IP addresses are used now (IP version 4) is formed in a long number format 32-bit integer are grouped into four groups (each group, each consisting of 8 bits). When a TCP / IP network has many hosts, it is not easy for humans to remember IP addresses available. That's why these IP addresses need to be mapped into names that humans can remember easily by using DNS.
DNS also is the heart of a very important role. Whenever we meggunakan internet in our daily activities, then every time it also indirectly we use DNS (Domain Name System). The use of the DNS in the Internet include email applications (electronic mail), browsing, ssh / telnet, ftp, and other applications that have anything to do with the internet. Therefore, knowledge and understanding of the DNS is an important thing to be owned by the operator as well as Internet users.
What is DNS (Domain Name System)
Some understanding of the domain name system is.
1. Is a service application on the internet to translate domain names into IP addresses and vice versa.
2. The computers are connected and have the responsibility to provide information zone of your domain name, change the domain name into an IP address and also has responsibility for mail distribution in mail servers relating to the domain name.
3. It is a distributed database system that is used to search the computer name on the network using TCP / IP. DNS has the advantage of unlimited database size and also has good performance.
4. Applications that help map the host name to an IP address on a computer connected to the Internet applications such as web browsers or e-mail.
domain name google.com has the IP address 216.58.196.78, surely remember the name of the computer easier than remembering IP addresses. In the DNS, a name server will contain information about hosts on a region / zone. Name this server can access other servers to retrieve the data hosted on other areas. Name server will provide information to clients in need, called resolvers.
DNS may be analogous to the use of the phone book where people who want us to contact, to contact her by name and telephone number by pressing the number from the phone book. This occurs because the computer works based on figures, and people are more likely to work based on the name.
Main functions of the DNS system
1. Provide a host of information about an entire network to the Internet. DNS has advantages such as:
2. Easy, very easy to control because the user no longer be bothered to remember the IP address of a computer is quite a host name (Computer name).
3. Consistent, IP address of a computer host name should be changed but not changed. Example:
- UGM.ac.id has IP 175.111.88.11, then changes into 175.111.88.25, then the client side as if there was never any incident that has changed IP.
- Simple, user uses only one domain name to look good on the Internet or Intranet.
4. Translating hostnames (hostnames) to IP number (IP address), or vice versa, so the name is easy to remember by Internet users.
Similarly, information Function Definition and DNS (Domain Name System), may be useful for all of us. I'll see you again at the next information.
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