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{"id":4611,"date":"2022-08-09T11:26:18","date_gmt":"2022-08-09T11:26:18","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=4611"},"modified":"2022-08-09T11:26:18","modified_gmt":"2022-08-09T11:26:18","slug":"what-is-apipa","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/networking\/what-is-apipa\/","title":{"rendered":"What is APIPA ?"},"content":{"rendered":"<ul>\n<li style=\"text-align: justify;\">APIPA- Automatic Private IP Addressing.<\/li>\n<li style=\"text-align: justify;\">It is a feature or characteristic in operating systems like windows which enables computers to self-configure an IP address and subnet mask automatically when their Dynamic Host Configuration Protocol (DHCP) server isn\u2019t reachable.<\/li>\n<li style=\"text-align: justify;\">APIPAs IP address is <strong>(169.254.0.1 to 169.254.255.254)<\/strong> having 65,534 usable IP addresses, with the subnet mask of 255.255.0.0.<\/li>\n<li style=\"text-align: justify;\">Internet Engineering Task Force (IETF) has initially reserved the IPV4 address block <strong>254.0.0\/16 (169.254.0.0 \u2013 169.254.255.255)<\/strong> for link-local addressing.<\/li>\n<li style=\"text-align: justify;\">From DHCP server the link-local addresses are allocated to interface in nature such that communication will be established while not getting a response.<\/li>\n<li style=\"text-align: justify;\">Then Microsoft refers to this address autoconfiguration method as Automatic Private IP Addressing (APIPA).<\/li>\n<li style=\"text-align: justify;\">The Automatic Private IP Address (APIPA) provides the configuration to check for the presence of a DHCP server in every five minutes, stated by Microsoft).<\/li>\n<li style=\"text-align: justify;\">At network configuration area if APIPA detects a DHCP server, it stops and let run the DHCP server that replaces APIPA with dynamically allocated addresses.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-4613 aligncenter\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address.png\" alt=\"\" width=\"885\" height=\"664\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address.png 885w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address-300x225.png 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address-768x576.png 768w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address-240x180.png 240w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address-390x293.png 390w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/automatic-private-ip-address-820x615.png 820w\" sizes=\"(max-width: 885px) 100vw, 885px\" \/><\/p>\n<p style=\"text-align: justify;\">\n","protected":false},"excerpt":{"rendered":"<p>APIPA- Automatic Private IP Addressing. It is a feature or characteristic in operating systems like windows which enables computers to self-configure an IP address and subnet mask automatically when their Dynamic Host Configuration Protocol (DHCP) server isn\u2019t reachable. APIPAs IP address is (169.254.0.1 to 169.254.255.254) having 65,534 usable IP addresses, with the subnet mask of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[4590],"tags":[17863,17864,17865,17862,17857,17860,17855,17861,17866,17867,17870,17868,17869,17859,17858,17856],"class_list":["post-4611","post","type-post","status-publish","format-standard","hentry","category-networking","tag-169-254-apipa","tag-apipa-resolution","tag-apipa-troubleshooting","tag-apipa-vs-dhcp","tag-definition-of-apipa","tag-is-apipa-routable","tag-what-is-apipa","tag-what-is-apipa-169-ip-address","tag-what-is-apipa-address","tag-what-is-apipa-address-range","tag-what-is-apipa-and-how-is-it-configured","tag-what-is-apipa-how-would-you-recognize-it","tag-what-is-apipa-in-packet-tracer","tag-what-is-apipa-ip-address","tag-what-is-apipa-range","tag-what-is-automatic-private-ip-addressing-apipa"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is APIPA ? 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