What is the recommended solution for fixing a MongoServerSelectionError in a Node.js application?

Adding your IP address in the Network Access panel is essential for resolving a MongoServerSelectionError, especially when using MongoDB Atlas or similar services that require specific IP whitelisting for security reasons. When your Node.js application tries to connect to the MongoDB server, it checks if the connecting IP is permitted to access the database. If the IP is not whitelisted, the connection will be rejected, leading to the error.

By properly configuring the Network Access settings and ensuring that your application's IP address is allowed, you enable a successful connection to the MongoDB server. This step addresses the underlying issue by ensuring that the database recognizes the connecting application as a trusted source.

The other options, while they may seem plausible for different contexts or issues, do not directly address the permissions and access control that lead to the MongoServerSelectionError in this scenario. Adjustments to timeout settings, using a different server, or changing the database name may resolve other types of errors, but they do not resolve the specific access restriction imposed by the network settings.