Lots of computer network equipment. To give only the important ones are discussed on this occasion:
Terminal
There are five types of terminals and terminal keyboard is common and the most popular.
Keyboard terminals are input terminals which are very popular among computer users. Users can use the keyboard mengentri data, providing specific instructions to publish reports and so on.
Telephone Terminal Keys: computers can also be equipped with an audio response. Can send messages that can be heard by the user on the telephone keypad. Keystrokes used to transmit data and instructions to the computer.
The point of sales terminals (point of sale) We also can see how readers charakter optics used in the supermarket. This terminal provides a way to enter transaction data into the database at the time penjuala (point of sale). For this reason the terminal is called the terminal point of sale (POS)
Data Collector Terminal. Suatau special type of terminal is designed for use by factory workers. Tool known as a terminal to collect data (data collection terminal) used to collect data, identifies the presence and work performance of employees. OCR tool is used to read charakter and document that accompanies the job is running in the factory.
Special terminal is a terminal specifically designed for a specific keperlua such as cash registers equipped with special buttons. One key for one type of seller
NIC (Network Interface Card)
Lan network card or cards are installed on each computer that will be connected to a computer network. Many types and brands of network cards that are available in the market, but some basic things you need to know which type of network card ISA or PCI card with 10 or 10/100 Mbps speed, must be adapted to the type of Ethernet switching HUB or to be used, the type of protocol and cable types it supports in addition to product quality was also ruled out. New kind of computer is not equipped with ISA slots even Onboard Network Interface is generally a system that is already available on the mainboard so no need to install Lan Card
In accordance with the level of demand for computer networks, many new types of computer mainboard equipped with an on board network card. Quality in the good but the author believes is better to use a separate network card. One of the advantages is that it can choose a particular brand and easily replaced if damage occurs.
Hub or concentrator
Hub is a network device that consists of many ports to connect a node or point to form interconnected networks in star topology. If the number of ports available is not sufficient to connect all computers to be linked into a single network can be used several hubs that are connected in an up-link.
Port are available usually until 8, 16, 24 or more to suit your needs. For speed, you can use a HUB or Switch 10 10/100. We recommend using a 10/100 because it can be used for maximum speed network 10 or 100. Hub existing coax cable that supports the menukung pemggunaan BUS topology and UTP to support the STAR topology. However, the latest type tend to only provide support for the use of UTP cable.
see also
UTP connector (RJ-45)
To connect the UTP cable RJ-45 connector is required or the type of jack that looks like a telephone cable jack, but cable has more holes. Connectors are installed at both ends of the cable with a special Tang equipment UTP. But if it is not able to install it, you can request an advertiser at a time when to buy UTP Cable
UTP cable
There are several types of cables used in network line, but the most widely used in private network / local area network today is UTP cable.
Bridge
Bridge used to connect between networks that have the same protocol. The end result is a single logical network. Bridge can also be used in networks which have different physical media. Examples of networks that use fiber networks using obtik with coacial.
Bridge learn who passes the destination address and directs traffic to the destination. Also used to insulate the network. If the network is slowed by the existence of the network traffic management can be divided into two smaller entity.
Switch
Bridge is a development of the concept. There are two basic architectures that are used on the switch, ie the cut-through and store and forward. Switch cut-through has the advantage in speed because of the side when a package arrived, the switch just prior notice forwarded to the destination address tijuannya segment, whereas the store and forward switch is the opposite. These switches receive and inspect the entire contents of the package before forwarded to the destination and to check a package requires time, but this process allows switches know of any damage to the packet data and prevent it from disturbing the network.
By Swith there are some advantages because all segments of the network has a bandwidth of 10 Mbps full. Network share is not divided as to the use of hubs.
Cluster Control Unit
Cluster Control Unit to build relationships between the terminal-controlled with equipment and network equipment. This tool allows multiple terminals to share one printer or access multiple computers through the different networks. Cluster Control Unit can also do error checking and changing the code.
Multiplexer
When multiple terminals to share a single channel at the same time, multiplexers can be added at each end. Multiplexer is a device that allows sending and receiving messages simultaneously bebrpa. Additional multiplexers such change affects one-lane road into the highway with several lanes.
Setting port numbers and protocols that send data at the correct software module within the host.
Front-end Processor
Front-end Processor computer network that handles traffic into and out of the host computer. Both computers can represent any kind, but the general configuration consists of a special kind of mini computer that functions as a front-end processor and a host mainframes.
Front-end Processor functions as a unit of input from the host with mengumpuklkan incoming messages and prepare the data for the host. Front-end processor also functions as a unit of output from the host by receiving the messages for transmission to the terminal.
Although the transmission speed between the channel and front-end processor is relatively slow (in most cases the bits are transmitted serially) tarnsmisi speed front-end processor with a host can take place rapidly (several bits are transmitted in parallel).
Some front-end processor do message switching by regulating the route (routing) messages from one terminal to another without involving the host. If for some reason the receiver can not receive messages (perhaps Whereas, used or damaged) front-end processor can store the message in the secondary storage and send it later. This capability is called store and forward (store and forward).
Host
Host data processing work for the network. Incoming messages are handled in the same way with the data received from the unit in any type of unit. After processing the message can be transmitted back to the front-end processor for routing.
Router
Router does not have the ability to learn, but can specify the path (path) data between two networks most eficien. Routers operate at the Network layer (third layer of the OSI.). Routers do not care about topology and Access level used by the network. Because it operates at the network layer. He is not hindered by the media or communications protocol. Bridge nd see where the data packets, Router only knows where the next router is placed. It can be used to connect networks that use the same high-level protocol.
If the data packet arrives at a router, it determines the best route for the packet by performing checks on a router table. He only saw only see the package sent to him by the previous router.
Brouter
Is a technology that combines the bridge and router. In fact, often incorrectly referred to as routers multiprotokol. Although in reality he is more complicated than what is called a router multiprotokol the truth.
Getway
Gateway is equipped with six or seven layers of the support structure of the OSI protocol. He is joining methods and network to network to host the most sophisticated. Gateway can be used for connecting networks having different architectures such as PC based Novell SNA or Ethernet network
Modem
The only time the modem is not required when the telephone is used as a terminal button. All other computer network channel requires a modem at each end. Modem designed to operate at a certain speed is usually 300, 1200, 2400, 4800 or 96 000 bits per second and beyond the speed of the modem determines the speed of data transmission.
ADSL is a modem type for the use of high speed internet accses. Generally, an ADSL modem is an integration of a modem, firewall and Ethernet switches and routers, and possibly also with transiever. ADSL Modem working on a different frequency to the frequency used in that channel Telephone Telephone conversations can be used to percapapan conjunction with the use of data transmission melelalui ADSL modem.
Radio
