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# SCNetworkInterfaceCopyMediaSubTypes(_:)

Returns a list of available media subtypes for the specified interface configuration options.

```
func SCNetworkInterfaceCopyMediaSubTypes(_ available: CFArray) -> CFArray?
```

## Parameters

`available`

The available options as returned by the [`SCNetworkInterfaceCopyMediaOptions(_:_:_:_:_:)`](/documentation/SystemConfiguration/SCNetworkInterfaceCopyMediaOptions(_:_:_:_:_:)) function.

## Return Value

An array of available media subtypes (for example, 10BaseT/UTP, 100baseTX, etc), or `NULL` if no subtypes are available

## Discussion

---

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