Industrial computer network card also occupies a very important position in industrial computer equipment, in the face of different types of network cards, how do we choose industrial computer network card?
What are the types of IPC network cards?
Variety 1: Cable TV and wireless network card
Wired network cards are generally connected to optical fiber Ethernet switches according to optical fiber cables, and in short, industrial computers must be connected to network cables to carry out data connection. Wireless network card is the use of radio waves as the information content transmission method of wireless local area network (WLAN), and the wired card *** big difference depends on, and the transmission method is different, wireless technology is used to replace the network cable. We can connect a wireless network card on the industrial computer to complete the Internet function by wireless connection.
Variety 2: 100 Gigabit network card and Gigabit network card
According to the applicable transmission speed of the industrial control network card, it can be divided into four categories: 10Mbps card, 100Mbps card (10MBPS card), 10/100Mbps adaptive network card, and 1000Mbps card (Gigabit network card). In the meantime, the relativity of the scope of 100 Gigabit and Gigabit network cards is pervasive. Generally speaking, the vast majority of 1000Mbps industrial computer network cards are used for high-speed industrial control servers.
Introduction to the functions of the network card:
1. Encapsulation and decapsulation of data
When transmitting, the data handed in by the previous layer is added to the header and tail to become an Ethernet frame. When received, it detaches from the head and tail of the Ethernet frame and sends them to the upper layer. To put it simply, it is to encapsulate the data information of the industrial computer into a frame and transmit data to the Internet according to radio waves. Secondly, it receives the frames transmitted by other devices in the network, arranges the frames into data information from the beginning, and sends them to the corresponding industrial computer.
2. Articulation management methods.
The intent is to complete the CSMA/CD (Carrier Communication with Collision Detection Withstand Multichannel Transmission) protocol.
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