{"id":21121,"date":"2026-05-06T22:10:47","date_gmt":"2026-05-06T19:10:47","guid":{"rendered":"https:\/\/sunucun.com.tr\/blog\/mx-a-cname-nedir\/"},"modified":"2026-05-06T22:11:10","modified_gmt":"2026-05-06T19:11:10","slug":"mx-a-cname-nedir","status":"publish","type":"post","link":"https:\/\/sunucun.com.tr\/blog\/mx-a-cname-nedir\/","title":{"rendered":"MX, A, CNAME Nedir?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/sunucun.com.tr\/blog\/mx-a-cname-nedir\/#DNS_Kayitlari_Nedir\" >DNS Kay\u0131tlar\u0131 Nedir?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/sunucun.com.tr\/blog\/mx-a-cname-nedir\/#A_Kaydi_Address_Record\" >A Kayd\u0131 (Address Record)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/sunucun.com.tr\/blog\/mx-a-cname-nedir\/#CNAME_Kaydi_Canonical_Name_Record\" >CNAME Kayd\u0131 (Canonical Name Record)<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>DNS (Domain Name System), internetin telefon rehberi olarak d\u00fc\u015f\u00fcn\u00fclebilir. \u0130nsanlar\u0131n hat\u0131rlamas\u0131 zor olan say\u0131sal IP adresleri yerine, kolayca hat\u0131rlanabilen alan adlar\u0131n\u0131 (web sitelerinin adreslerini) kullanmam\u0131z\u0131 sa\u011flar. Bir web taray\u0131c\u0131s\u0131na bir alan ad\u0131 yazd\u0131\u011f\u0131m\u0131zda, DNS sistemi bu alan ad\u0131n\u0131 ilgili IP adresine \u00e7evirir ve b\u00f6ylece do\u011fru sunucuya ula\u015fmam\u0131z\u0131 sa\u011flar. Bu \u00e7evirme i\u015flemi, \u00e7e\u015fitli t\u00fcrlerde DNS kay\u0131tlar\u0131 arac\u0131l\u0131\u011f\u0131yla ger\u00e7ekle\u015ftirilir. Her bir kay\u0131t t\u00fcr\u00fc, alan ad\u0131yla ilgili belirli bir bilgiyi depolar ve farkl\u0131 bir amaca hizmet eder. Bu kay\u0131tlar, alan ad\u0131n\u0131z\u0131n web sitesi, e-posta, alt alan adlar\u0131 ve di\u011fer hizmetlerinin do\u011fru \u015fekilde \u00e7al\u0131\u015fmas\u0131 i\u00e7in yap\u0131land\u0131r\u0131l\u0131r. DNS kay\u0131tlar\u0131 olmadan, internet sitelerine alan adlar\u0131yla eri\u015fmek veya e-posta g\u00f6ndermek m\u00fcmk\u00fcn olmazd\u0131.<\/p>\n<p><\/p>\n<figure class=\"wp-block-image aligncenter size-medium is-resized\">\n  <img src=\"https:\/\/sunucun.com.tr\/blog\/wp-content\/uploads\/2026\/05\/text-mx-a-cname-nedir-2.png\" class=\"size-medium aligncenter\" style=\"width:100%;\" alt=\"MX, A, CNAME Nedir? Alan adlar\u0131n\u0131n farkl\u0131 hedeflere y\u00f6nlendirilmesini sa\u011flayan temel DNS kay\u0131t t\u00fcrleri.\" title=\"DNS Kay\u0131t T\u00fcrlerinin \u0130\u015flevsel Farkl\u0131l\u0131klar\u0131\" loading=\"lazy\" decoding=\"async\"><figcaption>\n    MX, A, CNAME Nedir? Alan adlar\u0131n\u0131n farkl\u0131 hedeflere y\u00f6nlendirilmesini sa\u011flayan temel DNS kay\u0131t t\u00fcrleri.