Detailed explanation of wireless bridges and wireless devices

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Wireless bridges and wireless networks popularize wireless device applications. Most people know about wireless network related knowledge incompletely. Here, Soode Wireless helps you learn more about wireless networks and wireless devices.

What is a wireless network? A wireless network is a wireless local area network (wlan) that uses radio waves as a medium for information transmission. It is similar to the use of wired networks. The biggest difference lies in the difference in transmission media, and the use of radio technology to replace network cables. It is possible to backup each other and the wired network.

b. What are the common standards for commonly used wireless standards?

Ieee802.11a: Use 5GHz frequency band, transmission speed 54mbps, incompatible with 802.11b ieee802.11b: use 2.4ghz frequency band, transmission speed 11mbps

Ieee802.11g: Uses 2.4ghz band, transmission speed 54mbps, backward compatible with 802.11b

At present, ieee802.11b is most commonly used, but ieee802.11g is more powerful than the next-generation standard. c. What is a bridge high-power wireless bridge that connects two similar networks and manages the flow of network data. It works at the data link layer, not only can expand the distance or range of the network, but also can improve the performance, reliability and security of the network.

The wireless bridge is like a clever repeater. Repeaters receive signals from a network cable, amplify them, and send them to the next cable. They do this without any purpose, and they do not care about the content of the messages they forward. In comparison, bridges are more sensitive to the information uploaded from the level.

The bridge works at the data link layer. Connecting two LANs and forwarding frames based on the MAC address can be considered as a "lower router" (the router works at the network layer and forwards according to the network address such as the IP address).

Remote bridges connect two remote LANs via a typically slower link (such as a telephone line), where performance is more important for a local bridge, and longer distances are better for remote bridges. important.

d. What is the switch The switch is the hub device of the master network system. Most of the switches are operating at the data link layer (layer 2) of the OSI reference model.

If you think of a hub as a built-in Ethernet bus, the switch can be thought of as an interconnected system with multiple buses forming a switching matrix. Each switch port corresponds to a backplane bandwidth bus (CoreBus) that is an order of magnitude higher. The backplane bus is connected to a switching engine (SwitchEngining). Data packets between different ports enter the switching engine through the backplane bus, and are exchanged through the store-and-forward, pass-through, and collimated-through modes.

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