Want this question answered?
What resolves a website URL to an IP address? DNS Sever
A DNS address is the address to a server that converts a URL to an IP address. Most DNS address' are provided by your ISP, although there are many free DNS servers available.
Domain name system is an application layer service . DNS provides mapping between addresses and names . DNS is what maps URL to the Addresses .
DNS provides mapping of ip addresses to name. DNS is short from of Domain name system . DNS provides name to Ip address and that name is called as URL.
The main advantage to DNS is that Internet users only need to know the URL instead of the IP address to get to a website. The main disadvantage with DNS is that there may be problems finding the correct website when the IP address of that site changes.
the DNS
When you type the web address in browser, your computer connects to the DNS server in your ISP provider location, The DNS server in ISP tries to locate the IP address of the web page you requested. If it fails, then the request is forward to another DNS server until the IP address is resolved by one of the DNS server. Once IP address is located, browser contacts the web server using the IP and request for the resource.
The universal resource locator (URL) of a web page is the IP address of the server and the path of the web page upon that server. The IP address may be mapped to a domain name registered with a domain name service (DNS), thus we can use the IP address or the domain name to identify the server.
The URL address of any webpage will be in the top bar on the browser.
There are many ways that the destination IP address can be discovered, either by sending a broadcast packet asking for a specific service, or by out-of-band prearrangement, but the most common in everyday use is by means of DNS. Given the URL of a network resource, the sending device requests the IP address of the resource from the DNS resolver that it has been given. The DNS resolver either knows the answer and passes it back, or else forwards the request to another DNS resolver. The IP address of that resource is eventually returned, and is then used in addressing the packets of interest.
You are getting the dns error because ther is no website or URL with the name ydhmrxd.com so dns cannot resolve it to any IP so its shows an error.
A Domain Name Server is a standard technology for managing the names of Web sites and other Internet domains. DNS technology allows you to type names into your Web browser like compnetworking.about.com and your computer to automatically find that address on the Internet. A key element of the DNS is a worldwide collection of DNS servers.A DNS server is any computer registered to join the Domain Name System. A DNS server runs special-purpose networking software, features a public IP address, and contains a database of network names and addresses for other Internet hosts.