<br \/>\n  <\/figcaption><\/figure>\n<p>\nMX, A, CNAME Nedir? \u0130nternet d\u00fcnyas\u0131n\u0131n g\u00f6r\u00fcnmeyen ancak i\u015fleyi\u015fi i\u00e7in hayati \u00f6nem ta\u015f\u0131yan yap\u0131 ta\u015flar\u0131ndan biri de Alan Ad\u0131 Sistemi (DNS) kay\u0131tlar\u0131d\u0131r. Bir web sitesine eri\u015fmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131m\u0131zda veya bir e-posta g\u00f6nderdi\u011fimizde, arka planda karma\u015f\u0131k bir DNS sorgu zinciri \u00e7al\u0131\u015f\u0131r. Bu sistem, insan dostu alan adlar\u0131n\u0131 (\u00f6rne\u011fin, &#8220;example.com&#8221;) makinelerin anlayabilece\u011fi IP adreslerine (\u00f6rne\u011fin, &#8220;192.0.2.1&#8221;) \u00e7evirerek dijital d\u00fcnyan\u0131n d\u00fczg\u00fcn ak\u0131\u015f\u0131n\u0131 sa\u011flar. DNS kay\u0131tlar\u0131 aras\u0131nda en temel ve s\u0131k kullan\u0131lanlardan baz\u0131lar\u0131 A, CNAME ve MX kay\u0131tlar\u0131d\u0131r. Bu kay\u0131tlar, bir alan ad\u0131n\u0131n nereye y\u00f6nlendirilece\u011fini, hangi sunucuda bar\u0131nd\u0131r\u0131ld\u0131\u011f\u0131n\u0131 veya e-postalar\u0131n hangi sunuculara iletilece\u011fini belirler. Bu blog yaz\u0131s\u0131nda, bu \u00fc\u00e7 kritik DNS kayd\u0131n\u0131n ne oldu\u011funu, nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 ve internet altyap\u0131s\u0131ndaki rollerini ayr\u0131nt\u0131l\u0131 olarak inceleyece\u011fiz.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNS_Kayitlari_Nedir\"><\/span>DNS Kay\u0131tlar\u0131 Nedir?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"A_Kaydi_Address_Record\"><\/span>A Kayd\u0131 (Address Record)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A kayd\u0131, &#8220;Adres Kayd\u0131&#8221; anlam\u0131na gelir ve bir alan ad\u0131n\u0131 veya alt alan ad\u0131n\u0131 do\u011frudan bir IPv4 adresine e\u015fleyen en temel ve en yayg\u0131n kullan\u0131lan DNS kayd\u0131 t\u00fcr\u00fcd\u00fcr. Bir web sitesinin ana adresi veya bir alt alan ad\u0131 (\u00f6rne\u011fin, &#8220;www&#8221; veya &#8220;blog&#8221;), A kayd\u0131 arac\u0131l\u0131\u011f\u0131yla ilgili web sunucusunun IP adresine y\u00f6nlendirilir.<\/p>\n<ul>\n<li><strong>Tan\u0131m:<\/strong> Bir ana bilgisayar ad\u0131n\u0131 (hostname) kar\u015f\u0131l\u0131k gelen 32 bitlik bir IPv4 adresine ba\u011flar. Bu, istemcinin bir alan ad\u0131 kullanarak sunucunun fiziksel konumunu bulmas\u0131n\u0131 sa\u011flar.<\/li>\n<li><strong>\u00c7al\u0131\u015fma Prensibi:<\/strong> Kullan\u0131c\u0131 taray\u0131c\u0131s\u0131na &#8220;example.com&#8221; yazd\u0131\u011f\u0131nda, DNS \u00e7\u00f6z\u00fcmleyicisi ilgili A kayd\u0131n\u0131 arar. Bulunan A kayd\u0131, &#8220;example.com&#8221; adresinin 192.0.2.1 gibi bir IP adresine i\u015faret etti\u011fini g\u00f6sterir. Taray\u0131c\u0131 daha sonra bu IP adresine ba\u011flanarak web sitesi i\u00e7eri\u011fini \u00e7eker.<\/li>\n<li><strong>Kullan\u0131m Alanlar\u0131:<\/strong> \u00c7o\u011fu web sitesinin ana alan ad\u0131n\u0131 (example.com) ve s\u0131k kullan\u0131lan alt alan adlar\u0131n\u0131 (www.example.com) web sunucular\u0131n\u0131n IP adreslerine y\u00f6nlendirmek i\u00e7in kullan\u0131l\u0131r. Bir web sitesinin ayakta kalmas\u0131 ve eri\u015filebilir olmas\u0131 i\u00e7in A kayd\u0131 olmazsa olmazd\u0131r. IPv6 adresleri i\u00e7in ise AAAA kayd\u0131 kullan\u0131l\u0131r.