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ch01_CE - Guide to Networking Essentials Fifth Edition...

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Guide to Networking Essentials Fifth Edition Chapter 1 Introduction to Networks and Networking Concepts
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Guide to Networking Essentials, Fifth Edition 2 Objectives Describe the fundamental reasons for networking Identify essential network components Compare different types of networks Understand the role of a server and describe types of servers Apply your knowledge when selecting a network type
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Guide to Networking Essentials, Fifth Edition 3 What is Networking? Networking involves connecting computers and other electronic devices for the purpose of sharing information and resources and for communication A great deal of technology is required for one device to connect and communicate with another, and many choices for physical connections and related software are possible
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Guide to Networking Essentials, Fifth Edition 4 Networking Fundamentals An elementary network consists of two computers connected by some kind of transmission medium Motivation: need to share data and to communicate quickly and efficiently Sharing enables users to exchange information and route data between them as workflow demands Can improve human communication substantially Peripheral device sharing enables users to take advantage of peripherals and other devices attached directly to a network or to a generally available computer attached to a network
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Guide to Networking Essentials, Fifth Edition 5 Networking Fundamentals (continued)
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Guide to Networking Essentials, Fifth Edition 6 Local and Wide Area Networks Local Area Network (LAN): small network, limited to a single collection of machines and one or more cables and other peripheral equipment Internetwork: networked collection of LANs tied together by devices such as routers The Internet is the best example Wide Area Network (WAN): internetwork that spans distances measured in miles and links two or more separate LANs Metropolitan Area Network (MAN): uses WAN technologies to interconnect LANs in a specific geographic region, such as a county or a city
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Guide to Networking Essentials, Fifth Edition 7 Developing a Networking Lexicon Networking is a subject rich with specialized terminology and technology Computer networks have spawned a language of their own, and half the challenge of becoming network literate lies in mastering this terminology You must learn some new vocabulary
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Guide to Networking Essentials, Fifth Edition 8 Clients, Peers, and Servers
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Guide to Networking Essentials, Fifth Edition 9 Network Medium To communicate successfully, computers must share access to a common network medium Examples: twisted-pair, coaxial and fiber-optic cable, and wireless media Its job is to carry the signals one computer sends to one or more other computers Computers must attach to the network medium by using some kind of physical interface Network interface card (NIC) or network adapter For large-scale networks, multiple media usually work together (interoperate) across the total networking environment
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