Understanding, function, and range of computer network

This time we will share the science of computer networks, some of the main topics that will be discussed is the sense of a computer network, a computer network Functions, and the range of different kinds of computer networks. May be beneficial J

Article: understanding, Supporting functions, and computer components

A. UNDERSTANDING OF COMPUTER NETWORKS

A computer network is a system that consists of two or more computer systems do their job and are related to each other. Relationships formed can be in the form of a relationship of communication such as instant messaging, shared resources (resource) as data, the CPU and hardware (CD-ROM, printers), and access to information such as the web. For example, a connection between two computers, so both of them can exchange information with each other. The form of the connection can be via fibre optic, copper wire, microwave, and satellite communications (satellite radio).

Ancillary Articles: History Of Computers

The purpose of this network is rather than each computer included into the system can receive and deliver the service (service). The party that receives the service called by the client (client), and provide the service called by the server (server). So the system formed from this service is called the client-server system, even this system is used in almost all applications on the computer network.

UNDERSTANDING, FUNCTION, AND RANGE OF ASSORTMENT OF COMPUTER NETWORK

B. THE FUNCTION OF COMPUTER NETWORK

1. Security

It contains the computer network system provides a service access rights against the file or other resources, so that it is protected from copyright retrieval

2. fees

Hardware resources can be efficient because it can between the hardware and the computer can share. Building a network of small computers are also cheaper than using a mainframe. Especially with the use of client-server systems

3. High Reliability

Alternative sources can be available anytime when needed. Examples include application at a bank, which when one engine alone does not work, then the other performance may be impaired due to the source engine with each other is the same

4. Speed

The computer network will make the work faster through his sharing facilities which allow and facilitate the transfer of data (transfer) between two or more computers

5. the centralization of Management applications

On a computer network, centralizing the application program can do, so can save you time and effort to install the program on each computer. Because all applications will be installed in programkan through the Center (central).

6. Scalability

Performance can be improved by way of adding to the client or server computer with ease and without interfering with the performance of the server computer to an existing client or earlier

7. the communication Media

Computer networks allowing cooperation between people who are separated by distance. Good to communicate, even exchanging data.

8. Access to information

The information accessible more widely, even information can be accessed and obtained from a far distance though.

9. Share resources

Share resources collectively, the resource sharing, i.e. the entire program, the equipment and the data used by any person that is included into the system without being influenced by the location of the client and the server

10. Interactive Entertainment

Computer networks also allow people can get entertainment

Ancillary Articles: Type Of Type Of Computer

C. SORT – SORTS OF COMPUTER NETWORK

1. On the basis of its geographical range, namely:

1a. a parallel Computer

Parallel computers, data flow machine, as well as some examples of networks that work in the same unit, the distance between the prosessornya is the smallest, IE 0.1 m A in the same place are connected through the circuit board.

1B. Multicomputer

Is a system that communicates by means of sending a message via the short bus and very quickly. The distance between the prosessornya is 1 m, and the network is connected through a system.

1 c. LAN network (local area network)

This computer network only covers a relatively small area, between a range only within a radius of 10 m to 10 km. LAN used in computer networks in a room, room, House, building, school, and College. Wi-fi technology is one example of a LAN is often used today. A place that provides technology-based Wi-fi LAN connection is called a hotspot.

On a LAN, a user can interact and communicate with other devices by using certain applications.

1. network MAN (metropolitan area network)

This computer network covers a much larger area, that is within a radius of 10 to 50 km in this network so that commonly used in a city, Office, network pabirk/agencies and regions the Government with data transfer rates are relatively high.

1E. network WAN (wide area network)

This computer network covers the largest area, namely achieving 100 to 1000 km. this network requires a public communication channels, so its use is commonly used between the city, the region, the State even included a continent. WAN used to connect a local computer network with other local computer networks at different locations

1F. The Internet

The Internet is the largest computer network, namely, with the distance between a reach 10000 km, and it can work between one computer with another computer in one planet.

2. Based on the distribution of information, namely:

2A. centralized Networks

It consists of a computer network server computer and a client computer. Client computers here serves as an intermediary to access the data source or the required information is sourced from a single computer server.

2B. the Distributed Network

These computer networks is a combination of some centralized network, forming a system.

3. Based on the role of the computer in the process of data, namely:

3A. Client-Server Network

Is the network that has 1 or more server computers and client computers. The server computer as the provider of the information/data required, and the client computer as an intermediary to access data on the server computer. And this state of affairs can be personalised way through networking software at protokolnya.

3B. peer-to-peer

Is the network that does not have a client-server system. But all the computer can send and receive data, so that all computers can act as client or server.

4. Based on the data transmission medium, namely:

4A. Wired Network

This network connects one computer with another computer by connecting either a network cable. Which will send the information form the electrical signal dala.

4B. Wireless network

Collectively, the wireless network, which is a network with medium/intermediaries in the form of electromagnetic (that does not require a medium in perambatannya), so in this case it's not necessary cables but signals information/data remains to be sent to another computer. An example of a wireless network is Wi-fi.

5. Based on network topology, namely:

5A bus Topology.

Is the most widely used topology. By using the T-connector and connect devices with a single cable in one line, then the other networking devices easily connect. The topology of the beruntut will be a linear topology.

5b. the star Topology

Is a form of topological convergence of the central node (Central) node to other users. This topology is included in the cost of the medium because the security level is high, and that includes access control also centralized. However, if the node centralnya is broken, then the node automatically other users were also damaged.

5c. a ring Topology.

The topology is the set of points which are connected to other ketitik formed a circle to form a ring. Each node in the topology function as repeaters/repeaters that strengthens the signals along the track. In terms of each device work in strengthening their signals, and these signals are assisted by forwarding the TOKEN (which carries the information and data from the source computer).

With such systems, it has a ring topology better performance darin on a bus topology, and more efficient. However, if an error occurs on a node, the entire network can be compromised.

5. mesh topology

The head of the topology in a form of connections between devices. Each device will be connected directly to other devices that are piled up in the network. So as to enable the device in the topology of the mesh can interact directly with the other device. From this system, then the security level is more assured, because the communication that occurs between the two computers cannot be accessed by other computers. And also facilitate the identification in case of problems against the connection between computers.

However, the mesh topology will require a lot of cables and place for interactions between devices. Installation and configuration will also be more difficult.

5e. tree Topology

Is topology that consists of a collection of star topology connected in a bus topology. So it takes some of the node, which node located higher, will set the node that resides or is set lower. However, if the higher node group is not functioning, it will cause the node that is located lower to be not functioning well.