সঠিক উত্তর হচ্ছে: NIC
ব্যাখ্যা: Each networked device contains a Network Interface Card. The NIC may be a separate board installed into a computer’s slot, or it may be built into the motherboard. Either way, the NIC is the bridge between the computer and the network, and is a gatekeeper of sorts, because it decides whether to process a data packet or not, either passing it on to the computers processor or discarding it based on the destination address in the packet. The NIC also takes information from the processor, formats it for transmission and puts it on the wire.