What is a use of TCPdump?

TCPdump is a command-line packet analyzer used to capture and inspect network packets. As described in the study guide, "tcpdump is a command-line interface tool that is used to capture packets on a network. It is a very powerful and popular network protocol analyzer". The tool allows cybersecurity professionals to analyze headers and payloads of network traffic, making it valuable in forensic investigations and network diagnostics.