| 1 |
<?xml version="1.0" encoding="iso-2022-jp"?> |
| 2 |
<!DOCTYPE rfc SYSTEM "rfc2629.dtd" [ |
| 3 |
<!ENTITY rfc.number "2606"> |
| 4 |
<!ENTITY ja.access "$B@\B3(B"> |
| 5 |
<!ENTITY ja.global "$B9-0h(B"> |
| 6 |
<!ENTITY ja.local "$B6ICOE*(B"> |
| 7 |
<!ENTITY ja.online " online "> |
| 8 |
<!ENTITY ja.domain.domain-name-system "$B%I%a%$%sL>7OE}(B"> |
| 9 |
<!ENTITY ja.domain.localhost "$B6ICO%[%9%H(B"> |
| 10 |
<!ENTITY ja.domain.record " record "> |
| 11 |
<!ENTITY ja.domain.root "$B:,(B"> |
| 12 |
<!ENTITY ja.domain.zone "$BNN0h(B"> |
| 13 |
<!ENTITY ja.inet.iana " Internet $B3dEvHV9f;vL36I(B"> |
| 14 |
<!ENTITY ja.ip.loopback " loop back "> |
| 15 |
<!ENTITY ja.software.release "$BH/I[(B"> |
| 16 |
]> |
| 17 |
<?rfc symrefs="yes"?> |
| 18 |
<rfc number="&rfc.number;" category="bcp" seriesNo="32" |
| 19 |
xmlns:myns="mailto:julian.reschke@greenbytes.de?subject=rcf2629.xslt" |
| 20 |
xmlns:ja="http://suika.fam.cx/~wakaba/lang/rfc/translation/" |
| 21 |
xmlns:h="http://www.w3.org/1999/xhtml"> |
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<front> |
| 23 |
<title>Reserved Top Level DNS Names</title> |
| 24 |
<ja:title xml:lang="ja">$B:G>e0L(B DNS $BL>$NM=Ls(B</ja:title> |
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<author initials="D." surname="Eastlake" fullname="Donald E. Eastlake 3rd"> |
| 26 |
<organization>IBM</organization> |
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<address> |
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<postal> |
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<street>65 Shindegan Hill Road</street> |
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<street>RR #1</street> |
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<city>Carmel</city> <region>NY</region> |
| 32 |
<code>10512</code> |
| 33 |
<country ja:show="no">US</country> |
| 34 |
</postal> |
| 35 |
<phone ja:text="+1 914-276-1668(h)">+1 914 276 1668</phone> |
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<phone ja:text="+1 914-784-7913(w)">+1 914 784 7913</phone> |
| 37 |
<facsimile ja:text="+1 914-784-3833(3)">+1 914 784 3833</facsimile> |
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<email>dee3@us.ibm.com</email> |
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</address> |
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</author> |
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<author initials="A." surname="Panitz" fullname="Aliza R. Panitz"> |
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<address> |
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<postal> |
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<street>500 Stamford Dr. No. 310</street> |
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<city>Newark</city> <region>DE</region> <code>19711</code> |
| 46 |
<country ja:text="USA">US</country> |
| 47 |
</postal> |
| 48 |
<phone ja:text="+1 302-738-1554">+1 302 738 1554</phone> |
| 49 |
<email>buglady@fuschia.net</email> |
| 50 |
</address> |
| 51 |
</author> |
| 52 |
<date month="June" year="1999" /> |
| 53 |
<abstract> |
| 54 |
<t> |
| 55 |
<ja:pair> |
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<ja:l xml:lang="en"> |
| 57 |
