🚀 go-pugleaf

In article <MARUYAMA.92Oct27143106@sunnm.ism.ac.jp>
	maruyama@sunnm.ism.ac.jp (MARUYAMA Naomasa) writes:
 > 
 > $@E}?t8&$N4];3$G$9!#$b$N$9$4!<$/=iJbE*$J<ALd$G62=L$G$9$,!"(J$@!"!"(J

$@$8$c$"(J RFC950 $@$G$bFI$s$G$+$i=PD>$9$s$G$9$M!#(J:-)
$@$3$N%5%V%M%C%H$rDj5A$7$?(J RFC $@$K$O!"0J2<$N5-=R$,(J$@$"$j$^$9(J:

      For example, on a Class B network with a 6-bit wide subnet field,
      an address would be broken down like this:

                           1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |1 0|        NETWORK            |  SUBNET   |    Host Number    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
$@!JCfN,!K(J
            In the example above, the 6-bit wide subnet field may have
            any value except 0 and 63.
                      ^^^^^^^^^^^^^^^$@!J2<@~!"J?86IU2C!K(J
Mogul & Postel                                                  [Page 6]
RFC 950                                                      August 1985
$@!J0zMQ=*$j!K(J

 > B class $@$N%M%C%H%o!<%/$G(J subnet mask 255.255.255.0 $@$N;~!"%5%V%M%C%H%"(J
 > $@%I%l%9$H$7(J$@$F(J 0 $@$O;H$($k$N$G$7$g$&$+!)(J
 > 
 > $@$D$^$j!"$&$A$N>l9g$G$9$H(J 133.58 $@$,M?$($i$l$?(J B class $@$G$9$,!"(J
 > 133.58.0.xxx $@$,;H$($k$+$H8@$&<ALd$G$9!#(J

$@$G!"L5M}LpM};H$&$H!"(JUNIX $@$N<BAu$NB?$/$O7PO)@)8f%F!<%V%kFb$K$3(J$@$NFC<l$J(J
$@%5%V%M%C%H%k!<%H$,$"$C$F$b4|BTDL$jF0$-$^$9$,!"%k!<%F%#%s%0@)8f%W%m%0%i(J
$@%`$,%5%V%M%C%H$H$7$F07(J$@$($J$$>l9g$,$"$j$^$9!#$D$^$j(J 133.58.0.0 $@$O!"%5%V(J
$@%M%C%H$N%k!<%H$+$=$N%M%C%H%o!<%/A4BN$rBeI=$9$k%k!<%H(J$@$+H=JL$G$-$J$$$+$i(J
$@$G$9!#>/$/$H$b(J gated $@$O!"$3$N(J 133.58.0.0 $@$r%5%V%M%C%H%k!<%H$H$7$F07$((J
$@$^$;$s!#$D$^(J$@$j7PO)>pJs$,AH?%Fb$KN.$l$J$$!#(J

$@%k!<%?$K$O!"A4A307$($J$$$N$b$"$k!J(J133.58.0.0 $@$O%5%V%M%C%H%G%U%)%k%H%k(J$@!<(J
$@%H(J--$@%G%U%)%k%H%k!<%H(J 0.0.0.0 $@$N%5%V%M%C%HHG$G$9$M!"(JUNIX $@$K$O$J$$(J--$@$H$7(J
$@$F07$o$l$k!K$h$&$G$9$7!"@_Dj(J$@$K$h$j07$($k$h$&$K$J$k$N$b$"$k$=$&$G$9!#(J

$@;~!9(J CLASS B $@$N%"%I%l%9$G!"(J133.XX.0.xxx $@$H$+$$$&%"%I%l%9$rIU(J$@$1$F$$$k%[(J
$@%9%H$r8+$+$1$^$9$,!":#!"%5%V%M%C%H$7$F$$$J$$$H$7$F$b!J$7$F$$$?$i$J$*$5(J
$@$i!KHr$1$?J}$,L5Fq$@(J$@$H;W$$$^$9!#FC$K#0HV$H$+?t$N>/$$J}$r!"FCJL$J$H$3$m(J
$@$K3d$jEv$F$k?.6D$r$*;}$A$NJ}$b$$$i$C$7$c$k$h$&$G!"(J$@1F6A$bBg$-$$!)!*(J

