resolv.conf에 등록할 수 있는 DNS name 서버의 최대 갯수는?

<p>출처:<a href="http://kbase.redhat.com/faq/docs/DOC-6408">http://kbase.redhat.com/faq/docs/DOC-6408</a></p><p><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: 'Lucida Grande', Arial, Helvetica, sans-serif; line-height: normal; "><div class="jive-wiki-subject" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 15px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; overflow-x: hidden; overflow-y: hidden; clear: both; width: 718px; "><div class="jive-wiki-subject-content" style="margin-top: 0px; margin-right: 15px; margin-bottom: 0px; margin-left: 15px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; clear: both; "><div class="jive-wiki-subject-content-title" style="margin-top: 0px; margin-right: -130px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: block; float: left; width: 688px; overflow-x: hidden; overflow-y: hidden; "><div style="margin-top: 0px; margin-right: 130px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; display: block; float: left; "><h2 style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 5px; padding-left: 30px; color: rgb(51, 51, 51); font-weight: normal; font-size: 18pt; float: left; line-height: 28px; font-family: Georgia, serif; background-image: url(http://kbase.redhat.com/faq/images/jive-icon-wiki-24x24.gif); background-repeat: no-repeat; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: transparent; background-position: 0px 2px; ">resolv.conf에 등록할 수 있는 DNS name 서버의 최대 갯수는?</h2></div></div><h3 style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 15px; padding-left: 30px; color: rgb(102, 102, 102); font-weight: normal; font-size: 8pt; float: left; width: 688px; ">Article ID: 6408 <span style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 5px; padding-bottom: 0px; padding-left: 5px; ">-</span> Created on: Jul 19, 2007 6:00 PM <span style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 5px; padding-bottom: 0px; padding-left: 5px; ">-</span> Last Modified:  Nov 15, 2007 6:00 PM</h3></div></div><div class="jive-wiki-body" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 15px; padding-bottom: 15px; padding-left: 15px; clear: both; display: block; "><div class="jive-wiki-body-content" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 10px; padding-right: 0px; padding-bottom: 2px; padding-left: 0px; overflow-x: auto; overflow-y: hidden; width: 688px; background-image: url(http://kbase.redhat.com/faq/images/jive-div-dotted.gif); background-repeat: repeat-x; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: transparent; position: relative; background-position: 50% 0%; "><div class="jive-rendered-content" style="margin-top: 0px; margin-right: 0px; margin-bottom: 15px; margin-left: 0px; padding-top: 2px; padding-right: 2px; padding-bottom: 2px; padding-left: 2px; overflow-x: visible; overflow-y: visible; clear: both; position: relative; width: 681px; "><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">resolv.conf에 등록할 수 있는 최대 name server 개수는 3개이다.</p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">이 제한은 resolv.conf의 man page에 나타나 있다.이 값은 glibc 내에 (<span class="jive-noformat-content" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; font-family: monospace; ">MAXNS</span> in <span class="jive-noformat-content" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; font-family: monospace; ">/usr/include/resolv.h) 있고, 그래서 이값은 설정파일에서 수정될 수 없다. </span></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 8pt; height: 8pt; ">nslookup과 같은 어떤  프로그램은 <span class="Apple-style-span" style="font-family: monospace; ">resolv.conf 에 있는 extra name server로 동작할 수 있다. 그러나 다른 프로그램 대부분은 오직 resolv.conf에 처음 3개의 name server 작동할 것이다. 그리고  다른 name server들은 무시할 것이다.</span></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 8pt; height: 8pt; "><font class="Apple-style-span" face="monospace"><br></font></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 8pt; height: 8pt; "><br></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 8pt; height: 8pt; "><br></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></p><p style="line-height: 1.25em; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><br></p></div><div class="jive-wiki-details" style="margin-top: 2px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 14px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; border-top-width: 1px; border-top-style: solid; border-top-color: rgb(220, 220, 220); "><div class="jive-wiki-details-container" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><div class="jive-wiki-tags" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 16px; clear: both; font-size: 8pt; color: rgb(102, 102, 102); background-image: url(http://kbase.redhat.com/faq/images/jive-icon-tag-12x12.gif); background-repeat: no-repeat; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: transparent; background-position: 0% 50%; ">Tags: <a href="http://kbase.redhat.com/faq/community/en?view=tags&tags=networking" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: rgb(0, 102, 204); ">networking</a>, <a href="http://kbase.redhat.com/faq/community/en?view=tags&tags=web_server" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: rgb(0, 102, 204); ">web_server</a>, <a href="http://kbase.redhat.com/faq/community/en?view=tags&tags=ftp" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; color: rgb(0, 102, 204); ">ftp</a></div></div></div></div></div></span></p>