Network monitoring tools are software applications designed to oversee and manage computer networks. They help network administrators track performance, detect issues, and ensure that all devices are functioning properly. By providing real-time data on network traffic, these tools can identify bottlenecks, outages, and security threats, allowing for quick responses to potential problems. These tools often include features like bandwidth monitoring, device discovery, and alerting systems. Popular examples of network monitoring tools include Nagios, Zabbix, and SolarWinds. By using these tools, organizations can maintain optimal network performance and enhance overall security.