Multi-access Point network configuration: Reliable transmission signal

If there are two or more network access points in an area, how can a device (for example, a notebook) identify signals from these access points?

First, each WiFi device has its own unique physical address that has been set up at the factory and can be reconfigured. For example, a Linksys WiFi 5 Hertz Wireless access point Physical address may be 00:25:9c:57:0c:0f, this address is included in each frame sent by the router, so other wireless devices can distinguish who sent this frame.

Second, each WiFi network has its own name, called the extended Service Set identifier (Essid, often referred to as the SSID). For example, a dual-frequency Linksys access point may have two wireless devices, each with a separate physical address but the same SSID (called Neta), which, in the management frame used to establish the wireless connection, contains the signal sent by the access point, Used to propagate the network they support or to process a client's request for a link to an access point.

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Now, if we want to install another access point next to Neta, notice that we're creating a separate network. To do this, we give the new route a different SSID (such as NetB). A client connected to Neta receives a signal from a previous access point, and the user who needs to connect to NetB will receive the signal from the new access point, so you should change the default SSID access point so that all the Linksys in the world will not conflict, and conflicts can cause accidental connections.

Or, if we want to install a second access point, extend the network. So we're going to give the new access to the same SSID (Neta). The customer is still listening to the Neta outgoing signal, which is now sent along with the new and old access. Each customer identifies the sender's physical address from the strongest signal and processes the request. This creates an intermediary between the client and the "best" access point, although the new and old access is the same SSID, after the mediation is generated, each data frame that is sent contains the physical address of the selected access port, so that the access gate knows that it is responsible for those frames, although other access points may receive these frames, It does not process frames that have not been sent to it.

Note Other factors that affect client access point communication, for example, a user receiving a 2.4 Hertz channel will not receive an access signal from the 5 Hertz channel, although they are in the same area. Therefore, each device must receive the same frequency in order to communicate. Also, the new 802.11 device must select a blending mode so that older 802.11 devices can know what they are listening to. Finally, whenever a client needs to access a new entry, it must meet the incoming data frequency and security requirements, which is why it is so important for all access ports to propagate the same SSID because it can have the same supported data frequencies and security settings. Otherwise, the client may try to connect all the time, but the connection is not correct, but connect to the other access port, causing the connection instability.