In the past, many hardware components in computers required additional installations. Especially, some components that were not included as standard in computers had to be added later. The Ethernet card is one of the products that used to be installed additionally. However, today, the Ethernet card is included as standard in most devices.
The role of the Ethernet card is to provide the necessary connection for communication in computer networks. The Ethernet card is located in the area where the motherboard is. It is mounted in the expansion slots of the motherboard.
In laptops, the Ethernet card is usually inserted into the PC card slot. The Ethernet card is not known by just one name. Nowadays, this card is also known as a network interface card or network adapter.
The ports of Ethernet cards have various connection points. Using these connection points, information from the computer can be transmitted via cable to other computers. Additionally, through the same ports, information can be transmitted directly to shared devices.
Generally, all Ethernet cards are sold with a unique serial number. Due to this serial number, all Ethernet cards can be distinguished from each other. The serial numbers on Ethernet cards are called MAC addresses.
The Ethernet card allows easy access to the internet for desktop and laptop computers, providing practical use. Ethernet cards can be used immediately after installation. Since these cards have a plug-and-play system, no additional operations are necessary.
How does the Ethernet card work?
The Ethernet card works by dividing data into packets for processing. It transmits the received information to the network output cable, thus initiating communication. In the process of data transfer through the Ethernet card, three important details are required: the sender’s MAC address, the receiver’s MAC address, and finally, the transmitted data along with the CRC code.
The CRC code is used to check whether the transmitted data has been corrupted or not. Before sending the data, the cable in the port is checked; if it is free, the data transfer is carried out. The data sent to the receiving computer reaches its Ethernet card, where it is decrypted. If the received CRC code matches, the data is accepted and processed. If the CRC code does not match, the received data is rejected and returned.
