---
title: maximumSegmentSize
framework: network
role: symbol
role_heading: Instance Property
path: network/nwprotocoltcp/options/maximumsegmentsize
---

# maximumSegmentSize

TCP’s maximum segment size in bytes.

## Declaration

```swift
var maximumSegmentSize: Int { get set }
```

## See Also

### Customizing TCP Options

- [init()](network/nwprotocoltcp/options/init().md)
- [enableFastOpen](network/nwprotocoltcp/options/enablefastopen.md)
- [noDelay](network/nwprotocoltcp/options/nodelay.md)
- [noOptions](network/nwprotocoltcp/options/nooptions.md)
- [noPush](network/nwprotocoltcp/options/nopush.md)
- [retransmitFinDrop](network/nwprotocoltcp/options/retransmitfindrop.md)
- [disableAckStretching](network/nwprotocoltcp/options/disableackstretching.md)
- [disableECN](network/nwprotocoltcp/options/disableecn.md)