Product Name	Relationship with VPN connection
VPC	VPN connection is a way to connect your peer IDC and VPC through a public network encrypted channel.
DC	If your business is sensitive to latency and jitter, you are recommended to connect with the VPC through Direct Connect.
Routing table	You need to add a routing policy pointing to the IPsec VPN gateway in the routing table associated with the subnet so that network requests can be transmitted to the customer gateway through the VPN channel.