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Scapy is an interactive packet manipulation utility designed to help you manage everything related to the network. More precisely, the tool is capable of forging or decoding packets of a wide number of protocols, sending, capturing, storing and reading them via pcap files. At the same time, the utility can match requests and replies and can be easily used for classical tasks, such as scanning, tracerouting, unit tests, probing or simulating network attacks.

It is worth mentioning that the tool can be used as a library as well as a shell to interact with the network. In order to use it as shell command, the tool requires root privileges because otherwise it is not able to send the packets. As you probably hinted, you need to open Command Prompt with administrator privileges and make sure that you have all necessary packages installed. Nevertheless, the app informs you about the features you need to install, in case you are missing some.

The tool is quite impressive with decoding packets and, according to the developer, the app attempts to provide you with all the information it receives. Unlike other packets decoders, the tool comes with a flexible model that does a good job at avoiding subjective limitations, the most common being the apps that provide the developer's vision on what packets you can receive.