The shape represents the spectral signature of the physical layer and modulation type supported by a wireless network. A "parabolic" shape is used to denote HR-DSSS BPSK (High-Rate Direct [...]
"Solid" lines represent infrastructure or managed networks, while "dashed" lines represent ad-hoc networks, also known as computer-to-computer networks.
No. WiFi Explorer is required to use CoreWLAN, Apple's official framework for Wi-Fi scanning, and this framework does not recognize external wireless adapters. Support for externals Wi-Fi adapters is [...]