Bridge is an early two-port Layer 2 network device. The two ports of the bridge each have an independent switching channel, instead of sharing a backplane bus, the conflict domain can be isolated. The bridge has better performance than the hub, and each port on the hub shares the same backplane bus. Later, the bridge was replaced by a switch that had more ports and could also isolate the conflict domain.
Bridge is like a smart repeater. Repeaters receive signals from one network cable, amplify them, and send them to the next cable. In comparison, the bridge is more sensitive to the information uploaded from the level. Bridge is a technology for forwarding frames, which can be divided into blocks according to MAC to isolate collisions. The bridge connects multiple segments of the network at the data link layer.
Bridge, also called bridge, is a storage/forwarding device that connects two LANs. It can divide a large LAN into multiple network segments, or interconnect two or more LANs into a logical LAN, so that the LAN can be All users of can access the server.
A common way to extend a LAN is to use a bridge. A simple bridge has two ports, and a more complex bridge can have more ports. Each port of the bridge is connected to a network segment.
Basic characteristics of bridges
1. The bridge realizes LAN interconnection on the data link layer;
2. The bridge can interconnect two networks with different transmission media and different transmission rates;
3. The bridge realizes the communication between interconnected networks by receiving, storing, address filtering and forwarding;
4. The networks that need to be interconnected by the bridge use the same protocol above the data link layer;
5. The bridge can separate the traffic between the two networks, which is beneficial to improve the performance and security of the interconnection network.
Advantages of bridge
1. Filter traffic. The network bridge can be used on a network segment of the local area network. The amount of information between the workstations is limited to this network segment, and will not slip to other network segments through the network bridge.
2. Expand the physical range and increase the maximum number of workstations on the entire LAN.
3. Different physical layers can be used and different local area networks can be interconnected.
4. Improved reliability. If the larger LAN is divided into several smaller LANs, and the amount of information within each small LAN is significantly higher than the amount of information between the networks, then the performance of the entire interconnection network becomes better.
Mosfet Heatsink
A heat sink is a device that incorporates a fan or another mechanism to reduce the temperature of a hardware component (e.g., processor). There are two heat sink types: active and passive. The picture is an example of a heat sink with both active and passive cooling mechanisms.
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The material used partly determines the extent of thermal conductivity. Copper and aluminum are the most widely used materials, though aluminum is the more common choice because copper is more expensive and heavier. Aluminum 6061 and 6063 are widely used with a thermal resistance of 166 and 201 W / mK, respectively.