From owner-FreeBSD-net-jp@jp.freebsd.org  Sun Feb 28 02:11:16 1999
Received: by jaz.jp.freebsd.org (8.9.2+3.1W/8.7.3) id CAA09145;
	Sun, 28 Feb 1999 02:11:16 +0900 (JST)
	(envelope-from owner-FreeBSD-net-jp@jp.FreeBSD.org)
Received: from uni.neko.IRI.co.jp (uni.neko.IRI.co.jp [202.238.108.188])
	by jaz.jp.freebsd.org (8.9.2+3.1W/8.7.3) with ESMTP id CAA09138
	for <FreeBSD-net-jp@jp.freebsd.org>; Sun, 28 Feb 1999 02:11:13 +0900 (JST)
	(envelope-from dai@IRI.co.jp)
Received: from localhost (localhost [127.0.0.1])
	by uni.neko.IRI.co.jp (3.7W-neko-19990119) with ESMTP id BAA21379;
	Sun, 28 Feb 1999 01:48:55 +0900 (JST)
To: FreeBSD-net-jp@jp.freebsd.org, s96355kk@sfc.keio.ac.jp
In-Reply-To: Your message of "Sat, 27 Feb 1999 23:47:23 +0900"
	<36D8057B3AC.5174S96355KK@ma4.justnet.ne.jp>
References: <36D8057B3AC.5174S96355KK@ma4.justnet.ne.jp>
X-Mailer: Mew version 1.93 on Emacs 19.28 / Mule 2.3 (SUETSUMUHANA)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit
Message-Id: <19990228014854T.dai@IRI.co.jp>
Date: Sun, 28 Feb 1999 01:48:54 +0900
From: Dai Nishino <dai@IRI.co.jp>
X-Dispatcher: imput version 980905(IM100)
Lines: 53
Reply-To: FreeBSD-net-jp@jp.freebsd.org
Precedence: list
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+981115
X-Sequence: FreeBSD-net-jp 1396
Subject: [FreeBSD-net-jp 1396] Re: subnetmask
Errors-To: owner-FreeBSD-net-jp@jp.freebsd.org
Sender: owner-FreeBSD-net-jp@jp.freebsd.org
X-Originator: dai@IRI.co.jp

From: "Kono Ken'ichi" <s96355kk@sfc.keio.ac.jp>
Subject: [FreeBSD-net-jp 1393] subnetmask
Date: Sat, 27 Feb 1999 23:47:23 +0900

s96355kk> $B!!$J$s$F<+J,$G0N$=$&$J$3$H=q$$$H$$$F!"$J$s$J$s$G$9$,!"!"!"(B
s96355kk> $B%5%V%M%C%H%^%9%/$K$D$$$F<ALd$,$"$j$^$9!#(B

s96355kk> $B<ALd#2(B
s96355kk> 
s96355kk>  $B$b$&0l$D$N<ALd$O!"$I$s$J>u67$G$O!"%5%V%M%C%H(B 0.0.0.0$B!!$H$+!"!!(B255.255.255.255
s96355kk> $B$r@_Dj$G$-$k$N$G$9$+!)$H$$$&$b$N$G$9!#(B

netmask$B$r(B0.0.0.0$B$H@_Dj$9$k0UL#$OA[A|$G$-$^$;$s$,!D!#(B
0.0.0.0/0.0.0.0$B!J(Baddress/mask$B!K$O!"(Bdefault$B$r0UL#$9$k$N$G!"7PO)@)8f$J$I(B
$B$G;HMQ$5$l$^$9!#(B


255.255.255.255$B$N(Bnetmask$B$O!"(Bloopback address$B$J$I$K;HMQ$7$^$9!#(BOSPF$B$d(B
BGP4$B$J$I$G$O!"$3$N(BIF$B$r%k!<%?<+?.$rI=8=$9$k%"%I%l%9$H$7$F;HMQ$7$^$9!#(B
$B!t(BIS-IS$B$G$O!)(B :-)
$B%k!<%?$N$h$&$K(BIF$B$,$?$/$5$s$"$k$H!"$=$l$>$l$N(Bup/down$B$N1F6A$r$&$1$J$$$h(B
$B$&$J(BIF$B$,I,MW$K$J$k$s$G$9$h$M!#(B

$B$[$+$K$O!"%5!<%S%9%l%Y%k$N(Bsoftware interface$B$H$$$&$3$H$G!";HMQ$9$k(B
$B>l9g$,$"$j$^$9!#(B

$B$?$H$($P!"!J(Broot DNS servers$B$N$&$A$N0l$D$G$"$k!K(Bm.root-servers.net$B$N(B
202.12.27.33$B$J$I$O!"(Bloopback address$B$G$"$j!"(Bnetmask$B$K(B255.255.255.255$B$r(B
$B;HMQ$5$l$F$$$^$9!#(B
$B$G!#$8$D$O!"$3$N%"%I%l%9(B202.12.27.33/255.255.255.255$B$O!"FsBf$N%^%7%s$K(B
$B@_Dj$5$l$F$$$F!"JRJ}$,Mn$A$k$H$b$&JRJ}$,;H$o$l$k$h$&$K@_Dj$5$l$F$$$^$9!#(B
$B!t>\$7$$%a%+%K%:%`$N@bL@$O<jH4$-$7$F$^$9!#(B


s96355kk> $B!!$3$s$J%5%V%M%C%H%^%9%/$G$O!"%[%9%H$,(B1$BBf$b@_CV$G$-$J$$$H;W$&$N$G$9$,!#(B
s96355kk> $B!tFC$K:,5r$O2?$K$b$"$j$^$;$s$,!"%k!<%?!<$G$O$3$&$$$C$?@_Dj$,(B
s96355kk> $B!t$"$j$($=$&$J5$$,$7$^$9!#$G$b!"2?$G$J$N$+J,$+$j$^$;$s!#(B
s96355kk> 
s96355kk> $B!!$^$?!"$I$s$J>u67$G$O!"(B255.254.255.0$B!!!JE,@Z$JNc$G$O$J$$$+$b$7$l$^$;$s!K(B
s96355kk> $B$N$h$&$J!"%S%C%H$N(B 0$B$H(B 1$B$,O"B3$7$J$$%5%V%M%C%H%^%9%/$,5v$5$l$k$N$G$9$+!)(B

$B$b$H$b$H$N(BIP$B$N@$3&$G$O$f$k$5$l$F$$$^$7$?$,!"(BCIDR$B$,F3F~$5$l$F$+$i$O!"(B
$B5v$5$l$J$/$J$j$^$7$?!#(B
$B$b$A$m$s!"JD$8$?%M%C%H%o!<%/Fb$GL5M}$d$j;H$&$3$H$O$G$-$^$9$,!#(B


s96355kk> $B!tC/$+!"(BCISCO Router$B$$$8$i$;$F$/$l$J$$$+$J$!(B...

$B=)MU$GCf8E$r<j$K$$$l$k$H$+!)(B
$B:G6a$O!"(B1$B!A(B2$BK|1_$/$i$$$G<j$K$O$$$k$h$&$G$9$h!#(B
$B!t;d$N$*$&$A$N$d$D$O!"(B1$BK|(B8$B@i1_!#(B

-- $B$K$7$N$@$$!w#I#R#I(B
