Final answer:
To meet the requirement of private networking connectivity with low latency and high speeds between on-premises and AWS, a combination of VPN and Direct Connect is recommended, beginning with VPN for immediate setup and transitioning to Direct Connect for a longer-term solution.
Step-by-step explanation:
The best solution for providing low latency and high speeds for private networking connectivity between a single on-premises location and AWS, especially with a requirement to be operational within 4 days, is VPN + Direct Connect. AWS Direct Connect provides a dedicated network connection between your premises and AWS, which is great for low latency and high bandwidth needs. However, setting up Direct Connect can take longer than the specified 4 days, especially in semi-rural locations. Therefore, starting with a VPN connection can be a quick solution while awaiting the establishment of a Direct Connect link. A VPN can be set up relatively quickly and would suffice in the interim. Once Direct Connect has been established, traffic can be switched over from the VPN for a more stable and faster connection.