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# nw_relay_hop_t

A single relay server you can chain together with other servers.

```
typealias nw_relay_hop_t = any OS_nw_relay_hop
```

## Discussion

Relay servers are secure HTTP proxies that allow proxying TCP traffic using the `CONNECT` method and UDP traffic using the `connect-udp` protocol defined in [RFC 9298](https://www.rfc-editor.org/rfc/rfc9298.html).

## Topics

### Configuring Relay Hops

[`nw_relay_hop_create(_:_:_:)`](/documentation/Network/nw_relay_hop_create(_:_:_:))

Creates a configuration for a secure relay accessible using HTTP/3, with an optional HTTP/2 fallback.

[`nw_relay_hop_add_additional_http_header_field(_:_:_:)`](/documentation/Network/nw_relay_hop_add_additional_http_header_field(_:_:_:))

Adds an HTTP header name and value pair to send as part of `CONNECT` requests to the relay.


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