In PRTG Network Monitor, there isn't a specific "Bandwidth Monitor Sensor" by name, but bandwidth monitoring is a core capability provided by various sensor types. Here are some common usages and configurations for bandwidth monitoring in PRTG:

1. SNMP Traffic Sensor: The SNMP Traffic sensor is one of the most common sensors used for bandwidth monitoring. It monitors the traffic on network interfaces of SNMP-enabled devices such as routers, switches, and firewalls. You can monitor both inbound and outbound traffic, track bandwidth usage trends, and set up alerts for bandwidth thresholds.

2. NetFlow Sensor: The NetFlow sensor collects and analyzes flow data exported by routers and switches to monitor bandwidth usage at a more granular level. It provides insights into the types of traffic traversing the network, including top talkers, protocols, and endpoints. NetFlow sensors are useful for identifying bandwidth hogs and optimizing network performance.

3. Packet Sniffer Sensor: The Packet Sniffer sensor captures and analyzes network packets to monitor bandwidth usage and traffic patterns. It offers detailed packet-level visibility into network traffic, including protocol distribution, packet sizes, and conversations. Packet Sniffer sensors are particularly useful for troubleshooting bandwidth issues and detecting anomalies.

4. WMI Traffic Sensor: The WMI Traffic sensor monitors bandwidth usage on Windows-based systems using Windows Management Instrumentation (WMI). It tracks network traffic statistics such as bytes sent and received, packet counts, and error rates on network interfaces of Windows servers and workstations.

5. sFlow Sensor: Like NetFlow, the sFlow sensor collects flow data to monitor bandwidth usage and analyze network traffic patterns. It supports sFlow-enabled devices and provides visibility into network traffic at the interface level, helping to optimize bandwidth allocation and detect anomalies.

6. HTTP Advanced Sensor: While primarily used for web monitoring, the HTTP Advanced sensor can also measure bandwidth usage for web applications and services. It monitors the response times of HTTP requests and can be configured to calculate transfer rates, providing insights into bandwidth consumption by web traffic.

7. Custom SNMP Sensors: PRTG allows you to create custom SNMP sensors to monitor specific aspects of network devices and systems. You can use custom SNMP sensors to collect bandwidth-related metrics not covered by built-in sensor types, providing flexibility for tailored bandwidth monitoring solutions.

By leveraging these sensor types and their configurations, you can effectively monitor bandwidth usage across your network infrastructure, identify performance bottlenecks, optimize resource allocation, and ensure the efficient operation of your network.