It is not an exaggeration to say that the information is one of the most important questions for each company. The transfer of data to individuals is also important. Computer networking developed to facilitate communication between computers faster and easier. It not only offers faster communication, but also the users to remote applications and databases from the same company or other organizations to access.
Apart from that, are there other reasons for the use of computer networks. Through a computer network, the cost could through the exchange of hardware and software and a reduction instead of mainframes are reduced to micro-networks. The gathering of information from multiple sources has become easier, thus increasing the reliability of the data.
By definition, such as computer networks is simply the process of connecting multiple computers to communicate that information and resources that could be shared by all devices.
Categorization of computer networks over wide range of functions such as media for communication via the protocol could be done, network topology, communication, etc.
Media of computer networks used
For communication between two devices, an environment is necessary. There are different media, such as electrical cables, fiber optic and radio waves, which are used for networking. Fiber optic and electrical wire used in the art, while radio waves are used in wireless technology.
Wired Networks
Wired in twisted-pair cable is the most commonly used for communication. Twisted-pair cable is the wire that are twisted in pairs. Wireless network consisting of four pairs of metallic son that will be used for data and voice transmission. The purpose of the use of twisted-son is the noise caused by electromagnetic induction, and to minimize crosstalk. There are two pairs of twisted son, namely twisted pair and twisted pair. The speed range of twisted-pair cable is 2 megabits per second to 10 billion bits per second.
Another method widely used in wired technology, a coaxial cable. It is primarily for local area networks, systems, cable TV, etc. The metal son, covered with an insulation layer made of a flexible material with a high dielectric constant, is manufactured, used enclosed by a conductive layer. The purpose of using the insulating layer is to minimize noise and signal distortion.
The fiber is another means of communication, invented in the second half of the twentieth century. Its components are fiberglass filaments with protective layers, the data transmitted via pulses of light coated. It transmits light signals over long distances. Electromagnetic interference can not be performed on the signals from her. Could achieve the maximum transfer rate of billions of bits per second.
For all types of functional disorders of the cable support system is provided by multiple service providers.
Wireless Networks
There are several popular wireless technologies such as wireless LAN technology, satellite communications, infrared communications technology for terrestrial microwave, etc.
Wireless LAN technology uses frequency Hi, which is similar to digital cellular mobile radio-frequency and low. This spread-spectrum technology to connect multiple devices in a limited area. Wireless LAN in an office or home support could easily be implemented with the help of many PC vendors.
Communication satellites using radio signals, microwave as a means of communication because radio signals are less influenced by the Earth’s atmosphere. Data signals, voice and television will be transmitted and received via radio to a microwave.
Infrared communication technology is used to transfer signals between devices at close range. The maximum distance traveled by this technology is normally 10 meters.
Microwave technology uses low-gigahertz range of the signal, which limits the transmission line of sight. The maximum distance between the base stations, microwave signal is 48 km.
Could wireless computer network is the backbone of the business processes and technology that has been damaged immensely when the system runs out of network. In this case, the online computer support can be used to specify the network system are properly adjusted.
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