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"CNAME_Kaydi_Canonical_Name_Record\"><\/span>CNAME Kayd\u0131 (Canonical Name Record)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CNAME kayd\u0131, &#8220;Canonical Name Record&#8221; veya &#8220;Kurall\u0131 Ad Kayd\u0131&#8221; anlam\u0131na gelir. Bir alan ad\u0131n\u0131 do\u011frudan bir IP adresine e\u015flemek yerine, ba\u015fka bir alan ad\u0131na e\u015fler. Bu, bir alan ad\u0131n\u0131n &#8220;takma ad\u0131&#8221; gibi i\u015flev g\u00f6rmesini sa\u011flar.<\/p>\n<ul>\n<li><strong>Tan\u0131m:<\/strong> Bir alan ad\u0131n\u0131 (takma ad\/alias) ba\u015fka bir alan ad\u0131na (kurall\u0131 ad\/canonical name) i\u015faret eder. Kurall\u0131 ad, daha sonra bir A kayd\u0131 veya ba\u015fka bir DNS kayd\u0131 arac\u0131l\u0131\u011f\u0131yla bir IP adresine \u00e7\u00f6z\u00fcmlenir.<\/li>\n<li><strong>\u00c7al\u0131\u015fma Prensibi:<\/strong> \u00d6rne\u011fin, &#8220;www.example.com&#8221; i\u00e7in bir CNAME kayd\u0131 olu\u015fturulup bunu &#8220;example.com&#8221; adresine i\u015faret edebilirsiniz. Bu durumda, birisi &#8220;www.example.com&#8221; adresine eri\u015fmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131nda, DNS \u00f6nce CNAME kayd\u0131n\u0131 bulur ve bunu &#8220;example.com&#8221; olarak \u00e7\u00f6z\u00fcmler. Ard\u0131ndan, &#8220;example.com&#8221; i\u00e7in tan\u0131mlanm\u0131\u015f A kayd\u0131n\u0131 bularak ilgili IP adresine y\u00f6nlendirme yapar.<\/li>\n<li><strong>Kullan\u0131m Alanlar\u0131 ve Avantajlar\u0131:<\/strong>\n<ul>\n<li><strong>Alt Alan Adlar\u0131 \u0130\u00e7in:<\/strong> &#8220;blog.example.com\\<br \/>\n<\/p>\n<figure class=\"wp-block-image aligncenter size-medium is-resized\">\n  <img src=\"https:\/\/sunucun.com.tr\/blog\/wp-content\/uploads\/2026\/05\/text2-mx-a-cname-nedir.png\" class=\"size-medium aligncenter\" style=\"width:100%;\" alt=\"MX, A, CNAME Nedir? DNS kay\u0131tlar\u0131n\u0131n temel i\u015flevleri ve \u00e7al\u0131\u015fma prensiplerindeki farkl\u0131l\u0131klar\u0131 g\u00f6steren bir g\u00f6rsel.\" title=\"DNS kay\u0131tlar\u0131 i\u015flev ve y\u00f6nlendirme farkl\u0131l\u0131klar\u0131\" loading=\"lazy\" decoding=\"async\"><figcaption>\n    MX, A, CNAME Nedir? DNS kay\u0131tlar\u0131n\u0131n temel i\u015flevleri ve \u00e7al\u0131\u015fma prensiplerindeki farkl\u0131l\u0131klar\u0131 g\u00f6steren bir g\u00f6rsel.<br \/>\n  <\/figcaption><\/figure>\n<p><\/p>\n<p>MX kay\u0131tlar\u0131n\u0131n \u00f6nceli\u011fi neden \u00f6nemlidir? \u00d6zellikle bir e-posta g\u00f6nderildi\u011finde, g\u00f6nderen sunucu, alan ad\u0131n\u0131n MX kay\u0131tlar\u0131n\u0131 sorgulayarak e-postay\u0131 teslim edebilecek posta sunucular\u0131n\u0131n listesini ve bunlar\u0131n \u00f6ncelik de\u011ferlerini al\u0131r. D\u00fc\u015f\u00fck \u00f6ncelik de\u011feri (daha k\u00fc\u00e7\u00fck say\u0131), o sunucunun daha tercih edilebilir oldu\u011funu g\u00f6sterir. Birden fazla MX kayd\u0131na sahip olmak ve bunlara farkl\u0131 \u00f6ncelik de\u011ferleri atamak, posta hizmetiniz i\u00e7in yedeklilik sa\u011flar. Birincil sunucunuz (d\u00fc\u015f\u00fck \u00f6ncelik numaras\u0131) \u00e7evrimd\u0131\u015f\u0131 oldu\u011funda, e-postalar otomatik olarak daha d\u00fc\u015f\u00fck \u00f6ncelikli yedek sunuculara y\u00f6nlendirilir ve bu da e-postalar\u0131n kaybolmas\u0131n\u0131 \u00f6nler.