full-disclosure - Re: Exploring the UNKNOWN: Scanning the Internet via SNMP!

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Date: Thu, 06 Mar 2008 13:24:15 -0500
From: Valdis.Kletnieks@...edu
To: Static Rez <staticrez@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Exploring the UNKNOWN: Scanning the Internet
	via SNMP!

On Thu, 06 Mar 2008 09:13:05 EST, Static Rez said:

> Isn't it true that a TCP packet is typically 20 bytes, and a UDP packet
> about 8? This is minus any additional data that has been added to the
> packet. If this is true, then depending on the size of the pipe your sending
> the data through, and the amount of congestion there might be, a UDP packet
> would more easily and quickly hit its destination.

If your network is so congested that the difference between a min-sized TCP
packet and a min-sized UDP packet matters, you have *bigger* problems...

(In reality, most NICs will refuse to blat out a packet much smaller than
64 bytes or so - there was a number of info-disclosure issues with some
drivers that would try to send a 56 byte packet, and failed to zero out the
8 trailing bytes).

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