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Which three of the following statements are true regarding a Wi$-$Fi's service set identifier $($SSID$)?$

An SSID is the Wi$-$Fl$\text{'}$s name.

Most routers transmit the SSID every few seconds so roaming devices can find the fignal.

In home networks, after all legitimate devices have connected to SSID once, transmitting the SSID is unnecessary.

Once an SSID has been established it cannot be changed.