What is a Computer Network.Computer Network is a computer network system. This means connecting two or more computers together with a cable. Or other media. Enables computers to transfer information to each other. In case of a connection between multiple computers. Machine to a large central computer. We refer to this as the central host computer (Host) and a small computer connected to the client (Client / Terminal).Network (Network) to link computers together to communicate. We can send building. Or across the city to the other side of the world. The data. All text, images, audio could be causing this. Quickly to users. The ability of these computer networks are important. And necessary for the use in various circles.Form of a network can be divided into the following three.1. LAN (Local Area Network) is a group of computers connected together in a limited space. For example, within an office building. Or in the factory. Cables are used for communication.2. MAN (Metropolitan Area Network) is a multi-LAN LAN system with the space adjacent to connected. To be larger. Such connections in the city. Or in the provinces.3.WAN (Wide Area Network) is a group of computers connected together to form extensive May be in the country. Or between the multiple LAN or MAN, which is a different area. Connected together like the New York office, connected to London to communicate. May be used from the phone line to the satellite.- There may be another type of SAN (Small Area Network) is a group of computers connected together in a very small area. May be in the house. Or small office with a computer should not be more than 10 machines.
Computer network.
Elements of the network.Computer network. Are important components. Connected to a computer network, including the host computer (File Server) communication channels. (Communication Chanel) workstation (Workstation or Terminal) and network devices (Network Operation System).1. The host computer.Host computer. Means the computer. Acting as a resource (Resources), including various memory, processor, memory and database backup programs, etc. in the local area network (LAN) is a computer called a server. The network remotely. Used mainframe computers or mini-computers as the hub of the network. We call thatHost Computer and retrieval machines waiting for service or the client workstations.Two. Communication channel.Communication channel refers to the medium used as a path or way. To transmit data. The receiver (Receiver) and sender information. (Transmitter) present a communication channel. For network connection. There are many different types of computers. Phone line not insulated twisted pair (UTP) twisted pair cable. With insulated (STP) cable Coaxial al. Fiber optic Micro Web and satellite radio etc.Communication channels using satellite.Three. Workstations.Workstation (Workstation or Terminal) refers to a device or a microprocessor connected to a computer network. Acts as a terminal or workstation. The service from the machine. Host computer. Called a workstation. (Workstation) in the network distance. Usually a processor. Or their own CPUs. The system used in mainframe computers. Centric. The terminal's Terminal Terminal (Terminal) consists of a monitor and keyboard only. No central processing unit itself. To use the computer's central processing unit or Host.Four. Devices in the network.- Network adapter (Network Interface Card: NIC) circuit means for Used to connect the network cable. Installed on a server computer. And the client. The function of this card is sent from the computer through the transducer cable. The computers in the network can exchange information.Network adapter.- Modem (Modem: Modulator Demodulator) refers to a device for converting digital signals (Digital) from the sender's computer. To send the signal information in analog (Analog) on the side of the computer. Modem, it converts the analog signal. Into a digital computer. For processing. Typically use a modem to the network remotely. Using the telephone as a medium such as the Internet.Using a modem to connect to the network remotely.
- Hub (Hub) is a device connected to a hub and a cable to achieve this. Connecting to the Network Star (Star) is usually used as a connection cable between Workstation and File Server on it.Hub using a point and the intersection point of the line.Five. Operating system software, networkNetwork operating system software refers to software that acts. Management of the computer network. To the computer. Connected to the network. Can communicate. Exchange data accurately. And effective. Management of security functions. Of the network. And controls. The application. The communication. To work on the network as well. That the network operating system software. Are important for computer networking especially for this type of software include. Operating system, Windows NT, Linux, Novell Netware, Windows XP, Windows 2000, Solaris, Unix etc.
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