Download Living in a Network Centric World

Living in a Network
Centric World
Network Fundamentals – Chapter 1
Version 4.0
© 2007 Cisco Systems, Inc. All rights reserved.
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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.
© 2007 Cisco Systems, Inc. All rights reserved.
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How Networks Impact Daily Life
 Benefits of instantaneous communication
 How it supports and improves our lives
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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
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How Networks Impact Daily Life
 Information networks used to improve teaching and
learning
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How Networks Impact Daily Life
Communication over networks change the way we work
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How Networks Impact Daily Life
 Network support the way we play
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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
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Data Networking Role, Components, and Challenges
The role of data networks in communications
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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
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Data Networking Role, Components, and Challenges
 Describe the role of converged networks
– Converged network
• Carry data, voice, video & images over the same network
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Network Architecture Characteristics
 Four characteristics addressed by network architecture
design
– Fault tolerance
– Scalability
– Quality of service
– Security
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Network Architecture Characteristics
How packet switching helps improve the resiliency and
fault tolerance of the Internet architecture
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Network Architecture Characteristics
 Scaling networks to meet user demand
– Hierarchical
– Common standards
– Common protocols
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Network Architecture Characteristics
Quality of Service factors and the mechanisms to ensure
QoS.
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Network Architecture Characteristics
Describe how QoS works.
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Network Architecture Characteristics
 Select the appropriate QoS strategy for a given type of
traffic
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Network Architecture Characteristics
Why secure networks
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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
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IRC Clients and Wiki Server
 Install and use IRC clients and a Wiki server
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Summary
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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.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
22
Living in a Network Centric World
Next
Communicating over the Network
© 2007 Cisco Systems, Inc. All rights reserved.
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