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It can also clear all infester DNS cache records, which help keep you safer on the web. That is why flushing the DNS cache can help with such issues. In this case, when you try to access it, the DNS records go to your browser's stored DNS cache and rely on the outdated information. Supposedly you are trying to access a website from a recently visited section, and you can not reach it, even though you know it is up and running. This is because a website might migrate to a new domain, which means its DNS address changes. Unfortunately, with your browser's storing DNS cache, you might sometimes not be able to access some websites that you already visited. DNS caching can also reduce CPU (Central Processing Unit) consumption. That is why when you go to the same website for a second time, you might notice it loading much quicker than the first time you visited. It is done so that the DNS query can be resolved faster as the need for requesting additional queries to other servers is eliminated as the browser's cache is the first step to check for requested DNS records. When you enter a web address into your browser's address bar, the Domain Name System translates the domain name into an IP address, and your browser, by default, caches and stores information of the site for a set amount of time. Even though this process can look complicated, it only takes a few milliseconds. Then, all the information about the site is sent back to the 'client', and you are then able to access the website. When this information is acquired, the request then goes on to the final server that holds the necessary information about the sites and their IP address - an authoritative DNS server.
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For example, that piece of information for is "pcrisk". When the query reaches the correct root server, it goes to a TLD (Top Level Domain) server, which has the second-level domain information, meaning it stores the website name that goes before top-level domains. The recursive resolver then sends a query to a root server, which has all information on top-level domains like. It also knows which other DNS servers it needs to contact to determine the web site's name with its IP address. This server is usually operated by your ISP (Internet Service Provider) or another third-party provider. For example, your device makes a request to the recursive resolver, known as recursive DNS server, when it wants to find the IP address associated with the domain name you have entered in your browser. The DNS recursor server is designed to receive inquiries from apps like web browsers. There are four DNS servers involved in this process: recursive DNS server, root server, TLD nameserver, and authoritative nameserver. It is the same with website addresses as the DNS directory matches the names to IP addresses. It is like a contact book on your phone that connects the contact's name to their phone number and email. It changed and improved throughout the years, but it is still used today to make our time on the internet more convenient.Īs briefly mentioned before, DNS is responsible for translating a hostname into an IP address. Later, in 1983, Paul Mockapetris, a computer scientist, created the Domain Name System. Due to the fast internet growth, as more people and devices started to join, it became quite hard to use IP addresses. In the early stages of the internet, it was way easier for users to use specific IP addresses as the network was very small. It is a naming system that turns a domain name, for example,, into an IP address (a unique label consisting of multiple characters). Thanks to the Domain Name System, or in short, DNS, you do not need to memorize complex IP addresses such as 1440:cb10:0088:1::b609:d7a2. When you want to visit a website, you usually enter the domain name into the browser's address, and your browser loads it, but web browsers use IP addresses to connect with websites.
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How to Clear DNS Cache on Your Mac And On Popular Browsers