---
title: "maximumSegmentSize(_:)"
framework: network
role: symbol
role_heading: Instance Method
path: "network/tcp/maximumsegmentsize(_:)"
---

# maximumSegmentSize(_:)

Set maximum segment size.

## Declaration

```swift
func maximumSegmentSize(_ bytes: UInt32) -> TCP
```

## Parameters

- `bytes`: The maximum segment size in bytes.

## Discussion

Discussion The maximum segment size in bytes (TCP_MAXSEG).