# MulticastOption

`import { MulticastOption } from "destack:net/binding";`

UDP multicast option key.

```ds title="MulticastOption"
export enum MulticastOption {
    Loopback = 1,
    HopLimit = 2,
    Interface = 3,
}
```

[language/library/src/net/binding/udp.ds:53:60](https://github.com/destack-sh/destack/blob/main/language/library/src/net/binding/udp.ds#L53-L60)

## Variants

### `Loopback = 1`

Multicast loopback.

### `HopLimit = 2`

Multicast time-to-live or hop limit.

### `Interface = 3`

Default multicast interface.