To reduce the likelihood of conflict and confusion, a few top |
| 58 |
level domain names are reserved for use in private testing, as |
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examples in documentation, and the like. In addition, a few |
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second level domain names reserved for use as examples are |
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documented. |
| 62 |
</ja:l> |
| 63 |
<ja:l xml:lang="ja"> |
| 64 |
$B>WFM!&:.Mp$N2DG=@-$r8:$i$9$?$a!"4v$D$+$N:G>e0L%I%a%$%sL>$r;dE*3NG'(B, |
| 65 |
$BJ8=qCf$G$NNc<($J$I$G;H$&$?$a$KM=Ls$7$^$9!#2C$($F!"Nc<($K;H$&$?$a$KM=Ls$5$l$F$$$k4v$D$+$NBhFs0L%I%a%$%sL>$rJ8=q2=$7$^$9!#(B |
| 66 |
</ja:l> |
| 67 |
</ja:pair> |
| 68 |
</t> |
| 69 |
</abstract> |
| 70 |
</front> |
| 71 |
<ja:front> |
| 72 |
<author fullname="$B$o$+$P(B" ja:id="wakaba"> |
| 73 |
<address> |
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<email>w@suika.fam.cx</email> |
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<uri>http://suika.fam.cx/~wakaba/</uri> |
| 76 |
</address> |
| 77 |
</author> |
| 78 |
<ja:change> |
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<ja:item year="2002" month="05" day="11"><author ja:ref="wakaba" /> |
| 80 |
<t>$BF|K\8l$KK]Lu!#(B</t> |
| 81 |
</ja:item> |
| 82 |
<ja:item year="2002" month="05" day="12"><author ja:ref="wakaba" /> |
| 83 |
<t><ja:link type="rfc" number="2629" /> $B$G%^!<%/IU$1!#(B</t> |
| 84 |
</ja:item> |
| 85 |
</ja:change><!-- $Date: 2002/05/09 09:52:35 $ --> |
| 86 |
</ja:front> |
| 87 |
<middle> |
| 88 |
|
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<ja:insert section="toc" /> |
| 90 |
<section title="Introduction"> |
| 91 |
|
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<t> |
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<ja:pair> |
| 94 |
<ja:l xml:lang="en"> |
| 95 |
The global Internet Domain Name System is documented in |
| 96 |
<xref target="RFC1034" />, <xref target="RFC1035" />, |
| 97 |
<xref target="RFC1591" /> |
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and numerous additional Requests for Comment. It defines |
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a tree of names starting with root, ".", immediately below which are |
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top level domain names such as <h:samp>.com</h:samp> |
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and <h:samp>.us</h:samp>. Below top level |
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domain names there are normally additional levels of names. |
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</ja:l> |
| 104 |
<ja:l xml:lang="ja"> |
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&ja.global; Internet &ja.domain.domain-name-system;$B$O(B |
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<xref target="RFC1034" />, <xref target="RFC1035" />, |
| 107 |
<xref target="RFC1591" /> $B$H?t$"$kDI2C$N(B |
| 108 |
Requests for Comment $B$GJ8=q2=$5$l$F$$$^$9!#$3$l$O(B&ja.domain.root;, |
| 109 |
"." $B$G;O$^$j!"??2<$K(B <h:samp>.com</h:samp>, <h:samp>.us</h:samp> |
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$B$N$h$&$J:G>e0L%I%a%$%sL>$,Mh$kLZ$rDj5A$9$k$b$N$G$9!#:G>e0L%I%a%$%sL>$N2<$K$ODL>o!"DI2C$N3,0L$NL>A0$,Mh$^$9!#(B |
