Wireless network designers and engineers must fully understand the concept of Service Set Identifiers (SSIDs). This concept defines an identifier for the logical wireless LAN and is similar in some ways to the concept of Ethernet VLANs, which define who can communicate in a LAN based on the broadcast domain. With WLANs, everyone is in the same collision and broadcast domains so stations can receive everyone’s traffic. This situation generated the need for SSIDs that logically split WLANs. Two devices that are in different SSIDs will ignore each other’s traffic, but this does not affect the collision domain . . .
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