Brianna

DNS is a system that allows computers to look up the name of a resource, such as a website, on the internet. DNS is used by computers to translate domain names, such as example.

com, into the IP addresses needed to access the website.

DNS can be unreliable and slow. When a user types in a domain name, such as example.com, their computer looks up the DNS records for that domain name. If the DNS server is unavailable, the computer will use the DNS records for the parent domain, such as google.

com. If the DNS server is also unavailable, the computer will use the DNS records for the default domain, such as comcast.net.

DNS can also be unreliable because it can be subject to attacks. For example, hackers can use DNS servers to redirect users to websites that are phishing scams.

DNS can also be slow because it can take a long time for a computer to lookup a DNS record.