packet capture
A recording of the packets that crossed a network interface, so you can inspect them later.
A packet capture records frames seen by an interface (with tools such as Wireshark or tcpdump) for decoding layer by layer; you capture only networks and devices you own or are authorized to inspect.
Examples
Running Wireshark or tcpdump on your own laptop records the sensor's traffic to a
.pcapngfile you can inspect later.A capture filtered to
host 192.168.1.37keeps only the greenhouse sensor's packets, such as its DNS query to port 53.
See also