You have an Azure virtual machine named VM1 that connects to a virtual network named VNet1. VM1 has the following configuration: Subnet: 10.0.0.0/24 Availability set: AVSet Network security group (NSG): None Private IP address: 10.0.0.4 (dynamic) Public IP address: 40.90.219.6 (dynamic) You deploy a standard, Internet-facing load balancer named slb1. You need to configure slb1 to allow connectivity to VM1. You need to apply changes to VM1 as you configure slb1. “Before you can connect to VM1 from slb1, you must______________________.”