---
title: "applicationProtocols(_:)"
framework: Network
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+, watchOS 27.0+]
path: "network/dtls/applicationprotocols(_:)"
---

# applicationProtocols(_:)

Set application protocols supported by clients of this protocol.

## Declaration

```swift
func applicationProtocols(_ protocols: [String]) -> DTLS
```

## Discussion

Discussion Application layer protocol negotiation (ALPN) tokens describe the application protocol in use above DTLS.