Networks
Networks
• A collection of computers and devices connected by communications channels that facilitates communications among users and allows users to share resources with other users.Sharing resources include data & information , software and communication.
•A network interface card is used to connect a computer to a network of other computers. A server is any computer that accepts requests from other computers that are connected to it and shares some or all of its resources, such as printers, files, or programs, with those computers. Connecting computers this way is called a client/server network.
•The server runs software that coordinates the information flow among other computer called clients. Network operating system is the software that runs on the server.
• A network that works over a relatively short distance (no more than a few thousand feet ) is called a local area network (LAN).
Wide area network - Network that covers large geographic area. Internet is world’s largest WAN.
Metropolitan Area Network (MAN) - Backbone network that connects local area networks in a metropolitan area such as a city or town.
Types of Internetworks
• Intranets generally make company information accessible to employees and facilitate working in groups. Simple intranet applications include electronic publishing of organizational materials such as telephone directories, event calendars, procedure manuals, employee benefits information, and job postings.
•An extranet is a type of network that extends to authorized users outside the company. Extranets facilitate communications among a company's customers or suppliers. A firewall restricts access to data and information on a network.
• A collection of computers and devices connected by communications channels that facilitates communications among users and allows users to share resources with other users.Sharing resources include data & information , software and communication.
•A network interface card is used to connect a computer to a network of other computers. A server is any computer that accepts requests from other computers that are connected to it and shares some or all of its resources, such as printers, files, or programs, with those computers. Connecting computers this way is called a client/server network.
•The server runs software that coordinates the information flow among other computer called clients. Network operating system is the software that runs on the server.
• A network that works over a relatively short distance (no more than a few thousand feet ) is called a local area network (LAN).
Wide area network - Network that covers large geographic area. Internet is world’s largest WAN.
Metropolitan Area Network (MAN) - Backbone network that connects local area networks in a metropolitan area such as a city or town.
Types of Internetworks
• Intranets generally make company information accessible to employees and facilitate working in groups. Simple intranet applications include electronic publishing of organizational materials such as telephone directories, event calendars, procedure manuals, employee benefits information, and job postings.
•An extranet is a type of network that extends to authorized users outside the company. Extranets facilitate communications among a company's customers or suppliers. A firewall restricts access to data and information on a network.
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