and Wiki Server Install and use IRC clients and a Wiki server
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ITE PC v4.0Chapter 1 21© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public
Summary
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ITE PC v4.0Chapter 1 22© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public