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From: TOMITA Yoshinori <yoshint@flab.fujitsu.co.jp>
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$BIYED$G$9!#(B

$B%N!<%H%Q%=%3%s(B($B@h7nKv$3$m$N(BFreeBSD 5.0-CURRENT,fxp,CardBus)$B$r;}$C$F!"(B
$B$"$A$3$A$K:9$7$F!"(Bscp$B$GBg$-$$%U%!%$%k$rAw$C$F$_$^$7$?!#(B

 (X)
  |
10Base-T dumb Hub---($B%$%(%m!<%1!<%V%k(B)---(AUI$B%1!<%V%k(B)--- $B!A(B

  $B!A(B ----cisco$B$N%9%$%C%A%s%0%O%V(B---(100BaseTX)---10/100SW HUB--- $B!A(B

  $B!A(B ----10/100SW HUB --- ($B8w%U%!%$%P(B) ---10/100SW HUB--- 10/100SW HUB
          |                                                   |
         (P)                                                 (Q)



$B!&(B(X)$B$H$9$06aNY$N(Bdumb Hub$B$K$D$J$$$@%N!<%H(BPC$B$+$i!"(B(X)$B$X(B
$B"*(B $BB.$$(B(10Base-T$B$J$j$NB.EY$G(B)

$B!&(B(P)(Q)$B$+$i!"(B(X)$B$H$9$06aNY$N(Bdumb Hub$B$K$D$J$$$@%N!<%H(BPC$B$X(B
$B"*(B $B6KC<$KCY$$(B(X$B$HF1$88=>]$+(B)



$B!&(Bcisco$B$N(Bsw hub(Catalyst2100)$B$N(B10M$B%]!<%H$+$i!"(B(X)$B$X(B
$B"*6KC<$KCY$/$J$k(B($B$7$+$b!"%N!<%H(BPC$B$G(Bnetstat$B$r$_$k$H(Bcollision$B$,$G$F$?(B)

$B!&(Bcisco$B$N(Bsw hub(Catalyst2100)$B$N(B10M$B%]!<%H$+$i!"(B(P)$B$b$7$/$O(B(Q)$B$X(B
$B"*(B10Base-T$BJB$NB.EY(B($B$7$+$7F1MM$K(Bnetstat$B$G(Bcollision$B$,!D$s!)(B)



$B$^$?!"%N!<%H(BPC$B$G$O(B100$B$N(Bfull-duplex$B$KL@<(E*$KJQ99$7(B

$B!&(Bcisco$B$N(Bsw hub$B$N(B100M$B%]!<%H$+$i!"(B(X)$B$X(B
$B"*6KC<$KCY$/$J$k(B

$B!&(Bcisco$B$N(Bsw hub$B$N(B100M$B%]!<%H$+$i!"(B(P)$B$b$7$/$O(B(Q)$B$X(B
$B"*B.$$(B



$B$H$$$&$o$1$G!"(Bcatalyst2100$B!A(Bdumb hub$B4V$,2x$7$$!)(B

# catalyst$B$G%H%i%U%#%C%/$N>pJs$r8+$k$H$$$$$+$b!)!)(B


$B$U$H;W$$=P$;$P!"0JA0!":#2s$HF1$8$h$&$J>u67$G!"$I$&$bI,MW0J>e$KDL?.B.EY(B
$B$,Mn$A$k$H$-$,$"$j$^$7$?(B($B:#2s$[$I6KC<$G$O$J$$$,(B)$B!#$=$N$H$-$O(B
catalyst1900$B$@$C$?$+$H;W$$$^$9$,!"(Blate collision$B$H$$$&%-!<%o!<%I$rL\$K(B
$B$7$?$h$&$J5$$,$7$F$-$^$7$?!#(B

$B7k6I!"8e$KJL$N(Bsw hub$B$KCV$-49$o$j!"$9$Y$F(B100 full-duplex$B$GE}0l$5$l$?$i!"(B
$B$^$C$?$/LdBj$J$/$J$C$?$H$$$&!D(B
# (P)$B!A(B(Q)$B$NItJ,$,!"$4$C$=$jCV$-49$o$C$?(B


-- 
---
TOMITA Yoshinori  $B"O"]!*'j'`"]!?'d!;'.&)&S'Q(B $B'5&O"f'_&)'*"~'A(-(B
(Fujitsu Laboratories Ltd., Kawasaki, Japan)
