---
title: protocol
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/socketport/protocol
---

# protocol

The protocol that the receiver uses for communication.

## Declaration

```swift
var `protocol`: Int32 { get }
```

## See Also

### Getting Information

- [address](foundation/socketport/address.md)
- [protocolFamily](foundation/socketport/protocolfamily.md)
- [socket](foundation/socketport/socket.md)
- [socketType](foundation/socketport/sockettype.md)