{"id":199931,"date":"2025-03-13T05:02:05","date_gmt":"2025-03-13T05:02:05","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=199931"},"modified":"2025-03-13T05:02:08","modified_gmt":"2025-03-13T05:02:08","slug":"what-subnet-mask-is-represented-by-the-slash-notation-20","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/13\/what-subnet-mask-is-represented-by-the-slash-notation-20\/","title":{"rendered":"What subnet mask is represented by the slash notation \/20"},"content":{"rendered":"\n<p>What subnet mask is represented by the slash notation \/20?<\/p>\n\n\n\n<p>255.255.255.248<br>255.255.224.0<br>255.255.240.0<br>255.255.255.0<br>255.255.255.192<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The subnet mask represented by the slash notation \/20 is <strong>255.255.240.0<\/strong>. This is determined by converting the CIDR (Classless Inter-Domain Routing) notation to its corresponding dotted-decimal subnet mask.<\/p>\n\n\n\n<p><strong>Understanding CIDR Notation:<\/strong><\/p>\n\n\n\n<p>CIDR notation specifies the number of bits used for the network portion of an IP address. In the case of \/20, it indicates that the first 20 bits are allocated for the network address, leaving the remaining 12 bits for host addresses within that network.<\/p>\n\n\n\n<p><strong>Converting \/20 to Dotted-Decimal Notation:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Binary Representation:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A standard IPv4 address is 32 bits long, divided into four octets (8 bits each).<\/li>\n\n\n\n<li>A \/20 subnet mask means the first 20 bits are set to 1, and the remaining 12 bits are set to 0.<\/li>\n\n\n\n<li>This results in the following binary sequence:<br><code>11111111.11111111.11110000.00000000<\/code><\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Decimal Conversion:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Convert each octet from binary to decimal:\n<ul class=\"wp-block-list\">\n<li>First octet: 11111111 \u2192 255<\/li>\n\n\n\n<li>Second octet: 11111111 \u2192 255<\/li>\n\n\n\n<li>Third octet: 11110000 \u2192 240<\/li>\n\n\n\n<li>Fourth octet: 00000000 \u2192 0<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Thus, the subnet mask in decimal form is 255.255.240.0.<\/li>\n<\/ul>\n\n\n\n<p><strong>Matching with Provided Options:<\/strong><\/p>\n\n\n\n<p>Among the given options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>255.255.255.248<\/strong><\/li>\n\n\n\n<li><strong>255.255.224.0<\/strong><\/li>\n\n\n\n<li><strong>255.255.240.0<\/strong><\/li>\n\n\n\n<li><strong>255.255.255.0<\/strong><\/li>\n\n\n\n<li><strong>255.255.255.192<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The correct match is <strong>255.255.240.0<\/strong>, corresponding to the \/20 subnet mask.<\/p>\n\n\n\n<p><strong>Explanation of Other Options:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>255.255.255.248 (\/29):<\/strong><\/li>\n\n\n\n<li>Provides 6 host addresses (2^3 &#8211; 2).<\/li>\n\n\n\n<li><strong>255.255.224.0 (\/19):<\/strong><\/li>\n\n\n\n<li>Provides 8,190 host addresses (2^13 &#8211; 2).<\/li>\n\n\n\n<li><strong>255.255.255.0 (\/24):<\/strong><\/li>\n\n\n\n<li>Provides 254 host addresses (2^8 &#8211; 2).\ue206<\/li>\n\n\n\n<li><strong>255.255.255.192 (\/26):<\/strong><\/li>\n\n\n\n<li>Provides 62 host addresses (2^6 &#8211; 2).<\/li>\n<\/ul>\n\n\n\n<p>These options correspond to different subnet sizes and do not match the \/20 subnet mask.<\/p>\n\n\n\n<p><strong>Summary:<\/strong><\/p>\n\n\n\n<p>A \/20 subnet mask translates to 255.255.240.0 in dotted-decimal notation. This subnet mask allows for 4,096 IP addresses (2^12), with 4,094 usable for hosts after reserving the network and broadcast addresses. This configuration is commonly used in networks requiring a moderate number of host addresses.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What subnet mask is represented by the slash notation \/20? 255.255.255.248255.255.224.0255.255.240.0255.255.255.0255.255.255.192 The correct answer and explanation is : The subnet mask represented by the slash notation \/20 is 255.255.240.0. This is determined by converting the CIDR (Classless Inter-Domain Routing) notation to its corresponding dotted-decimal subnet mask. Understanding CIDR Notation: CIDR notation specifies the number of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-199931","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=199931"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199931\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=199931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=199931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=199931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}