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</ja:l> |
| 112 |
</ja:pair> |
| 113 |
</t> |
| 114 |
</section> |
| 115 |
|
| 116 |
<section title="TLDs for Testing, & Documentation Examples" |
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ja:title-ja="$B<B83!&Nc<(MQ$N(B TLD"> |
| 118 |
|
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<t> |
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<ja:pair> |
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<ja:l xml:lang="en"> |
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There is a need for top level domain (TLD) names that can be used for |
| 123 |
creating names which, without fear of conflicts with current or |
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future actual TLD names in the global DNS, can be used for private |
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testing of existing DNS related code, examples in documentation, DNS |
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related experimentation, invalid DNS names, or other similar uses. |
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</ja:l> |
| 128 |
<ja:l xml:lang="ja"> |
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$B8=:_$d>-Mh$N(B&ja.global; DNS $B<B:]$N(B TLD $BL>$H$N>WFM$N6sL5$7$K!"4{B8$N(B |
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DNS $B4XO"%3!<%I$N;dE*$J<B83$dJ8=qFb$G$NNc<((B, DNS $B4XO"<B83(B, |
| 131 |
$BIT@5$J(B DNS $BL>(B, $B$=$NB>F1MM$J$3$H$K;H$&$3$H$,=PMh$k:G>e0L%I%a%$%s(B |
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(TLD) $BL>$,I,MW$G$9!#(B |
| 133 |
</ja:l> |
| 134 |
</ja:pair> |
| 135 |
</t> |
| 136 |
|
| 137 |
<t> |
| 138 |
<ja:pair> |
| 139 |
<ja:l xml:lang="en"> |
| 140 |
For example, without guidance, a site might set up some local |
| 141 |
additional unused top level domains for testing of its local DNS code |
| 142 |
and configuration. Later, these TLDs might come into actual use on |
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the global Internet. As a result, local attempts to reference the |
| 144 |
real data in these zones could be thwarted by the local test |
| 145 |
versions. Or test or example code might be written that accesses a |
| 146 |
TLD that is in use with the thought that the test code would only be |
| 147 |
run in a restricted testbed net or the example never actually run. |
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Later, the test code could escape from the testbed or the example be |
| 149 |
actually coded and run on the Internet. Depending on the nature of |
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the test or example, it might be best for it to be referencing a TLD |
| 151 |
permanently reserved for such purposes. |
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</ja:l> |
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<ja:l xml:lang="ja"> |
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$BNc$($P!"<j0z$-$,L5$$$H!"$I$3$+$N%5%$%H$,(B&ja.local;$B$GDI2C$NL$;HMQ$J:G>e0L%I%a%$%s$r(B&ja.local; |
| 155 |
DNS $B%3!<%I$d@_Dj$N3NG'$N$?$a$K@_Dj$9$k$+$b$7$l$^$;$s!#8e$G!"(B |
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$B$3$N(B TLD $B$,(B&ja.global; Internet |
