# ApplicationProtocolVersion

Load balancing protocol version for application load balancers.

- Source: [`aws-elasticloadbalancingv2/lib/shared/enums.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-elasticloadbalancingv2/lib/shared/enums.ts#L74)

## Example

```ts
declare const vpc: ec2.Vpc;

const tg = new elbv2.ApplicationTargetGroup(this, 'TG', {
  targetType: elbv2.TargetType.IP,
  port: 50051,
  protocol: elbv2.ApplicationProtocol.HTTP,
  protocolVersion: elbv2.ApplicationProtocolVersion.GRPC,
  healthCheck: {
    enabled: true,
    healthyGrpcCodes: '0-99',
  },
  vpc,
});
```

## Members

| Member | Description |
| --- | --- |
| `GRPC` | GRPC. |
| `HTTP1` | HTTP1. |
| `HTTP2` | HTTP2. |

## Referenced by

- [`AddApplicationTargetsProps`](/v2/docs/aws-cdk-lib.aws_elasticloadbalancingv2.AddApplicationTargetsProps).protocolVersion
- [`ApplicationLoadBalancedServiceBaseProps`](/v2/docs/aws-cdk-lib.aws_ecs_patterns.ApplicationLoadBalancedServiceBaseProps).protocolVersion
- [`ApplicationTargetGroupProps`](/v2/docs/aws-cdk-lib.aws_elasticloadbalancingv2.ApplicationTargetGroupProps).protocolVersion