Libpcap and Npcap provide that packet capture capabilities that are central to Wireshark’s core functionality.
If this library isn’t already installed or available as a package for your platform, you can get it at http://www.tcpdump.org/.
You can download the Npcap Windows packet capture library manually from https://nmap.org/npcap/.
|Npcap has its own license with its own restrictions|
Insecure.Com LLC, aka “The Nmap Project” has granted the Wireshark Foundation the right to include Npcap with the installers that we distribute from wireshark.org. If you wish to distribute your own Wireshark installer or any other package that includes Npcap you must comply with the Npcap license and may be required to purchase a redistribution license. Please see https://nmap.org/npcap/ for more details.