You've captured network traffic using Wireshark and noticed many ARP requests. Which filter will display only ARP packets?

1. Understanding ARP Packets

ARP (Address Resolution Protocol) is used for mapping an IP address to a physical machine address (MAC address) that is recognized in the local network. If you've captured network traffic and want to focus on ARP packets, you need a specific display filter in Wireshark.

2. Using the Appropriate Filter

Wireshark provides powerful filtering options to sift through large amounts of data. To filter and display only ARP packets, you can use a simple filter.

3. ARP Filter Command

In the Wireshark filter input box, enter the following filter:

arp

This command will show only the ARP packets in your captured traffic, excluding all other protocols.

4. Summary

In summary, by entering arp in the display filter, you will effectively limit the view to only ARP packets, allowing for easier analysis of the ARP traffic. This can be particularly useful for diagnosing network issues related to IP address resolution.