Adapter Is A Standalone Hardware Interface Device
An adapter is an interface converter that can be an independent hardware interface device that allows hardware or electronic interfaces to be connected to other hardware or electronic interfaces or an information interface. For example: Power adapter, tripod base transfer components, USB and serial port transfer equipment.
The adapter can also be applied to the fiber terminal box, which is a device that makes the plug of different sizes or types want to match with the information socket, Adapter so that the application system equipment connected by the fiber is successfully plugged into the network.
The adapter is originally a network interface board inserted inside the host box (or a PCMCIA card is inserted into the laptop). This interface board is also known as a network interface NIC (Network Interface Card) or a "Nic". Because this adapter is already embedded on newer computer motherboards, Adapter no separate network adapters are used, so here we use the more accurate term adapter. Processor and memory (including RAM and ROM) are installed on the adapter. The communication between the adapter and the local area network is performed serially through a cable or twisted pair, and the communication between the adapter and the computer is carried out in parallel via the I/O bus on the computer's motherboard. Therefore, an important function of the adapter is to perform data serial transmission conversion. Adapter Because the data rate on the network is not the same as the data rate on the computer bus, the storage chip that caches the data must be installed in the adapter. When inserting an adapter on the motherboard, you must also install the device driver that manages the adapter on your computer's operating system. Adapter The driver will then tell the adapter where to send the long chunks of data from the storage to the local area network, or to store the data blocks that the local area network transmits over the storage location. The adapter also needs to be able to implement the Ethernet protocol.
The adapter receives and sends various data frames without using the computer's CPU. The CPU can then handle other tasks. When the adapter receives a frame with errors, Adapter it discards the frame without having to notify the computer. When the adapter receives the correct frame, it uses interrupts to notify the computer and deliver it to the network layer of the protocol stack. When the computer to send the IP data time, Adapter the protocol stack to the IP datagram down to the adapter, assembled into the frame and sent to the local area network.