1 We are providing customized products by developing fine chemical products based on silicone, such as silane, silane coupling agent, silicone intermediate, silicone compound, UV stabilizer of new concept, industrial primer, etc.2  Our company will do our best to develop and provide customer-oriented products in the future.ELCOME TO DAMIPOLYCHEM. 1  We are providing customized products by developing fine chemical products based on silicone, such as silane, silane coupling agent, silicone intermediate, silicone compound, UV stabilizer of new concept, industrial primer, etc.
A collapsed backbone is a type of network structure or configuration that is sometimes used in the creation of local area networks or LANs.The configuration often includes the use of switching or routing hubs as part of the overall design, with a central point of origin providing the feed for all the hubs. collapsed backbone is a type of network structure or configuration that is sometimes used in the creation of local area networks or LANs.
As the redundant uplink introduces a loop in the physical topology of the network, the Spanning-Tree Algorithm (STA) blocks it. In the event of failure of the primary uplink to core switch D1, the STP recalculates and eventually unblocks the second uplink to switch D2, therefore it restores connectivity.