Generally, the network card is installed on a computer or server, and communicates with another computer, server or other network equipment through the network. According to different application fields of network cards, we can divide them into computer network cards and server network cards. Generally, a computer can use one network card, but for servers, multiple network cards need to be used to meet the needs of processing more network traffic. Generally, computer network cards have only one network interface, while server network cards have multiple network interfaces, such as dual ports and four ports.

Network cards can also be divided into wired network cards and wireless network cards. Among them, wireless network cards use wireless technology to access the network, while wired network cards need to use DAC cables or AOC active optical cables or optical modules to connect with fiber patch cord. The following ETU-LINK will focus on introducing the 25G server network card and connection solution.

The 25G server network card, also known as the optical fiber network card, is a printed circuit board that can provide network communication functions for the computer. It is usually used as a separate network adapter and inserted into the motherboard slot of the server. The 25G fiber optic network card has ports on the side panel, which are mainly used to insert optical modules to connect to the switch. Generally, 25G fiber optic network cards have one port, but there are also two or more 25G fiber optic network cards with more ports. As we all know, 40G is in a network transition period. Because the bandwidth of 40G optical fiber network card is too large for the server, and the cost is high, the 25G optical fiber network card is more in line with the requirements of the server than the 40G optical fiber network card.

25G optical fiber network card matching solution:

The above is the 25G optical fiber network card and transmission connection scheme introduced by ETU-LINK. The application of 25G server has promoted the development of 25G optical fiber network card. Compared with 10G, 25G allows larger bandwidth to be transmitted on single-core copper wire or optical fiber. Therefore, 25G can achieve 100G network upgrade through only four channels (10G needs to achieve 100G through ten channels), which can effectively save a lot of money Space and cost. At the same time, the bandwidth of 25G is 2.5 times that of 10G, while the price of 25G fiber optic network card is less than 2.5 times that of 10G fiber optic network card. Therefore, 25G fiber optic network card is more cost-effective. The greater bandwidth of the 25G optical fiber network card meets the network requirements of high-performance computing clusters. In the network upgrade of 100G or higher speed, the 25G optical fiber network card will be one of the indispensable infrastructures.