What is the method for configuring the number of Kafka connections?

In Kafka, the configuration of the number of connections is done through the properties on the broker side. There are two important properties in Kafka used to configure the number of connections: 1. The `listeners` attribute, which specifies the address and port that the Kafka broker listens on. You can support multiple connections by setting multiple addresses and ports. For example, you can set `listeners=PLAINTEXT://localhost:9092,PLAINTEXT://localhost:9093` to listen on two ports. 2. The `num.network.threads` attribute, which specifies the number of threads that the Kafka broker uses to handle network requests. These threads are responsible for handling client connections and requests. The default value is 3, but you can adjust this value as needed by modifying the Kafka broker’s configuration file. The configuration file is usually `server.properties`, where you can find the relevant properties to modify. Once you have made the changes, you will need to restart the Kafka broker for the configuration to take effect.