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ITGS: MUST KNOW TERMS NETWORK Internet • Global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. • Example: Internet Explorer, Firefox, Opera, Chrome, Safari … Intranet • Private computer network that uses Internet Protocol technology to securely share any part of an organization’s information or network operating system within that organization. • Advantages: -Workforce productivity (locating & viewing info.) -Communication -Immediate updates -Promote common corporate culture: Every user has the ability to view the same information within the Intranet. -Enhance collaboration -Cost-effective (Data shared via web-browser rather than physical documents) • Kwangmyong (North Korean Intranet) – Government authorized persons are allowed to use it. – Main function: information censorship, preventing undesirable info. Being accessed. Extranet • Computer network that allows controlled access from the outside, for specific business or educational purposes. • ‘Federal Express' Tracking System – By accessing FedEx's public site (fedex.com) and entering tracking number, customer is able to locate any package still in their system. Virtual Private Network (VPN) • Computer network that uses a public telecommunication infrastructure such as the Internet to provide remote offices or individual users with secure access to their organization's network. Routers • A device that forwards data packets across computer networks. • "traffic direction“ • Must consider SECURITY –firewall, VPN … Switches • A computer network device that connects network segments. • “Network Bridge” • Switches: operate at many OSI( Open Systems Interconnection: way of dividing a communication system into smaller parts) layers: physical, data link, network or transport. (multilayer switch) Hubs • A device for connecting multiple twisted pair or fiber optic devices together and making them act as a single network segment. • Works at layer 1(basic hardware transmission technologies of a network) of OSI model.
