It is very difficult to remember a set of numbers(IP address) to connect to the Internet. The Domain Naming Service(DNS) is used to overcome this problem. It maps one particular IP address to a string of characters. For example, www. mascom. com implies com is the domain name reserved for US commercial sites, moscom is the name of the company and www is the name of the specific computer, which is mascom’s server.

It seems like there might be a slight confusion in the question. “Domain Naming Service” (DNS) is not typically associated with Core Java. DNS stands for Domain Name System, and it is a system used to translate human-readable domain names (like www.example.com) into IP addresses that computers use to identify each other on a network.

In the context of Core Java, you might be referring to something else related to Java programming or networking. If you have a different question about Core Java or DNS in a programming context, please provide more details, and I’ll be happy to help.