An engineer seeks a solution to retrieve routing information from Cisco Nexus switches. The data must be exported to a web application in a JSON or XML data format for monitoring and must be encrypted

Streaming telemetry is designed for continuous, high-volume data collection using push mechanisms, which might be more complex and comprehensive than what is required for simple, on-demand routing information retrieval for a web application.

Cisco Tetration is a full-fledged data center security and analytics platform, offering far more extensive capabilities than merely retrieving routing information and requiring significantly more implementation and operational knowledge.

NX-API provides a direct RESTful or RPC programmatic interface to Cisco Nexus devices, allowing retrieval of routing information in JSON or XML format over HTTPS for encryption. Its design prioritizes simplicity for device interaction and automation, making it straightforward to implement for specific data retrieval tasks without requiring extensive knowledge or complex platforms.

Python scripts are a means of implementation, but the question asks for the underlying technology that accomplishes the goals; a Python script would utilize a library (like 'requests' for NX-API) to interact with the chosen technology.