A packet sniffer is a tool used to intercept and analyze network traffic. There are several other terms that can be used interchangeably with packet sniffer, including network analyzer, protocol analyzer, and network sniffer. These tools allow network administrators and security professionals to monitor network traffic, troubleshoot network issues, and identify potential security threats. Other related terms may include traffic analyzer, packet analyzer, and network monitor. Regardless of the terminology used, these tools provide valuable insights into network traffic patterns, which can be used to optimize network performance and improve overall security posture.