Wireshark-users: Re: [Wireshark-users] MS FTP and NTP server
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From: Stephen Fisher <stephentfisher@xxxxxxxxx>
Date: Fri, 28 Nov 2008 11:00:36 -0700
On Fri, Nov 28, 2008 at 12:53:44AM -0800, Y Z wrote:

> I use MS FTP (the CLI one) to transfer file from my FTP server (IIS). 
> Does anyone know whether the file I download will be cached? I do 
> download the same file over and over again. I run Wireshark at both 
> server and client, it shows packets being transferred everytime I 
> download, so I assume the file is not cached and I get fresh file from 
> the server. Am I correct?

You are correct.

> My second concern is, is it necessary for me to sychronize my FTP 
> server and client via NTP server for example. My server is not for 
> commercial use but I do carry out packet data analysis. As far as I'm 
> concerned, as long as I can trace the packets through their sequence 
> numbers, the timing difference between server and client does not 
> bother me much. Is synchronization an issue that will affect say, RTT 
> or throughput?

Nope.


Steve