| 157 |
$B$G<B:]$K;H$o$l$k$3$H$K$J$k$+$b$7$l$^$;$s!#7k2L$H$7$F!"(B&ja.local;$B$K$F$3$N(B&ja.domain.zone;$B$N<B:]$N%G!<%?$r;2>H$7$h$&$H$9$k$H!"(B&ja.local;$B$J3NG'HG$N$?$a$K>e<j$/$$$+$J$$$3$H$G$7$g$&!#$"$k$$$O!"@)8B$5$l$?<B83BfLV$G$N$_F0$+$5$l$k$+(B, |
| 158 |
$B<B:]$KF0$+$5$l$k$3$H$NL5$$Nc<($H9M$($F;H$C$F$$$k(B |
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TLD $B$K(B&ja.access;$B$9$k!"3NG'$dNc<($N%3!<%I$,=q$+$l$k$+$b$7$l$^$;$s!#8e$G!"3NG'%3!<%I$,<B83Bf$+$iO3$l$k$+$b$7$l$^$;$s$7!"Nc<($,<B:]$K%3!<%I2=$5$l$F(B |
| 160 |
Internet $B$GF0$+$5$l$k$+$b$7$l$^$;$s!#3NG'$dNc<($N@-<A$r4U$_$k$H!"$3$l$i$NL\E*$K1J5W$KM=Ls$7$?(B |
| 161 |
TLD $B$r;2>H$9$k$N$,:GA1$N:v$G$7$g$&!#(B |
| 162 |
</ja:l> |
| 163 |
</ja:pair> |
| 164 |
</t> |
| 165 |
|
| 166 |
<t> |
| 167 |
<ja:pair> |
| 168 |
<ja:l xml:lang="en"> |
| 169 |
To safely satisfy these needs, four domain names are reserved as |
| 170 |
listed and described below. |
| 171 |
</ja:l> |
| 172 |
<ja:l xml:lang="ja"> |
| 173 |
$B$3$N<{MW$r0BA4$KK~$?$9$?$a$K!"2<$K5s$2$F@bL@$9$k(B4$B$D$N%I%a%$%sL>$rM=Ls$7$^$9!#(B |
| 174 |
</ja:l> |
| 175 |
</ja:pair> |
| 176 |
|
| 177 |
<list style="empty"> |
| 178 |
<t><xref target="tld.test">.test</xref></t> |
| 179 |
<t><xref target="tld.example">.example</xref></t> |
| 180 |
<t><xref target="tld.invalid">.invalid</xref></t> |
| 181 |
<t><xref target="tld.localhost">.localhost</xref></t> |
| 182 |
</list> |
| 183 |
|
| 184 |
<list style="empty"> |
| 185 |
<t ja:anchor="tld.test"> |
| 186 |
<ja:pair> |
| 187 |
<ja:l xml:lang="en"> |
| 188 |
".test" is recommended for use in testing of current or new DNS |
| 189 |
related code. |
| 190 |
</ja:l> |
| 191 |
<ja:l xml:lang="ja"> |
| 192 |
$B!V(B.test$B!W(B($B3NG'(B) |
| 193 |
$B$O8=9T$^$?$O?75,$N(B DNS $B4XO"%3!<%I$N3NG'$K;H$&$3$H$r?d>)$7$^$9!#(B |
| 194 |
</ja:l> |
| 195 |
</ja:pair> |
| 196 |
</t> |
| 197 |
|
| 198 |
<t ja:anchor="tld.example"> |
| 199 |
<ja:pair> |
| 200 |
<ja:l xml:lang="en"> |
| 201 |
".example" is recommended for use in documentation or |
| 202 |
as examples. |
| 203 |
</ja:l> |
| 204 |
<ja:l xml:lang="ja"> |
| 205 |
$B!V(B.example$B!W(B ($BNc(B) $B$OJ8=q$dNc$NCf$G;H$&$3$H$r?d>)$7$^$9!#(B |
| 206 |
</ja:l> |
| 207 |
</ja:pair> |
| 208 |
</t> |
| 209 |
|
| 210 |
<t ja:anchor="tld.invalid"> |
| 211 |
<ja:pair> |
| 212 |
<ja:l xml:lang="en"> |
| 213 |
".invalid" is intended for use in online construction of |
| 214 |
domain names that are sure to be invalid and which it is |
| 215 |
obvious at a glance are invalid. |
| 216 |
</ja:l> |
| 217 |
<ja:l xml:lang="ja"> |
| 218 |
$B!V(B.invalid$B!W(B ($BIT@5(B) |
| 219 |
$B$OIT@5$G$"$k$N$,3N<B$G!"0lL\$GIT@5$G$"$k$H3NG'=PMh$k%I%a%$%sL>$N(B&ja.online;$B9=B$$K;H$&$3$H$r0U?^$7$F$$$^$9!#(B |
| 220 |
</ja:l> |
| 221 |
</ja:pair> |
| 222 |
</t> |
| 223 |
|
| 224 |
<t ja:anchor="tld.localhost"> |
| 225 |
<ja:pair> |
| 226 |
<ja:l xml:lang="en"> |
| 227 |
The ".localhost" TLD has traditionally been statically |
| 228 |
defined in host DNS implementations as having an A record |
| 229 |
pointing to the loop back IP address and is reserved for |
| 230 |
such use. Any other use would conflict with widely |
| 231 |
deployed code which assumes this use. |
| 232 |
</ja:l> |
| 233 |
