You need low-cost connectivity for a 24-hour test from a Compute Engine VM to on-prem servers using private IPs, with no Interconnect provisioned. Which connectivity method do you choose?

Cloud VPN is the most suitable choice for low-cost, temporary connectivity using private IPs. It establishes an IPsec VPN tunnel over the public internet, making it quick to set up and cost-effective for short-term needs like a 24-hour test. Partner VLAN attachment and Dedicated Interconnect both provide higher bandwidth and more reliable private connectivity but require significant setup time and cost, making them impractical for a short, low-cost test. Dedicated Interconnect without any VLAN attachments provides no actual connectivity.