Wireshark · Wireshark-users: Re: [Wireshark-users] DNS Request in Traceroute

["Luis EG Ontanon" <luis.ontanon@xxxxxxxxx>]

The traceroute command was asked to display names (or it wasn't asked not to display them with "-n") so for every hop, before sending the probe it tries to resolve the name.

If you call it with a "-n" option it wont.
If you try it twice in fast sequence (without "-n") you'll notice that the second time it won't do these requests (they were cached).

L

On 6/3/07, Tim Milgram <timmilgram@xxxxxxxxxxx> wrote:

Can anybody explain why there is a DNS request after every hop in a captured
traceroute?  I would really appreciate it.

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