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Lesson 3 Network Computing Objectives • Understand computer networks • Describe different types of computer networks • Define Domain name and IP address What is a network? A network is a group of computers that are connected together in order to share resources and information quickly and efficiently. Client-server networks A server is a computer dedicated to provide a certain service and manage resources. Clients are the workstations that are connected to the network. Peer-to-peer networks Computers share resources and share equal control over resources. They are inexpensive, but they can handle only limited amounts of information. Found in home & small offices. Types of Networks Local Area Network Wide Area Network LAN WAN Ex. School computers Ex. The Internet A router is a gateway device between networks Network Technologies Wired: Computers can be connected together using a network cable. A network cable is used to transfer data between computers on a network. Wi-Fi: Wireless fidelity or Wi-Fi allows computers and devices to connect to a local area network wirelessly. 3G/4G: 3G and 4G are cellular data networks that are used by smartphones and mobile devices. IP Addresses & Domain Names When a computer is connected to a large network, it is given an address made up of a unique series of numbers. Ex. 69.147.76.15 An IP address helps a computer on a network find other computers on the network. Because an IP address is tricky to remember, domain names are used to represent them. Ex. juicetree.com Summary • Understand computer networks • Describe different types of computer networks • Define Domain name and IP address