Is there a Wi-Fi traffic sniffer?

Question

WiFi

Hello, tell me please, is it possible to scan the traffic of your WiFi network if you know the key, (WPA2 authorization)? For some reason, the TCPDUMP command only shows the network bacon and does not show pacts between clients and APs.
Is the encryption key common for all devices on the same AP or is it unique for each pair of AP-Clients?

Answer 1

wireshark, can view the dump, you need an identification protocol (handshake) and a password,

Answer 2

airdump
Requires a network card that supports MONITOR mode.