Is DPN like a VPN?

Excuse me, but I'm a bit confused about the similarities and differences between DPN and VPN. Could you please elaborate on whether DPN is akin to a VPN in terms of its functionality and purpose? I'm interested to know if they both offer similar levels of privacy and security, or if there are key distinctions that set them apart. Additionally, I'd appreciate it if you could provide some examples or use cases to further clarify the differences, if any. Thank you for your time and expertise.