Packet analysis is the process of capturing and examining data packets that travel across a network. Each packet contains information such as the source and destination addresses, as well as the data being transmitted. By analyzing these packets, network administrators can troubleshoot issues, monitor network performance, and ensure security by identifying unauthorized access or malicious activity. Tools like Wireshark are commonly used for packet analysis, allowing users to visualize and interpret the data. This practice is essential for maintaining the integrity and efficiency of networks, as it helps in understanding traffic patterns and optimizing resource allocation.