{"id":5462,"date":"2025-08-12T06:32:30","date_gmt":"2025-08-12T06:32:30","guid":{"rendered":"https:\/\/iprovpn.com\/blog\/?p=5462"},"modified":"2025-08-14T10:20:10","modified_gmt":"2025-08-14T10:20:10","slug":"dos-vs-ddos-attack","status":"publish","type":"post","link":"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/","title":{"rendered":"DoS vs. DDoS Attack: The Key Differences and Preventions"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">DoS vs. DDoS Attack: A DoS attack overwhelms a server, blocking a website. DDoS, a team of computers, does the same. Both aim to disrupt services by overloading servers or web apps. To find out more about Dos Vs. DDoS attacks are discussed below.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">        <div class=\"iprovpn_btn_cta_row\">\n    \t<a class=\"btn_cta\" href=\"https:\/\/iprovpn.com\/buy-vpn\" title=\"Get iProVPN Now\">Get iProVPN NOW <i class=\"fas fa-long-arrow-alt-right\"><\/i><\/a>\n    \t<\/div>\n    <\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_67_1 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<div class=\"ez-toc-title \" >Table of Contents<\/div>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#What_should_you_know_about_DDoS_attacks\" title=\"What should you know about DDoS attacks?\">What should you know about DDoS attacks?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#What_is_a_DoS_Attack\" title=\"What is a DoS Attack?\">What is a DoS Attack?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#What_is_the_difference_between_a_working_of_DOS_a_DDoS_Attack\" title=\"What is the difference between a working of DOS &amp; a DDoS Attack?\">What is the difference between a working of DOS &amp; a DDoS Attack?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#How_to_determine_if_a_Computer_is_affected_by_a_DoS_attack\" title=\"How to determine if a Computer is affected by a DoS attack?\">How to determine if a Computer is affected by a DoS attack?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#DoS_vs_DDoS_Attack_The_Key_Differences\" title=\"DoS vs. DDoS Attack: The Key Differences\">DoS vs. DDoS Attack: The Key Differences<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Types_of_DoS_Attacks_and_DDoS_Attacks\" title=\"Types of DoS Attacks and DDoS Attacks\">Types of DoS Attacks and DDoS Attacks<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Teardrop_Attack\" title=\"Teardrop Attack\">Teardrop Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Flooding_Attack\" title=\"Flooding Attack\">Flooding Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Application-based_Attack\" title=\"Application-based Attack\">Application-based Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Protocol_Attack\" title=\"Protocol Attack\">Protocol Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Volumetric_Attack\" title=\"Volumetric Attack\">Volumetric Attack<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Prevention_from_DoS_and_DDoS_Attacks\" title=\"Prevention from DoS and DDoS Attacks?\">Prevention from DoS and DDoS Attacks?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Testing_of_DoS_Attack\" title=\"Testing of DoS Attack\">Testing of DoS Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Create_a_Backup_plan\" title=\"Create a Backup plan.\">Create a Backup plan.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Calculate_the_Possible_Harm\" title=\"Calculate the Possible Harm\">Calculate the Possible Harm<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Know_the_consequences\" title=\"Know the consequences\">Know the consequences<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Conclusion\" title=\"Conclusion\u00a0\">Conclusion\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/#Start_Browsing_Privately_iProVPN_encrypts_your_data_for_protection_against_hackers_and_surveillance_Unblock_your_favorite_streaming_platforms_instantly_with_the_best_VPN_for_streaming_Get_iProVPN_NOW\" title=\"    \t\n        \n            \n                \n                    Start Browsing Privately!\n                    iProVPN encrypts your data for protection against hackers and surveillance. Unblock your favorite streaming platforms instantly with the best VPN for streaming.\n                \n                \n                    Get iProVPN NOW\n                \n            \n    \t\n    \">    \t\n        \n            \n                \n                    Start Browsing Privately!\n                    iProVPN encrypts your data for protection against hackers and surveillance. Unblock your favorite streaming platforms instantly with the best VPN for streaming.\n                \n                \n                    Get iProVPN NOW\n                \n            \n    \t\n    <\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_should_you_know_about_DDoS_attacks\"><\/span><strong>What should you know about DDoS attacks?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A DDoS attack is done when hackers use multiple devices to send a lot of traffic to your website, which ultimately slows down the loading time of the website you are trying to check out.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_a_DoS_Attack\"><\/span><strong>What is a DoS Attack?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A Denial of Service attack is done from a single source, in which hackers use tools to send continuous streams of UDP and TCP packets to the website servers. This overloads the website with fake traffic, making the website inaccessible to other users. DoS is simple to execute and is a very common type of cyber threat.