ABB UNS0887A-P 3BHE008128R0001 Communication adapter

Description

Communication adapter, also known as network Interface board (network adapter) or network interface Card (NIC, Network Interface Card), now more people are willing to use the simpler name “network card”. It is a necessary part of computer systems, mainly used to connect shared resources. The following is a detailed analysis of the communication adapter:

I. Basic definition
Definition: UNS0887A-P 3BHE008128R0001 Communication adapter is an intelligent circuit, the main role is to convert parallel data in the computer into serial data for transmission in the local area network.
Alias: network interface board, network interface card, and network adapter.
Function: Connect to shared resources, is the LAN connection computer and transmission media interface.
Two, the main function
Physical connection: Achieve physical connection and electrical signal matching between the LAN transmission medium.
Data conversion:
When sending, the UNS0887A-P 3BHE008128R0001 adds the header and tail to the data handed over from the previous layer to form an Ethernet frame.
When received, the Ethernet frame is stripped of the header and tail and sent to the upper layer.
Link management: Mainly the implementation of the CSMA/CD protocol, that is, carrier sense multiple access/collision detection.
Coding and decoding: involves Manchester coding and decoding.