how many bytes can a single outgoing DNS request - Techist - Tech Forum

Go Back   Techist - Tech Forum > Techist Forum Information > New Member Introductions
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 05-20-2013, 09:55 AM   #1 (permalink)
Virgin Techie
 
Join Date: May 2013
Location: gilson
Posts: 0
Default how many bytes can a single outgoing DNS request

how many bytes can a single outgoing DNS request carry as part of the hostname component of the FQDN?

what would happen if identical FQDN requests were made to the remote DNS server?

how would you prevent this from occurring?

As I know that DNS dictates that a FQDN must not exceed 255 octets and a machine name must not exceed 63 octets.

Kindly any help would be much appreciated. As I am new member and trying to learn.
__________________

beginnergirl is offline   Reply With Quote
Old 05-20-2013, 11:50 AM   #2 (permalink)
Super Techie
 
xerolen's Avatar
 
Join Date: Jan 2012
Posts: 278
Send a message via AIM to xerolen Send a message via MSN to xerolen Send a message via Yahoo to xerolen
Default Re: how many bytes can a single outgoing DNS request

It's a UDP request so you might lose some of your packets and multiple servers may respond to the request. A DNS Request at least for the host portion cannot exceed 256 bytes at least from my research.
__________________

xerolen is offline   Reply With Quote
Old 05-20-2013, 01:45 PM   #3 (permalink)
Virgin Techie
 
Join Date: May 2013
Location: gilson
Posts: 0
Default Re: how many bytes can a single outgoing DNS request

Thanks for your time.

Ok so how would you prevent this from occurring?
beginnergirl is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:03 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.