Exam (elaborations)
DNS Domain Name System
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DNS Domain Name System
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9/18/24, 2:11 DNS Domain NamePM System
DNS Domain Name
System
An application layer protocol defines how the application processes running
on different systems, pass the messages to each other.
o DNS stands for Domain Name System.
o DNS is a directory service that provides a mapping between the
name of a host on the network and its numerical address.
o DNS is required for the functioning of the internet.
o Each node in a tree has a domain name, and a full domain name is a
sequence of symbols specified by dots.
o DNS is a service that translates the domain name into IP addresses.
This allows the users of networks to utilize user-friendly names when
looking for other hosts instead of remembering the IP addresses.
o For example, suppose the FTP site at EduSoft had an IP address of
132.147.165.50, most people would reach this site by specifying
ftp.EduSoft.com. Therefore, the domain name is more reliable than IP
address.
DNS is a TCP/IP protocol used on different platforms. The domain name space
is divided into three different sections: generic domains, country domains,
and inverse domain.
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