© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1Version 4.0

Living in a Network Centric World

- Tại sao phải biết về mạng ?- Học mạng là học những gì ?- Cơ hội nghề nghiệp

2© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

How Networks Impact Daily Life Network supports the way we live

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How Networks Impact Daily Life Network supports the way we learn

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How Networks Impact Daily Life Network supports the way we work

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How Networks Impact Daily Life Network supports the way we play

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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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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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Học mạng là học những gì?

Network Structure

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Network Structure the components of a network

• Devices

• Media

• Services

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Networking Career opportunities

Cơ hội nghề nghiệp

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Networking Career opportunities

Traditional IT: programmers, software engineers, data base administrators and network technicians.

Now joined by new titles:

Network architect (Kiến trúc mạng)

e-Commerce site designer (Thiết kế Website thương mại điện tử)

Information security officer (Chuyên viên an toàn thông tin)

And home integration specialist (chuyên gia tích hợp hệ thống gia dụng).

12© 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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