Several exchange methods of the switch

September 23 21:00:18, 2024

Cut Through
A straight-through Ethernet switch can be understood as a line matrix telephone switch that crosses between ports. When it detects a packet on the input port, it checks the packet header of the packet, obtains the destination address of the packet, starts the internal dynamic lookup table and converts it into the corresponding output port, connects it at the intersection of the input and output, and passes the packet to the packet. The corresponding port implements the switching function. Since it is not needed, the delay is very small and the exchange is very fast, which is its advantage. Its disadvantage is that because the contents of the packet are not stored and stored by the Ethernet switch, it is impossible to check whether the transmitted packet is incorrect or not, and cannot provide error detection capability. Since there is no buffer, it is not possible to directly connect input/output ports with different rates, and it is easy to drop packets.
Store & Forward
The store-and-forward method is the most widely used method in the field of computer networks. It checks the packet of the input port, takes out the destination address of the packet after processing the error packet, and converts it into an output port through the lookup table to send the packet. For this reason, the store-and-forward method has a large delay in data processing, which is its deficiency, but it can detect errors in packets entering the switch and effectively improve network performance. Especially important is that it can support the conversion between ports of different speeds, keeping the high-speed port and low-speed port work together.
Fragment Free
This is a solution between the first two. It checks if the length of the packet is 64 bytes. If it is less than 64 bytes, it is a fake packet, the packet is discarded; if it is larger than 64 bytes, the packet is sent. This method also does not provide data verification. Its data processing speed is faster than the store-and-forward method, but slower than the straight-through.

N95/KN95 Mask Machine

HTD is a professional machinery manufacturer with more than 15 years. Since its establishment, we have been adhering to the core of user needs, and have been providing stable quality equipment, raw materials, and thoughtful after-sales service to customers in more than 30 countries and regions around the world, winning the trust of customers and praise from many companies.
Our main products are:fully automatic medical Mask machine,fully automatic 2D folding mask machine like KN95 mask making machine and N95 mask making machine,3D mask making machine like the fully automatic Cup Mask Machine,disposable 3ply flat face mak machine,KF94 fish type mask making machine and others non-woven fabrics products and raw materials,spare parts and so on.


The fully automatic KN95 N95 folding face mask making machine is a fully automatic machine for producing folding mask production lines. It uses ultrasonic technology to fuse 3 to 6 layers of PP non-woven fabrics, activated carbon and filter materials, non-woven fabrics, ear bands, printing, half-folding, edge-sealing, and roll cutting. It can also process 3M 9001, 9002 and other folding masks. Depending on the raw materials used, the produced masks can reach different standards such as FFP1, FFP2, N95, etc., without manual operation, all are produced by mechanization.
This machine is an all-in-one machine of automatic three-dimensional folding mask. From the feeding of cloth to the completion of automation of finished products, including (upper bridge strip, printing), spot welding of elastic belt, folding, forming, welding and cutting of finished products, waste removal, and finished product output, the automatic production on a machine is fully realized. (The whole machine only needs one person to operate).


Through our unremitting efforts and continuous research and development, we provide customers with labor-saving, efficient and stable automated production equipment,We offer free consulting, can strongly supply the mask materials and machine efficient after-sales service in One-stop service.All of our products have CE and test reports.

We can be your reliable business partner!



N95 Medical Mask Making Machine,N95 Folding Dust Mask Making Machine,Automatic Medical Mask N95 Folding Nonwoven Machine,Respirator N95 Folding Elastic Earband Mask Machine,Kn95 N95 Ffp2 Fold Face Mask Machine

GUANGZHOU HTD INTERNATIONAL , https://www.htdmask.com