In the network equipment of large companies, switches are an indispensable device. Maybe there are still many people who don't know what the role of the switch is. What is the role of the switch? What are the functions of the switch ? The following decoration home decoration network Xiaobian will give you detailed answers for your reference.
What is the role of the switch?
The main functions of the switch include physical addressing, network topology, error checking, frame sequence, and flow control. At present, the switch also has some new functions, such as support for VLAN (Virtual Local Area Network), support for link aggregation, and even some firewalls.
Learning: The Ethernet switch knows the MAC address of the device connected to each port , and maps the address to the corresponding port and stores it in the MAC address table in the switch cache .
Forward / Filter: When the destination address of a data frame is mapped in the MAC address table, it is forwarded to the port connected to the destination node instead of all ports (if the data frame is a broadcast / multicast frame, it is forwarded to all ports) .
Eliminate loops: When the switch includes a redundant loop, the Ethernet switch avoids loop generation through the spanning tree protocol, while allowing the existence of a backup path.
In addition to being able to connect to the same type of network, switches can also interconnect between different types of networks, such as Ethernet and Fast Ethernet. Many switches today offer high-speed ports that support Fast Ethernet or FDDI to connect to other switches in the network or to provide additional bandwidth for critical servers with large bandwidth.
In general, each port of the switch is used to connect to a separate network segment, but sometimes in order to provide faster access speed, we can connect some important network computers directly to the ports of the switch. In this way, the network's key servers and important users have faster access speeds and support greater traffic.
What are the functions of the switch?
1. Like a hub, the switch provides a large number of ports for cable connections, which allows for star topology routing.
2. Like repeaters, hubs, and bridges, when it forwards a frame, the switch regenerates an undistorted square electrical signal.
3. Like a bridge, the switch uses the same forwarding or filtering logic on each port.
4. Like a bridge, a switch divides a LAN into multiple collision domains. Each collision domain has an independent broadband, thus greatly increasing the bandwidth of the LAN.
5. In addition to having the role of bridges, hubs, and repeaters, the switch provides more advanced features such as virtual local area networks ( VLANs ) and higher performance.
The above is what Xiaobian brings to you. What is the role of the switch? What are the functions of the switch? I believe that everyone has a basic understanding of the role of the switch after reading this article, if you want to know more about the decoration consultation, please click to enter the decoration knowledge channel .
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