You can check out the following links for more information about the topics that were covered in this chapter:
- Virtual network peering: https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview
- What is a VPN gateway?: https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-about-vpngateways
- Configuring a VNet-to-VNet VPN gateway connection by using the Azure portal: https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-vnet-vnet-resource-manager-portal