<\/p>\n<p>A, CNAME ve MX kay\u0131tlar\u0131, internetin ve \u00f6zellikle web sitelerinin ile e-posta hizmetlerinin temelini olu\u015fturan DNS sisteminin vazge\u00e7ilmez bile\u015fenleridir. Her biri farkl\u0131 bir amaca hizmet ederken, birlikte \u00e7al\u0131\u015farak alan adlar\u0131n\u0131n do\u011fru IP adreslerine ve hizmetlere y\u00f6nlendirilmesini sa\u011flarlar. Bu kay\u0131tlar\u0131n do\u011fru anla\u015f\u0131lmas\u0131 ve etkin bir \u015fekilde y\u00f6netilmesi, sorunsuz bir \u00e7evrimi\u00e7i deneyim i\u00e7in kritik \u00f6neme sahiptir. D\u00fczenli denetimler ve en iyi uygulamalar\u0131n takibi, dijital varl\u0131klar\u0131n\u0131z\u0131n g\u00fcvenli\u011fini ve eri\u015filebilirli\u011fini sa\u011flaman\u0131za yard\u0131mc\u0131 olacakt\u0131r. <a href=\"https:\/\/sunucun.com.tr\/blog\/dns-nedir-nasil-calisir\/\">DNS nedir, nas\u0131l \u00e7al\u0131\u015f\u0131r?<\/a> daha derinlemesine bilgi edinmek i\u00e7in bu konuya g\u00f6z atabilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DNS (Domain Name System), internetin telefon rehberi olarak d\u00fc\u015f\u00fcn\u00fclebilir. \u0130nsanlar\u0131n hat\u0131rlamas\u0131 zor olan say\u0131sal IP adresleri yerine, kolayca hat\u0131rlanabilen alan adlar\u0131n\u0131 (web sitelerinin adreslerini) kullanmam\u0131z\u0131 sa\u011flar. Bir web taray\u0131c\u0131s\u0131na bir alan ad\u0131 yazd\u0131\u011f\u0131m\u0131zda, DNS sistemi bu alan ad\u0131n\u0131 ilgili IP adresine \u00e7evirir ve b\u00f6ylece do\u011fru sunucuya ula\u015fmam\u0131z\u0131 sa\u011flar. Bu \u00e7evirme i\u015flemi, \u00e7e\u015fitli t\u00fcrlerde DNS kay\u0131tlar\u0131&hellip;<\/p>\n","protected":false},"author":1,"featured_media":21118,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1523],"tags":[],"class_list":["post-21121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-network"],"_links":{"self":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts\/21121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/comments?post=21121"}],"version-history":[{"count":1,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts\/21121\/revisions"}],"predecessor-version":[{"id":21122,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts\/21121\/revisions\/21122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/media\/21118"}],"wp:attachment":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/media?parent=21121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/categories?post=21121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/tags?post=21121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}