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Showing posts from May, 2018

LO2 Network and interconnection devices

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Network devices What is workstation and NIC? It is a computer dedicated to user or group of users engaged in business or professional work. NIC is a circuit board or card installed in computer so that it connected to a network. Different types of servers Features and Functions Print - A computer that process print related jobs on a network of computers. It allows users in a computer network to perform a printing job without having move files to the computer connected directly to the printer. Mail - A computer system that sends and receives email Web - A program to serve file that form Web pages to users, in response to their requests. Proxy - It is dedicated computer or a software system running on a computer that acts as an intermediary    between an endpoint device. It allow client computers to make indirect network connection to other network services. - File To stores network users data files Interconnection devices - Router It fac

Wireless Techologies

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802.11        - It is a wireless LAN that controls the transmission of user data into the physical layer        Example -                       WI-FI I nfrared -        It is a region of electromagnetic radiation spectrum where wavelength range from about 700 nanometers to 1 millimeter How infrared works? -        By send out pulses of infrared light that represents specific binary codes. Example -        Smartphone, remote control Bluetooth -        It is a wireless technology that allow devices to communicate or to send data or voice, wirelessly over a short range distance How Bluetooth works? -        By communicate with each other using a radio signals and infrared light beams Example -        Connect to other mobile phone to send media 3G -        3G is the third generation of wireless technologies, like high-speed transmission, advanced multimedia access, and global roaming. Example -        Mobile phones