<ja:l xml:lang="ja"> |
| 234 |
$B!V(B.localhost$B!W(B (&ja.domain.localhost;) TLD $B$OEAE}E*$K%[%9%H(B |
| 235 |
DNS $B<BAu$G(B&ja.ip.loopback; IP address $B$r;X$9(B A |
| 236 |
&ja.domain.record;$B$r;}$D$H8GDjE*$KDj5A$5$l$F$$$k$N$G!"$3$NMQES$KM=Ls$7$^$9!#B>$NL\E*$K;H$&$H!"$3$l$r2>Dj$7$F$$$k!"9-$/;H$o$l$F$$$k%3!<%I$H>WFM$9$k$G$7$g$&!#(B |
| 237 |
</ja:l> |
| 238 |
</ja:pair> |
| 239 |
</t> |
| 240 |
</list> |
| 241 |
</t> |
| 242 |
</section> |
| 243 |
|
| 244 |
<section title="Reserved Example Second Level Domain Names" |
| 245 |
ja:title-ja="$BM=LsNc<(BhFs0L%I%a%$%sL>(B"> |
| 246 |
|
| 247 |
<t> |
| 248 |
<ja:pair> |
| 249 |
<ja:l xml:lang="en"> |
| 250 |
The Internet Assigned Numbers Authority (IANA) also currently has the |
| 251 |
following second level domain names reserved which can be used as |
| 252 |
examples. |
| 253 |
</ja:l> |
| 254 |
<ja:l xml:lang="ja"> |
| 255 |
<eref target="http://www.iana.org/">&ja.inet.iana; (IANA)</eref> |
| 256 |
$B$O8=:_<!$NBhFs0L%I%a%$%sL>$bNc<($K;H$($k$h$&$KM=Ls$7$F$$$^$9!#(B |
| 257 |
</ja:l> |
| 258 |
</ja:pair> |
| 259 |
|
| 260 |
<list style="empty"> |
| 261 |
<t>example.com</t> |
| 262 |
<t>example.net</t> |
| 263 |
<t>example.org</t> |
| 264 |
</list> |
| 265 |
</t> |
| 266 |
<ja:note>example.edu $B$b(B IANA $B$,M=Ls$7$F$$$k$h$&$G$9!#(B</ja:note> |
| 267 |
</section> |
| 268 |
|
| 269 |
<section title="IANA Considerations"> |
| 270 |
<t> |
| 271 |
<ja:pair> |
| 272 |
<ja:l xml:lang="en"> |
| 273 |
IANA has agreed to the four top level domain name reservations |
| 274 |
specified in this document and will reserve them for the uses |
| 275 |
indicated. |
| 276 |
</ja:l> |
| 277 |
<ja:l xml:lang="ja"> |
| 278 |
IANA $B$O$3$NJ8=q$G@bL@$7$F$$$k(B4$B$D$N:G>e0L%I%a%$%sL>$rM=Ls$9$k$N$KF10U$7!"$3$l$r;XDj$5$l$?MQES$KM=Ls$7$^$9!#(B |
| 279 |
</ja:l> |
| 280 |
</ja:pair> |
| 281 |
</t> |
| 282 |
</section> |
| 283 |
|
| 284 |
<section title="Security Considerations"> |
| 285 |
|
| 286 |
<t> |
| 287 |
<ja:pair> |
| 288 |
<ja:l xml:lang="en"> |
| 289 |
Confusion and conflict can be caused by the use of a current or |
| 290 |
future top level domain name in experimentation or testing, as an |
| 291 |
example in documentation, to indicate invalid names, or as a synonym |
| 292 |
for the loop back address. Test and experimental software can escape |
| 293 |
and end up being run against the global operational DNS. Even |
| 294 |
examples used $B!H(Bonly$B!I(B in documentation can end up being coded and |
| 295 |
released or cause conflicts due to later real use and the possible |
| 296 |
acquisition of intellectual property rights in such $B!H(Bexample$B!I(B names. |
| 297 |
</ja:l> |
| 298 |
<ja:l xml:lang="ja"> |
| 299 |
$B8=:_$^$?$O>-Mh$N:G>e0L%I%a%$%sL>$r<B83$d3NG'(B, |
| 300 |
$BJ8=qCf$G$NNc<($dIT@5L>$r<($9$N$d(B&ja.ip.loopback; |
| 301 |
address $B$NN`5A8l$K;H$&$3$H$G:.Mp$H>WFM$,5/$3$jF@$^$9!#3NG'!&<B83E*%=%U%H%&%'%"$O(B&ja.global; |
| 302 |
DNS $B$rHr$1$FF0$+$9$3$H$,=PMh$^$9!#J8=qFb!V$N$_!W$K;H$o$l$kNc<($G$b!"%3!<%I2=$5$l$F(B&ja.software.release;$B$5$l$?$j!"8e$N<B:]$N;HMQ$d!VNc<(!WL>$NCNE*=jM-8"$N<hF@$K$h$k>WFM$,5/$3$jF@$^$9!#(B |
| 303 |
</ja:l> |
| 304 |
</ja:pair> |
| 305 |
</t> |
| 306 |
|
| 307 |
<t> |
| 308 |
<ja:pair> |
