bind 9.2.1 and dns packet

[Mark_Andrews at isc.org]

> 
> Hi,
> 
> I am using bind 9.2.1 and captured a query packet using tcpdump. In 
> addition to QDCOUNT=1, it contains ARCOUNT=1. Two questions 1) is it 
> legal? 2)why should a query packet contain AR records?
> 
> here is the packet in hex
> 
>      5313 0110 0001 0000 0000 0001 <- ARCOUNT
>      0377 7777 0475 636c 6103 6564
>      7500 000f 0001 0000 2908 0000
>      0080 0000 00
> 
> Thanks,
> 
> rajeev

	See RFC 2671, Extension Mechanisms for DNS (EDNS0).

--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org