Standard load balancer and standard public IP introduce abilities and different behaviors to outbound connectivity. They aren't the same as basic SKUs. If you want outbound connectivity with standard SKUs, you must explicitly define it either with standard public IP addresses or a standard public load balancer. Standard internal load balancer must have outbound connectivity defined. It's recommended you always use outbound rules on a standard public load balancer. When an internal standard load balancer is used, you must take steps to create outbound connectivity for the VMs in the backend pool if outbound connectivity is desired. In the context of outbound connectivity, a single standalone VM, all the VMs in an Availability Set, all the instances in a Virtual Machine Scale Set behave as a group. If a single VM in an Availability Set is associated with a standard SKU, all VM instances within this Availability Set now behave by the same rules as if they're associated with standard SKU even if an individual instance isn't directly associated with it. This behavior is also observed in a standalone VM with multiple network interface cards attached to a load balancer. If one NIC is added as a standalone, it has the same behavior. Review this entire document to understand the overall concepts, review [Standard Load Balancer](./load-balancer-overview.md) for differences between SKUs, and review [outbound rules](load-balancer-outbound-connections.md#outboundrules).
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