| 309 |
<ja:l xml:lang="en"> |
| 310 |
The reservation of several top level domain names for these purposes |
| 311 |
will minimize such confusion and conflict. |
| 312 |
</ja:l> |
| 313 |
<ja:l xml:lang="ja"> |
| 314 |
$B?t8D$N:G>e%I%a%$%sL>$r$3$l$i$NL\E*$KM=Ls$9$k$3$H$G!":.Mp$H>WFM$r:G>.8B$KM^$($k$3$H$,$G$-$k$G$7$g$&!#(B |
| 315 |
</ja:l> |
| 316 |
</ja:pair> |
| 317 |
</t> |
| 318 |
</section> |
| 319 |
|
| 320 |
</middle> |
| 321 |
|
| 322 |
<back> |
| 323 |
<references> |
| 324 |
<reference anchor="RFC1034" ja:text="RFC 1034" |
| 325 |
ja:target-ja="http://selene.ok.mei.titech.ac.jp/docs/studies/rfc1034jp.txt"> |
| 326 |
<front> |
| 327 |
<title abbrev="Domain Concepts and Facilities">Domain Names $B!=(B Concepts and Facilities</title> |
| 328 |
<ja:title xml:lang="ja">$B%I%a%$%sL>!=35G0$H5!G=(B</ja:title> |
| 329 |
<author initials="P." surname="Mockapetris" fullname="P. Mockapetris"> |
| 330 |
<organization abbrev="ISI">Information Sciences Institute (ISI)</organization> |
| 331 |
</author> |
| 332 |
<date month="November" year="1987" /> |
| 333 |
</front> |
| 334 |
<seriesInfo name="STD" value="13" /> |
| 335 |
<seriesInfo name="RFC" value="1034" /> |
| 336 |
</reference> |
| 337 |
<reference anchor="RFC1035" ja:text="RFC 1035"> |
| 338 |
<front> |
| 339 |
<title abbrev="Domain Implementation and Specification">Domain Names $B!=(B Implementation and Specification</title> |
| 340 |
<ja:title xml:lang="ja">$B%I%a%$%sL>!=<BAu$H;EMM(B</ja:title> |
| 341 |
<author initials="P." surname="Mockapetris" fullname="P. Mockapetris"> |
| 342 |
<organization abbrev="ISI">USC/ISI</organization> |
| 343 |
</author> |
| 344 |
<date month="November" year="1987" /> |
| 345 |
</front> |
| 346 |
<seriesInfo name="STD" value="13" /> |
| 347 |
<seriesInfo name="RFC" value="1035" /> |
| 348 |
</reference> |
| 349 |
<reference anchor="RFC1591" ja:text="RFC 1591"> |
| 350 |
<front> |
| 351 |
<title>Domain Name System Structure and Delegation</title> |
| 352 |
<ja:title xml:lang="ja">$B%I%a%$%sL>(B&ja.domain.domain-name-system;$B9=B$$H0QG$(B</ja:title> |
| 353 |
<author initials="J." surname="Postel" fullname="Jon Postel" /> |
| 354 |
<date month="March" year="1994" /> |
| 355 |
</front> |
| 356 |
<seriesInfo name="RFC" value="1591" /> |
| 357 |
</reference> |
| 358 |
</references> |
| 359 |
</back> |
| 360 |
<ja:back> |
| 361 |
<section title="$B;29M(B"> |
| 362 |
<section title="$BEPO?Jm(B"> |
| 363 |
<list style="symbols"> |
| 364 |
<t>IANA |
| 365 |
<eref target="http://www.iana.org/domain-names.htm" xml:lang="en">Domain Name Services</eref> |
| 366 |
$B$N:G>e0L%I%a%$%sL>$N9`$K$O!"(B2002$BG/(B5$B7n8=:_$3$l$i$N:G>e0L%I%a%$%sL>$K$D$$$F$N>pJs$O$"$j$^$;$s!&!&!&!#(B</t> |
| 367 |
<t>IANA $B$,M=Ls$7$F$$$k$3$H$r<($9EPO?Jm$N$h$&$J$b$N$O8+Ev$j$^$;$s!#(B |
| 368 |
(whois $B$G$b=P$F$-$^$;$s$7(B...)</t> |
| 369 |
<t>TLD $B!V(B.localdomain$B!W$b(B .localhost |
| 370 |
$B$H;w$?$h$&$JL\E*$G;H$o$l$F$$$^$9!#(B</t> |
| 371 |
</list> |
| 372 |
</section> |
| 373 |
<section title="$BB>$NK]Lu(B"> |
| 374 |
<t><eref target="http://www.goto.info.kanagawa-u.ac.jp/~horiyuki/rfc/rfc2606j.txt" /> ($B2,660l51$5$sLu(B)</t> |
| 375 |
</section> |
| 376 |
</section> |
| 377 |
</ja:back> |
| 378 |
</rfc> |