 > $@$D$$$G$K;G$$$^$9$,!"(J 255 $@$NJ}$O$I$&$G$7$g$&$+!#(J
 > 
 > $@!t;H$($J$$!"$J$s$F$3$H$J$$(J$@$@$m$&$H;W$$$^$9$,!"$D$$?4G[$K$J$C$F$7$^$C$F!"!"(J

$@$3$C$A$O!"$I$&$b8=<B$K$O;H$($k$h$&$G$9$,!"(JRFC $@$K=>$&(J$@$N$,@5$7$$N)>l$G$7$g(J
$@$&!#!J$@$+$i!"(JCLASS C $@$r#8$D$KJ,$1$F(J... $@$H;W$C$F$b!"<B:]$K;H$($k$N$O#6$D(J
$@$J$N$@!*(J$@!K(J

--
$@J?86@5<y(J

$@E}?t8&$N4];3$G$9!#(J

$@J?86$5$s!'(J
In article <HI.92Oct31092600@yumiko.nc.u-tokyo.ac.jp>
hi@nc.u-tokyo.ac.jp (Masaki Hirabaru) writes:

>$@$8(J$@$c$"(J RFC950 $@$G$bFI$s$G$+$i=PD>$9$s$G$9$M!#(J:-)

$@8@$o$l$F$7$^$C$?!*%a!<%k$GB>$NJ}$+$i(J RFC 1122 $@$r$*4+$a(J$@D:$-$^$7$?!#(J
$@!J(Jgated $@$N%^%K%e%"%k$r8+$l$P(J RFC 904, RFC 1105 $@$r0zMQ$7$F$"$k$7!";d(J
$@$N$h$&$J!V7s6H%7%9%F(J$@%`4IM}<T!W$O$$$C$?$$$I$l$@$1$N(J RFC $@$rFI$^$J$-$c(J
$@$$$+$s$N$@$m$&!)!K(J

>$@$D$^$j(J 133.58.0.0 $@$O!"%5%V(J
>$@%M%C(J$@%H$N%k!<%H$+$=$N%M%C%H%o!<%/A4BN$rBeI=$9$k%k!<%H$+H=JL$G$-$J$$$+$i(J
>$@$G$9!#>/$/$H$b(J gated $@$O!"$3$N(J 133.58.0.0 $@$r%5%V%M%C%H%k!<%H$H$7$F07$((J
>$@$^$;$s!#$D$^$j7PO)>pJs$,AH?%Fb$KN.$l$J$$!#(J

$@$J$k$[$I!#$3$N@bL@$O(J$@$H$C$F$bNI$/$o$+$j$^$9!#(J

$@;d$,:#$^$G;}$C$F$$$?463P$H$7$F$O!"(J B-class $@$G(J netmask 255.255.255.0$@$H(J
$@$7$?;~(J$@$N(J subnet $@0l8D$O!"(J C-class $@0l8D$KEy2A$G$"$C$FM_$7$$$H;W$C$F$*$j(J
$@$^$7$?!#$=$l$G!"(J 192.xx.0.0 $@$H8@$&(J C-class $@$O$"$k$h$&$J$N$G!"(J 
133.58.0.xx $@$b$$$$$N$+$J!"$H8@$&!"$J$+$P4|BT8r$8$j$N8m2r$r;}$C$F$7$^$C(J
$@$?$o(J$@$1$G$9!#$G$b8=<B$N(J TCP/IP $@$O$=$&$G$OL5$$!"$H8@$&$3$H$G$9$M!#(J

$@M-Fq$&$4$6$$$^$7$?!#(J

--
1992$@G/(J11$@7n(J02$@F|(J($@7n(J)
--------
$@4];3D>>;!wE}7W?tM}8&5f=j(J
maruyama@ism.ac.jp