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_a_working_of_DOS_a_DDoS_Attack\"><\/span><strong>What is the difference between a working of DOS &amp; a DDoS Attack?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A DoS attack occurs when a hacker attacks a website server using a single device or sends fake requests to the website. As discussed, this slows down the website\u2019s performance or even crashes the site. However, a DDoS attack is done the same way; the only difference is that attackers use more than one device. This is why the source of the DDoS attack is difficult to identify.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_determine_if_a_Computer_is_affected_by_a_DoS_attack\"><\/span><b>How to determine if a Computer is affected by a DoS attack?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Determining from which source the attack is done is challenging; however, there are some ways or hints that let you know if an attack takes place. For instance, you might encounter a poor internet connection or the website you wanted to access <\/span><a href=\"https:\/\/iprovpn.com\/resources\/how-to-increase-upload-speeds\/\"><span style=\"font-weight: 400;\">suddenly slows down<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Moreover, if all your devices stop working over the internet, then there&#8217;s a chance of a DoS attack. If you face such an issue, check the security issues of your network. Thesee attacks overload the website with false traffic.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"DoS_vs_DDoS_Attack_The_Key_Differences\"><\/span><b>DoS vs. DDoS Attack: The Key Differences<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<tbody>\n<tr>\n<td><b>Features<\/b><\/td>\n<td><b>DoS Attack<\/b><\/td>\n<td><b>DDoS Attack<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>Definition<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Overload the server with traffic from a single device<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Overload websites with multiple sources.<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Difficulty level<\/b><\/td>\n<td><span style=\"font-weight: 400;\">A basic hacker can do these kinds of attacks using online tools.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">A technical hacker can use a DDoS attack. As it uses more devices.<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Traffic<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Low amount of traffic.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">A huge amount of traffic is sent.<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>Detection<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Easy to detect this attack, which uses one source.<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Tough to find the initiation point of this attack, a lot of sources.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Types_of_DoS_Attacks_and_DDoS_Attacks\"><\/span><b>Types of DoS Attacks and DDoS Attacks<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Both of these attcaks, DoS and DDoS, can change to any other form; it&#8217;s up to the hacker how they want to overwhelm the traffic. This is done to damage any growing company&#8217;s reputation. Here are some types of attacks:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Teardrop_Attack\"><\/span><b>Teardrop Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">In a teardrop DoS attack, the attacker sends broken pieces of data to a network. The network tries to put these pieces back together, but the tricky design of the pieces confuses the system. Trying to rebuild them exhausts the system, causing it to crash.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Flooding_Attack\"><\/span><b>Flooding Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A flooding attack in a DoS attack sends lots of connection requests to a server, but doesn&#8217;t finish the handshake. <\/span>It&#8217;s like sending too much of requests, just like a phone tag game; however, when the <a href=\"https:\/\/iprovpn.com\/servers\">server<\/a> responds. The cyber attacker does not answer. By this, the server gets busy and can even crash due to a lot of requests.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Application-based_Attack\"><\/span><b>Application-based Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">An application-based attack, part of DDoS, focuses on Layer 7 of the OSI model. A case is the Slowloris attack, where the attacker sends incomplete HTTP requests, periodically sending HTTP headers. This ties up network resources.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Protocol_Attack\"><\/span><b>Protocol Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A protocol attack, part of a DDoS attack, targets Layers 3 and 4 in the OSI model. For instance, an attacker might manipulate the TCP connection sequence, sending requests but not responding as normal, or using a fake source<\/span><a href=\"https:\/\/iprovpn.com\/blog\/what-is-an-ip-address\/\"> <span style=\"font-weight: 400;\">IP address<\/span><\/a><span style=\"font-weight: 400;\"> in the reply. Unanswered requests eat up network resources, making them unavailable.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Volumetric_Attack\"><\/span><b>Volumetric Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A volumetric attack in DDoS aims at bandwidth resources. An example is when a botnet, controlled by the attacker, sends lots of request packets to a network. This overwhelms the bandwidth with ICMP echo requests, making services slow down or stop completely.