Mạng Network - Living in a Network Centric World

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Chapter 1 - Living in a Network Centric World CCNA Exploration 4.0 Học viện mạng Bách khoa Website: www.bkacad.com Overview • • • • • • 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 Wikiserver. H c vi n m ng Bách khoa - Website: www.bkacad.com Networks Supporting the Way We Live • Early data networks were limited to exchanging character-based...

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Chapter 1 - Living in a Network Centric World CCNA Exploration 4.0 Học viện mạng Bách khoa - Website: www.bkacad.com
Overview • 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 Wikiserver. H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Live • Early data networks were limited to exchanging character-based information between connected computer systems. • Current networks have evolved to carry voice, video streams, text, and graphics between many different types of devices. H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Live The Global Community • The creation of online communities for the exchange of ideas and information has the potential to increase productivity opportunities across the globe. • As the Internet connects people and promotes unfettered communication, it presents the platform on which to run businesses, to address address emergencies, to inform individuals, and to support education, science, and government. • Play video to watch how the Internet, and its underlying technology, brings opportunities to people wherever they live or work H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Live • Data networks that were once the transport of information from business to business have been repurposed to improve the quality of life for people everywhere. H c vi n m ng Bách khoa - Website: www.bkacad.com
Examples of Today’s Popular Communication Tools • The existence and broad adoption of the Internet has ushered in new forms of communication that empower individuals to create information that can be accessed by a global audience such as: – Instant Messaging – Weblogs (blogs) – Wikis – Podcasting – Collaboration Tools H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Learn • Communication, collaboration, and engagement are fundamental building blocks of education. • Robust and reliable networks support and enrich student learning experiences. • Courses delivered using network or Internet resources are often called online learning experiences, or e-learning. • Online courses can contain voice, data, and video, and are available to the students at any time from any place. H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Learn • Online learning opportunities can decrease time-consuming and costly travel yet still ensure that all employees are adequately trained to perform their jobs in a safe and productive manner. • Online courseware and delivery offer many benefits to businesses such as: – Current and accurate training materials. – Availability of training to a wide audience. – Consistent quality of instruction. – Cost reduction. H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Work • The business networks evolved to enable the transmission of many different types of information services, including e-mail, video, messaging, and telephony. • Today, networks provide a greater integration between related functions and organizations than was possible in the past. H c vi n m ng Bách khoa - Website: www.bkacad.com
Networks Supporting the Way We Play • Describe ways communication over a network supports the way we play H c vi n m ng Bách khoa - Website: www.bkacad.com
What is Communication? • Communication in our daily lives takes many forms and occurs in many environments. • Before beginning to communicate with each other, we establish rules or agreements to govern the conversation. These rules, or protocols, must be followed in order for the message to be successfully delivered and understood. Among the protocols that govern successful human communication are: – An identified sender and receiver – Agreed upon method of communicating (face-to-face, telephone, letter, photograph) – Common language and grammar – Speed and timing of delivery – Confirmation or acknowledgement requirements H c vi n m ng Bách khoa - Website: www.bkacad.com
Quality of Communications • The external factors affecting communication are related to the complexity of the network and the number of devices a message must pass through on its route to its final destination. • External factors affecting the success of communication include: – The quality of the pathway between the sender and the recipient – The number of times the message has to change form – The number of times the message has to be redirected or readressed – The number of other messages being transmitted simultaneously on the communication network – The amount of time allotted for successful communication H c vi n m ng Bách khoa - Website: www.bkacad.com
Quality of Communications Internal Factors • Internal factors that interfere with network communication are related to the nature of the message itself. • Internal factors affecting the successful communication across the network include: – The size of the message – The complexity of the message – The importance of the message H c vi n m ng Bách khoa - Website: www.bkacad.com
Communicating over Networks • These data or information networks vary in size and capabilities, but all networks have four basic elements in common: – Rules or agreements to govern how the messages are sent, directed, received and interpreted. – The messages or units of information that travel from one device to another – A means of interconnecting these devices - a medium that can transport the messages from one device to another – Devices on the network that exchange messages with each other H c vi n m ng Bách khoa - Website: www.bkacad.com
The Elements of a Network H c vi n m ng Bách khoa - Website: www.bkacad.com
The Elements of a Network H c vi n m ng Bách khoa - Website: www.bkacad.com
The Elements of a Network H c vi n m ng Bách khoa - Website: www.bkacad.com
The Elements of a Network • Protocols are the rules that the networked devices use to communicate with each other. H c vi n m ng Bách khoa - Website: www.bkacad.com
Converged Networks Multiple services-multiple networks • Traditional telephone, radio, television, and computer data networks each have their own individual versions of the four basic network elements. H c vi n m ng Bách khoa - Website: www.bkacad.com
Converged Networks Converged networks • Technology advances are enabling us to consolidate these disparate networks onto one platform - a platform defined as a converged network. H c vi n m ng Bách khoa - Website: www.bkacad.com