![]() If this LAN has a local DNS server, the server that resolves the address for the first user could cache the address. Then a different person, sitting at a different computer, visits the same site. Imagine that there are four family members in a home LAN, and two are browsing the Internet at the same time. Running your own DNS server in your own premises gives you a lot of flexibility. See Table 1 for a list of some third-party DNS providers.Ī third-party provider could help you with performance and parental control, but if you want to customize the DNS environment, you will need to set up your own server. Parental controls that filter sites deemed unsafe for kids are also offered by some DNS providers. Many DNS providers offer anti-advertisement, anti-malware, and anti-phishing protection in such a way that, if your browser tries to resolve the address of some service known to serve advertisements or harmful code, it will be redirected to a bogus address or a site with a warning. ![]() Another option is for the server to return the address of a webpage that displays a message such as "No Social Networking Allowed Here." The easiest way to prevent a user from reaching a website is to instruct the DNS server to return a bogus address or to return an NXDOMAIN message, which means the server doesn't think the domain exists. For instance, a school administrator might wish to prevent students from accessing social networking sites such as during the school day. ![]() If your ISP's DNS servers are slow, switching to faster servers will lead to noticeable improvement in your web browsing experience.Īnother reason for switching to a different server is to avoid (or enforce) soft censorship. Simply put: some servers have lower latency and faster query times than others. The most popular reason why some users prefer a non-default DNS server is performance. Using your ISP's DNS server is an easy and low-stress option, but in many situations, it also has some disadvantages. For many users, this query is sent to a DNS server provided by the user's Internet Service Provider (ISP). When you turn your home computer on, launch a web browser, and instruct it to visit the website, your computer sends a DNS query, asking for the IP address associated with the name.
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