Networks

 Section 4 of the Theory (Paper 1)- Networks

• Router: A router is a device that forwards data packets across computer networks. Routers perform the data "traffic directing" functions on the Internet. A router is a microprocessor-controlled device that is connected to two or more data lines from different networks. For more info:http://en.wikipedia.org/wiki/Router

• WIFI:A Wi-Fi enabled device such as a personal computer, video game console, smartphone, or digital audio player can connect to the Internet when within range of a wireless network connected to the Internet. The coverage of one or more (interconnected) access points — called hotspots when offering public access — generally comprises an area the size of a few rooms but may be expanded to cover many square miles, depending on the number of access points with overlapping coverage. For more info:http://en.wikipedia.org/wiki/WIFI

• Browser: A web browser or Internet browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. For more info:http://en.wikipedia.org/wiki/Web_browser

• WAN: A wide area network (WAN) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries). This is in contrast with personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively. For more info: http://en.wikipedia.org/wiki/Wide_area_network

• LAN:A local area network (LAN) is a computer network that connects computers and devices in a limited geographical area such as home, school, computer laboratory or office building. The defining characteristics of LANs, in contrast to wide area networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines. For more info: http://en.wikipedia.org/wiki/Local_area_network

• Intranet: An intranet is a 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. The term is used in contrast to internet, a network between organizations, and instead refers to a network within an organization. For more info: http://en.wikipedia.org/wiki/Intranet