ADB: Android Debug Bridge
ADBD: Android Debug Bridge Daemon, Target Service.
ADBS: Android Debug Bridge Server, Host.
ADBC: Android Debug Bridge Client, Host Service.
ADBC---TCP/IP---ADBS(127.0.0.1:5037)---/dev/usb/...---USB---/dev/android_adb---ADBD
---TCP/IP---USB---TCPIP---ADBD(0.0.0.0:5555)