# pong(_:metadata:) Send a pong frame on a connection. ``` func pong(_ content: Content? = nil, @ProtocolMetadataBuilder metadata builder: () -> [NWProtocolMetadata] = {[]}) async throws where Content : DataProtocol ``` ## Parameters `content` Optional pong data. `builder` A builder for specifying metadata about the content to send. ## Discussion This may be called before the connection is ready, in which case the send will be enqueued until the connection is ready to send. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)