UDP vs TCP

[Kevin Darcy]

Brad Knowles wrote:

> At 5:47 PM +0100 3/13/01, Victor wrote:
>
> >       dns_tcp  53 : zone transfers.
> >       dns_udp  53 name resolution.
>
>         Not entirely true.  It is perfectly valid to have DNS queries
> (other than zone transfers) occur on TCP port 53, and as the DNS
> continues to mature, and DNS queries get larger and responses to DNS
> queries get larger (what with TSIG and IPv6), you'll see more and
> more queries using TCP.

Hopefully not. See
http://www.ietf.org/internet-drafts/draft-ietf-dnsext-message-size-04.txt


- Kevin

>
>
> --
> Brad Knowles, <brad.knowles at skynet.be>
>
> #!/usr/bin/perl -w
> # 531-byte qrpff-fast, Keith Winstein and Marc Horowitz <sipb-iap-dvd at mit.edu>
> # MPEG 2 PS VOB file on stdin -> descrambled output on stdout
> # arguments: title key bytes in least to most-significant order
> # Usage:
> # qrpff 153 2 8 105 225 /mnt/dvd/VOB_FILE_NAME | extract_mpeg2 | mpeg2_dec -
> $_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map{$_%16or$t^=$c^=(
> $m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;$t^=(72, at z=(64,72,$a^=12*($_%16
> -2?0:$m&17)),$b^=$_%64?12:0, at z)[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h
> =5;$_=unxb24,join"", at b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$
> d=unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d>>12^$d>>4^
> $d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*8^$q<<6))<<9,$_=$t[$_]^
> (($h>>=8)+=$f+(~$g&$t))for at a[128..$#a]}print+x"C*", at a}';s/x/pack+/g;eval