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Service Set Identifier

A Service Set Identifier (SSID) is a unique name assigned to a wireless network. It acts as an identifier, helping devices identify and connect to specific networks. SSIDs are essential in wireless networks to distinguish one network from another, facilitating user network selection and aiding network management by separating networks in the same physical area. 

For instance, in an enterprise network, multiple SSIDs can be configured to provide distinct wireless access points: one for employees with secure access, another for contractors with limited access, and a separate SSID for guests with restricted privileges, like internet access only.

SSIDs are mapped to VLANs in wireless networks to segregate and manage network traffic effectively. Each SSID corresponds to a specific VLAN, allowing devices connected to that SSID to belong to the corresponding VLAN. This segregation enhances network security, traffic prioritization, and management.