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# kSCPropNetInterfaceSubType

The Interface key `SubType`, whose value is of type `CFString`.

```
let kSCPropNetInterfaceSubType: CFString
```

## Discussion

This key can be passed the following constants when the `Type` key has the value `PPP`:

- `kSCValNetInterfaceSubTypePPPoE`, which has the value `PPPoE`
- `kSCValNetInterfaceSubTypePPPSerial`, which has the value `PPPSerial`
- `kSCValNetInterfaceSubTypePPTP`, which has the value `PPTP`
- `kSCValNetInterfaceSubTypeL2TP`, which has the value `L2TP`

---

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