{"id":557,"date":"2021-09-01T00:27:57","date_gmt":"2021-08-31T21:27:57","guid":{"rendered":"https:\/\/www.yunuskaytan.com\/?p=557"},"modified":"2021-09-01T01:22:09","modified_gmt":"2021-08-31T22:22:09","slug":"ag-cihazlari-nelerdir","status":"publish","type":"post","link":"https:\/\/www.yunuskaytan.com\/en\/yk\/ag-cihazlari-nelerdir\/","title":{"rendered":"A\u011f Cihazlar\u0131 nelerdir?"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>A\u011f Cihazlar\u0131?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ring ve Bus topolojilerinde g\u00f6rd\u00fc\u011f\u00fcm\u00fcz gibi ilk ba\u015flarda bilgisayarlar\u0131 birbirine ba\u011flamak i\u00e7in herhangi bir a\u011f cihaz\u0131 kullan\u0131lm\u0131yordu. Sonraki y\u0131llarda a\u011flar\u0131n b\u00fc\u00ady\u00fcmesi ile ayn\u0131 yerel a\u011f \u00fczerindeki cihazlar\u0131 haberle\u015ftirmek i\u00e7in hub (da\u011f\u0131t\u0131c\u0131) ve switch (anahtar), farkl\u0131 a\u011flardaki cihazlar\u0131 haberle\u015ftirmek i\u00e7in de router (y\u00f6nlendi\u00adrici) kullan\u0131lmaya ba\u015fland\u0131.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Da\u011f\u0131t\u0131c\u0131 (Hub)<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Star (Y\u0131ld\u0131z) topolojide merkezde bulunan a\u011f cihaz\u0131d\u0131r. 4-8-16-24-48 vb. port olarak \u00fcretilir. Hublar bir portuna gelen sinyali gelen port hari\u00e7 di\u011fer t\u00fcm portlar\u0131na iletti\u011fi i\u00e7in a\u011f t\u0131kan\u0131kl\u0131klara ve \u00e7ak\u0131\u015fmalara neden olur. Her ne kadar bunlar\u0131 \u00f6nlemek i\u00e7in half duplex (tek y\u00f6nde ileti\u015fim) ve CSMA\/CD gibi mekanizmalar geli\u015ftirilse de switchlerin \u00fcretilmesiyle art\u0131k pek kullan\u0131lmamaktad\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Anahtar (Switch):<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Star topolojide a\u011f\u0131n merkezinde bulunan cihazd\u0131r. Genellikle 8-24 ve 48 port olarak \u00fcretilir. Y\u00f6netilebilen ve y\u00f6netilemeyen tipleri vard\u0131r. Hangi portunda hangi MAC adresine sahip hostun oldu\u011fu bilgisini i\u00e7eren bir MAC tablosu olu\u015fturarak g\u00f6nde\u00adren bilgisayardan gelen verinin sadece al\u0131c\u0131 bilgisayara gitmesini sa\u011flar. Bu nedenle full duplex (iki y\u00f6nl\u00fc) \u00e7al\u0131\u015fabilir ve hublardaki gibi \u00e7ak\u0131\u015fma meydana gelmez. G\u00fc\u00adn\u00fcm\u00fczde 100 Mbit- 1 Gbit- 10 Gbit ve 40 GBit h\u0131za sahip portlar\u0131 olan switchler \u00fcretilmi\u015f ve art\u0131k LAN\u2019lar\u0131n en temel a\u011f bile\u015feni haline gelmi\u015ftir.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"385\" height=\"149\" src=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/anahtar.png\" alt=\"\" class=\"wp-image-558\" srcset=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/anahtar.png 385w, https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/anahtar-300x116.png 300w\" sizes=\"auto, (max-width: 385px) 100vw, 385px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Y\u00f6nlendirici (Router)<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Farkl\u0131 yerel alan a\u011flar\u0131n\u0131 (LAN) birbirine ba\u011flayan a\u011f cihazlar\u0131na router denir. \u0130n\u00adternet olarak isimlendirdi\u011fimiz geni\u015f alan a\u011f\u0131 (WAN) binlerce router\u2019dan olu\u015fan bir a\u011fd\u0131r. \u015eekilde g\u00f6r\u00fcld\u00fc\u011f\u00fc gibi genellikle yanl\u0131\u015f olarak modem diye isimlendirilen bir kab\u00adlosuz eri\u015fim noktas\u0131 \u00f6zelli\u011fi de olan ADSL router g\u00f6r\u00fclmektedir. Bu router evimiz\u00addeki bilgisayarlar\u0131 \u0130nternet\u2019e y\u00f6nlendirir.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"246\" height=\"193\" src=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/yonlendiricirouter.png\" alt=\"\" class=\"wp-image-559\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>G\u00fcvenlik Duvar\u0131 (Firewall-UTM)<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00fcrk\u00e7e kelime kar\u015f\u0131l\u0131\u011f\u0131 olarak ate\u015f duvar\u0131 anlam\u0131na gelse de a\u011f\u0131m\u0131z\u0131 siber tehditlere kar\u015f\u0131 korudu\u011fu i\u00e7in g\u00fcvenlik duvar\u0131 olarak isimlendirilir. G\u00fcvenlik duvar\u0131 \u00f6zelli\u011fi d\u0131\u015f\u0131nda antivir\u00fcs gateway, web filtreleme, hotspot vb. bir\u00e7ok \u00f6zelli\u011fi ile art\u0131k UTM (Unified Threat Management-T\u00fcmle\u015fik G\u00fcvenlik Sistemi) olarak an\u0131lmaya ba\u015flan\u00adm\u0131\u015ft\u0131r. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"387\" height=\"128\" src=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/guvenlikduvari.png\" alt=\"\" class=\"wp-image-560\" srcset=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/guvenlikduvari.png 387w, https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/09\/guvenlikduvari-300x99.png 300w\" sizes=\"auto, (max-width: 387px) 100vw, 387px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>A\u011f Cihazlar\u0131? Ring ve Bus topolojilerinde g\u00f6rd\u00fc\u011f\u00fcm\u00fcz gibi ilk ba\u015flarda bilgisayarlar\u0131 birbirine ba\u011flamak i\u00e7in herhangi bir a\u011f cihaz\u0131 kullan\u0131lm\u0131yordu. Sonraki y\u0131llarda a\u011flar\u0131n b\u00fc\u00ady\u00fcmesi ile ayn\u0131 yerel a\u011f \u00fczerindeki\u2026<\/p>","protected":false},"author":1,"featured_media":440,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/comments?post=557"}],"version-history":[{"count":2,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/557\/revisions"}],"predecessor-version":[{"id":589,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/557\/revisions\/589"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/media\/440"}],"wp:attachment":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/media?parent=557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/categories?post=557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/tags?post=557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}