- Standard Load Balancer and Standard Public IP introduces abilities and different behaviors to outbound connectivity. They are not the same as Basic SKUs. If you want outbound connectivity when working with Standard SKUs, you must explicitly define it either with Standard Public IP addresses or Standard public Load Balancer. This includes creating outbound connectivity when using an internal Standard Load Balancer. We recommend you always use outbound rules on a Standard public Load Balancer. That means when an internal Standard Load Balancer is used, you need to 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 VM's in an Availability Set, all the instances in a virtual machine scale set behave as a group. This means, 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 are associated with Standard SKU, even if an individual instance is not directly associated with it. This behavior is also observed in the case of a standalone VM with multiple network interface cards attached to a load balancer. If one NIC is added as a standalone, it will have the same behavior. Carefully 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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