How DNS Works in Computer Networking

How DNS Works in Computer Networking
Are you running a network of over two computers over a public network? Then you must be aware of the Domain Name System (DNS) and how it translates IP addresses into Internet domains and hostnames and vice versa.

As you browse the internet, you only need to type the names of the websites you’re trying to access in the web browser address bar, and the DNS will automatically convert it into the corresponding IP address of the servers hosting that site. Large corporations use DNS to manage their internal intranet. However, home networks use Domain Name System when connecting to the internet but not for managing the names of their home computers.

How does Domain Name System Work?

DNS works as a client/server network communication system where users send requests and receive responses from the server. Forward domain name server lookup is a request comprising of names that will return a response of an IP address while a reverse domain name server lookup is a request that carries an IP address that returns a name. DNS provides a distributed database that stores such names and the last-known address of any public host on the Internet.

The DNS database is hosted on a hierarchy of specialized database servers. Whenever users make requests about Internet host names, the Domain Name Server resolver contacts the server and determined the IP address. If the required mapping is not contained in the server, it will refer to a different server in the next level of the hierarchy.

Additionally, Domain Name Server supports caching requests and provide redundancy for your network. Most operating systems allow developers to configure primary, secondary, and tertiary domain servers through which clients can send the initial request.

How to Set Up Domain Name Server on Home Networks and Personal Devices

Internet Service Providers (ISPs) usually run their own domain servers and utilize DHCP for automatic configuration of customer networks. To relieve the burden on domain server configuration, you can use automatic domain server assignment. As a home network administrator, you don’t have to keep your ISP settings, although some users prefer using available public network domain services.

Summary

It can be quite difficult to troubleshoot issues to do with Domain Name Servers due to its wide geographical distribution. However, even if the server link is broken, you can still connect to your local network to access remote devices using their names. If your network settings indicate DNS-server address as 0.0.0.0, then there’s a failure with domain server, or its configuration to the local network is wrong. Additional resources can be found at www.bluecatnetworks.com.