VARIOUS COMMUNICATION INTERFACE DEVICES

COMMUNICATION INTERFACE DEVICES

A communication interface device connects communication machines to a communication network that interconnects communication machines and management devices. Communication interface devices operate or monitor machines. The communication interface device includes a socket server to convert signals between machines and the communication network.

INTERFACE DEVICE


VARIOUS COMMUNICATION INTERFACE DEVICES


NETWORK INTERFACE CARD


NIC is an adapter that provides a connector for attaching a network cable to a server or workstation. It is a microprocessor-based device that contains hardware and software to communicate throughout the network and to process all communications. (intelligence) to do the processing. This is a PCB installed in a microcomputer. It can also be called a network card, network adapter, or NIC, onboard circuitry provides the required protocols and commands.


The NIC has additional memory for buffering all incoming and outgoing data packets. This improves network performance. The NIC card is available in 8 bit, 16 bit and currently around 32 bit standards, but NIC is required only if the networking capability is not already available on the computer.


MODEM


A modem is a communication device that is used to transmit computer data through ordinary telephone lines because computer data is in digital form but telephone lines are analog. It is also an encoding as well as a decoding device that is used in data transmission. It converts digital computer signal into analog telephone signal (modulation). And converts analog telephone signals into digital computer signals (demodulation).


The modem speed is in kbps (seconds on kilobits). There is a 56.6 kbps modem standard. It helps to reach the remote computer. In this way, an employee at home can access computer files and can also exchange files with other employees.


MULTIPLEXERS


It is a form of data transmission, in which a communication channel performs multiple transmissions at the same time. The multiplexer is a device that transports a large number of low-speed transmission lines from high-speed transmission lines. Thus the multiplexer can split a single communication line between terminals. The multiplexer can scan each device on the CPU to collect and transmit data in a single line.


It can also deliver data to the appropriate terminals connected to the CPU and multiplexer, this function can be very complex and on some systems, a separate computer processor is dedicated to this activity and is called a "front-end-processor". " E.g. Using telephone line multiplexing can provide thousands of our conversations at the same time. A large number of transmissions depends on the type of communication channel and the rate of communication.


FRONT - END COMMUNICATION PROCESSOR


These are programmable devices, which control the functioning of the communication system. The tasks that the mainframe computer has to execute on its own, help the mainframe computer in performing such tasks, it is like a minicomputer that works between the mainframe computer and the modem in these functions to code conversion, Text Editing, Verification, Recognition of Terminal and Control of Transmission Lines are included, with this the mainframe computer can devote its time to data processing rather than data transmission.


PROTOCOL CONVERTERS


Unless the communication standards are strictly followed, dissimilar devices (devices that do not have similarity) cannot communicate with each other, such standards are usually called communication protocols. Known as a protocol is a group of rules that are useful for maintaining communication between different types of devices.


Usually, an organization uses many types of computers, transmission channels, transmission modes, and data codes. Protocol converters help to communicate data between such diverse components and computers. For example, it may be necessary to convert data from ASCII to EBCDIC. Protocol conversion can be done by hardware, software, or a combination of hardware and software.


HUB


A hub is a hardware device that provides a common wiring point in the LAN (Local Area Network). Each node available in the network is connected to the hub with twisted pair cable wires, followed by the hub on other LANs, the company's WAN, or the Internet. But a link provides a connection with the help of a high-speed link. It usually works in half-duplex mode. A hub can be active and passive.


SWITCHES


These are hardware devices used to send messages on a network, switch from temporary points to point links between two nodes on a network, and send data along with that link.


REPEATERS


When data is transmitted through multiple cables, the signal is degraded. Repeaters are used to avoid such problems. The repeaters amplify the signal before passing through the next part of the cable.


BRIDGES


The main function of the bridge is to receive and pass data between two LANs that use the same protocol and topology, to successfully transmit (transmit) this data, increasing the bridge signal. Thus a bridge acts as a link along with a repeater.


GATEWAY


Gateways are similar to bridges because they are used to transfer data from one network to another, but the gateway is also used to transfer data between two networks that use non-standard protocols and terminals. Use E.g. Many years ago, a sales department of a company set up a LAN. Today the Accounting Department wants to set up LAN but use the latest technology. Now, these networks are using two different topologies and protocols, now these two separate LANs can be connected using a gateway.


ROUTER


The router is used to route data between several nodes in the network. Router computers are similar to bridges, but can also provide network management utilities to the user. It plays a huge role in managing network traffic. Their job is to ensure that the data arrives at the appropriate destination. The router is usually not required for LANs because the network itself can handle its own internal traffic, routers play an important role when data is sent between different networks.


Routers check the packet to determine their destination. They take into account the number of activities on the network and they send the packet to another router that is closer to the final destination. | If a network is out of order, the router can route data through another suitable route.


REMOTE ACCESS DEVICE


A remote access device is a modem bank that acts as a gateway to the Internet or a corporate network. Their function is to route any incoming or outgoing connections properly.

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