tweak

Author: christiankuhtz

articles/virtual-network/nat-gateway-resource.md

@@ -184,9 +184,9 @@ NAT gateways take precedence over outbound scenarios of the subnet. Basic load b
 
 Even without availability zones, NAT is resilient and can survive multiple infrastructure component failures.  Availability zones build on this resiliency with zone isolation scenarios for NAT.
 
-Virtual networks and their subnets are regional constructs.  Subnets arn't restricted to a zone.
+Virtual networks and their subnets are regional constructs.  Subnets aren't restricted to a zone.
 
-A zonal promise for zone isolation exists when a virtual machine instance using a NAT gateway resource is in the same zone as the NAT gateway resource and its public IP addresses. The pattern you want to use for zone isolation is creating a "zonal stack" per availability zone.  This "zonal stack" consists of virtual machine instances, NAT gateway resources, public IP address and/or prefix resources on a subnet that is assumed to be serving only the same zone.   The control plane operations and data plane are then constrained to the specified zone. 
+A zonal promise for zone isolation exists when a virtual machine instance using a NAT gateway resource is in the same zone as the NAT gateway resource and its public IP addresses. The pattern you want to use for zone isolation is creating a "zonal stack" per availability zone.  This "zonal stack" consists of virtual machine instances, NAT gateway resources, public IP address and/or prefix resources on a subnet that is assumed to be serving only the same zone.   The control plane operations and data plane are then alligned with and constrained to the specified zone. 
 
 Failure in a zone other than where your scenario exists is expected to be without impact to NAT. Outbound traffic from virtual machines in the same zone will fail because of zone isolation.