# Advanced Topics - [Locks](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/locks.md): Learn about different transaction locks in NSO and their interactions. - [CDB Persistence](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/cdb-persistence.md): Select the optimal CDB persistence mode for your use case. - [IPC Connection](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/ipc-connection.md): Connect client libraries to NSO with IPC. - [Cryptographic Keys](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/cryptographic-keys.md): Store strings in NSO that are encrypted and decrypted using cryptographic keys. - [Service Manager Restart](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/restart-strategies-for-service-manager.md): Restart strategy for the service manager. - [IPv6 on Northbound Interfaces](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/ipv6-on-northbound-interfaces.md): Learn about using IPv6 on NSO's northbound interfaces. - [Layered Service Architecture](https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics/layered-service-architecture.md): Design large and scalable NSO applications using LSA. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://nso-docs.cisco.com/guides/nso-6.5/administration/advanced-topics.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.