{"id":98373,"date":"2024-05-27T12:06:37","date_gmt":"2024-05-27T10:06:37","guid":{"rendered":"https:\/\/firstcolo.blackpeppers.de\/glossary\/vlan\/"},"modified":"2026-03-15T01:39:27","modified_gmt":"2026-03-15T00:39:27","slug":"vlan","status":"publish","type":"glossary","link":"https:\/\/firstcolo.blackpeppers.de\/en\/glossary\/vlan\/","title":{"rendered":"VLAN"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"98373\" class=\"elementor elementor-98373 elementor-48821\" data-elementor-post-type=\"glossary\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d721651 e-flex e-con-boxed e-con e-parent\" data-id=\"3d721651\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7ca50078 e-con-full e-flex e-con e-child\" data-id=\"7ca50078\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-548b25b2 e-con-full e-flex e-con e-child\" data-id=\"548b25b2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-3a8c6334 e-con-full e-flex e-con e-child\" data-id=\"3a8c6334\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10fca505 elementor-widget elementor-widget-heading\" data-id=\"10fca505\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">What is VLAN?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ef9dd2d elementor-widget elementor-widget-text-editor\" data-id=\"1ef9dd2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>VLAN (Virtual Local Area Network) allows a physical <a href=\"https:\/\/firstcolo.blackpeppers.de\/glossar\/netzwerk\" target=\"_blank\" rel=\"noopener\">network<\/a> to be divided into several logical networks. Each of these logical networks acts as an independent <a href=\"https:\/\/firstcolo.blackpeppers.de\/glossar\/lan\" target=\"_blank\" rel=\"noopener\">LAN<\/a> with its own broadcast domain. As a result, devices in different VLANs cannot communicate directly with each other, even if they are connected to the same physical <a href=\"https:\/\/firstcolo.blackpeppers.de\/glossar\/switch\" target=\"_blank\" rel=\"noopener\">switch<\/a>.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-20fbda31 e-flex e-con-boxed e-con e-parent\" data-id=\"20fbda31\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1db9d39f elementor-widget elementor-widget-heading\" data-id=\"1db9d39f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Distinction between physical and virtual LANs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a044a62 elementor-widget elementor-widget-text-editor\" data-id=\"7a044a62\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>A physical LAN separates networks physically using separate cables and switches. This method is often cumbersome, expensive, and inflexible, especially in large or dynamically growing organizations. VLANs offer the possibility of dividing a physical network into several logical segments without changing the physical infrastructure. This increases the flexibility and efficiency of network usage and allows administrators to easily manage network segments via software.   <\/p><p>Example: In an office building, a single switch can support multiple VLANs, such as one VLAN for employee PCs, one for IP telephony, and one for visitors. Although these networks are physically connected to the same switch, they are logically separated and can have different security policies and access rights. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-369aefd elementor-widget elementor-widget-heading\" data-id=\"369aefd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advantages and Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16976ee elementor-widget elementor-widget-text-editor\" data-id=\"16976ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Efficiency<\/strong>: They reduce data traffic by restricting broadcasts to the relevant VLAN.<\/li><li><strong>Flexibility<\/strong>: Devices can easily be moved from one network segment to another without having to make physical changes.<\/li><li><strong>Scalability<\/strong>: VLANs allow for easy network expansion, as new devices can be added logically.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0470157 elementor-widget elementor-widget-heading\" data-id=\"0470157\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Security<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a707c65 elementor-widget elementor-widget-text-editor\" data-id=\"a707c65\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>VLANs provide improved security by segmenting the network into isolated parts. This prevents sensitive information within one segment from reaching other network areas. An example of this is a separate VLAN for guest access (Guest WiFi). Visitors to a company thus have access to the internet, but not to the internal corporate network. This protects sensitive company data from unauthorized access.    <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-59334814 e-con-full e-flex e-con e-child\" data-id=\"59334814\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-699f5735 elementor-widget elementor-widget-button\" data-id=\"699f5735\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Homepage<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-294eb773 elementor-widget elementor-widget-button\" data-id=\"294eb773\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/firstcolo.blackpeppers.de\/en\/knowledge\/glossary\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Glossary<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A Virtual Local Area Network (VLAN) allows a physical network to be divided into several logical networks. <\/p>\n","protected":false},"author":43,"featured_media":97354,"menu_order":0,"template":"","meta":{"content-type":"","footnotes":""},"glossary-categories":[],"glossary-tags":[],"class_list":["post-98373","glossary","type-glossary","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What is VLAN? 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