[Jack-Devel] Noisy Signal - Fragmented Data

Jonathan Aquilina jaquilina at eagleeyet.net
Wed Apr 13 14:35:25 CEST 2016


Also another difference between TCP VS UDP 

If there is a packet which is not recieved it will request a resend of
that missing packet.  UDP on the other hand will not request a packet
resent if they are dropped or not received.

On 2016-04-11 04:50, Chris Caudle wrote:

> On Thu, April 7, 2016 6:57 am, Kenneth Fields wrote: 
> 
>> I find that with larger data chunks (over about 1500k), the packets can be
>> fragmented 2 or 3 times or more.
> 
> Do you mean 1500k or 1500 bytes?  1500 bytes is the standard maximum
> transmission unit (MTU) for Ethernet.  Anything over 1500 bytes is
> considered jumbo frames.  Most switches can be configured to accept jumbo
> frames but would drop them by default.
> 
>> Where does the fragmenting happen, on sender side? In transit?
> 
> Your network stack should determine the MTU and only send packets that
> size or below.
> 
>> Would the machine ever have any problem "reassembling" the chunks?
> 
> That is the job of the TCP part of the network stack, so it depends on
> whether the protocol you are using uses TCP, UDP, or some other
> application level protocol.
 
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