Chapter 4. Capturing Live Network Data
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# Chapter 4. Capturing Live Network Data

## 4.1. Introduction

Capturing live network data is one of the major features of Wireshark.

The Wireshark capture engine provides the following features:

- Capture from different kinds of network hardware such as Ethernet or 802.11.
- Simultaneously capture from multiple network interfaces.
- Stop the capture on different triggers such as the amount of captured data, elapsed time, or the number of packets.
- Simultaneously show decoded packets while Wireshark is capturing.
- Filter packets, reducing the amount of data to be captured. See Section 4.10, “Filtering while capturing”.
- Save packets in multiple files while doing a long-term capture, optionally rotating through a fixed number of files (a “ringbuffer”). See Section 4.8, “Capture files and file modes”.

The capture engine still lacks the following features:

- Stop capturing (or perform some other action) depending on the captured data.

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