APRS (Automatic Packet Reporting System) does NOT support which one of these functions?

APRS (Automatic Packet Reporting System) is a versatile tactical communication protocol used by amateur radio operators to broadcast local, real-time information. It natively supports telemetry, two-way messaging, weather reporting, and broadcasting local announcements to all stations in the network. However, APRS operates using unconnected, unacknowledged UI (Unnumbered Information) frames in a connectionless broadcast manner. It does not establish dedicated, end-to-end connected links between stations like standard AX.25 packet BBS operations do. Therefore, 'Automatic link establishment' (ALE) is not a feature of APRS. ALE is a protocol typically used in HF communications to automatically select the optimal frequency and establish a point-to-point connection, which contradicts the fundamentally connectionless broadcast nature of APRS.