There is also a terminal-based (non-GUI) version called TShark. Wireshark is cross-platform, using the GTK+ widget toolkit in current releases, and Qt in the development version, to implement its user interface, and using pcap to capture packets it runs on GNU/Linux, OS X, BSD, Solaris, some other Unix-like operating systems, and Microsoft Windows. Originally named Ethereal, in May 2006 the project was renamed Wireshark due to trademark issues. It is used for network troubleshooting, analysis, software and communications protocol development, and education. Wireshark is a free and open-source packet analyzer. The packet will be consumed already ND forward ing of braodcast could be stopped ,if another machine before you is an expected reliever of that packet as it's mac match with packet Mac, on wifi side, the router throws the packet in the air, ND devices that come into the range of that packet could recieve it considering the device nic should be developed with intention of listening to monitor mode of each packet broadcasted and for connected wires, router does not need to throw packets in the air, as recieve is connected to router via Ethernet cable. so when ur router broadcast data to ur local private network, ur machine could consume that, but hold on. if you want to listen to the packets broadcasted for a Mac addresses under ur own private network via Ethernet cable, then, it would only be possible, if ur own machine nic could be set to monitoring mode. Basically, ur router seems to be handling a private network of URS. Very tough, untill u do something with ur ehernet cable and router to listen to the air packets broadcasted by access point/another router in range, the conept of monitor mode seems to be compatible with the case where your nic is capable of listening to all broadcasting of destination Mac address ND its associated packet.

Wireshark promiscuous mode wired