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Prevention_from_DoS_and_DDoS_Attacks\"><\/span><b>Prevention from DoS and DDoS Attacks?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Both DoS and DDoS attacks are dangerous, and knowing the prevention steps is necessary. Here<\/span><span style=\"font-weight: 400;\">\u00a0are the following steps that you can use to stay safe from these attacks.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Testing_of_DoS_Attack\"><\/span><b>Testing of DoS Attack<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Practice on a simulation of how DoS works, and what happens when this attack occurs in your system. This is the right practice to do to get more familiar with these attacks. This will let you know the steps to take after.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Create_a_Backup_plan\"><\/span><b>Create a Backup plan.<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Planning what to do after an attack is important, as it includes how to secure data when DoS or DDoS attacks take place. Make sure to have the right team ready who can take quick action once they find an attack on the network. You can use an <\/span><a href=\"https:\/\/zenduty.com\/product\/oncall-management\/\"><span style=\"font-weight: 400;\">On-call management<\/span><\/a><span style=\"font-weight: 400;\"> tool that helps you collaborate with the team on the spot.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Calculate_the_Possible_Harm\"><\/span><b>Calculate the Possible Harm<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Knowing about the harm caused by DoS is necessary; it&#8217;s crucial to know the most affected point in the network.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Know_the_consequences\"><\/span><b>Know the consequences<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">After going through any of the attacks, the DDoS or the DoS attacks, check in detail what harm has been done to the system. This can be your learning as well to understand the weakness in the network. And later, if it occurs again, then you may know how to deal with the issue in real time.<\/span><\/p>\n<p><b>Check Network<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Make sure to test and check out your <\/span><a href=\"https:\/\/iprovpn.com\/resources\/can-wifi-owner-see-what-sites-i-visit-on-my-phone\/\"><span style=\"font-weight: 400;\">network <\/span><\/a><span style=\"font-weight: 400;\">regularly. When hackers know the system isn&#8217;t looked after daily, most likely they find it their perfect target. If the network is monitored closely every day, then you may get a hint if an attack could happen.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><b>Conclusion\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Concluding DoS vs DDoS Attack, by knowing that you should be aware of both of these attacks, since they are very common. A DoS attack is done using a single source, and it\u2019s a bit easier for the experts to know where the attack is initiated.<\/span><span style=\"font-weight: 400;\">DDoS attacks are done by more than one device, and so they are difficult to track. DoS and DDoS attacks both slow down the performance of the site you are accessing.<\/span><span style=\"font-weight: 400;\"> The best way to deal with both of these attacks is to know the prior measures to take once the attack occurs on the network. This way, your team will know what protective measures to take.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Start_Browsing_Privately_iProVPN_encrypts_your_data_for_protection_against_hackers_and_surveillance_Unblock_your_favorite_streaming_platforms_instantly_with_the_best_VPN_for_streaming_Get_iProVPN_NOW\"><\/span><span style=\"font-weight: 400; font-size: 16px;\">    \t<hr class=\"mt-5\">\n        <div class=\"custom_CTA mt-5\">\n            <div class=\"row\">\n                <div class=\"col-lg-7 align-self-center text-lg-left text-center\">\n                    <h3>Start Browsing Privately!<\/h3>\n                    <p clas=\"mb-0\">iProVPN encrypts your data for protection against hackers and surveillance. Unblock your favorite streaming platforms instantly with the best VPN for streaming.<\/p>\n                <\/div>\n                <div class=\"col-lg-5 align-self-center text-center\">\n                    <a class=\"custom_btn_cta\" href=\"https:\/\/iprovpn.com\/buy-vpn\" title=\"Get iProVPN Now\">Get iProVPN NOW<\/a>\n                <\/div>\n            <\/div>\n    \t<\/div>\n    <\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>DoS vs. DDoS Attack: A DoS attack overwhelms a server, blocking a website. DDoS, a team of computers, does the same. Both aim to disrupt services by overloading servers or web apps. To find out more about Dos Vs. DDoS attacks are discussed below.\u00a0 What should you know about DDoS attacks? A DDoS attack is [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":12858,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-5462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-privacy-security"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DoS vs. DDoS Attack: The Key Differences and Preventions<\/title>\n<meta name=\"description\" content=\"DoS vs. DDoS Attack: Discover the differences between DoS and DDoS attacks, and learn how to protect yourself.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/iprovpn.com\/blog\/dos-vs-ddos-attack\/\" \/>\n<meta property=\"og:locale\" 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