Roles Of Dns Domain Name System

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Roles of DNS Domain Name System (DNS) provides access to a specific server through the use of a domain name on TCP/IP networks. For example the internet is a TCP/IP network and one of the features is the ability to brows different web pages just by typing the name of the domain you want to access. The DNS then uses the name that you have provided and looks up the computers IP address and direct your connection to that computer. Without DNS I would need to know that 173.194.219.113 is the IP address of google.com just to access their page. Also some web pages may have multiple IP addresses and provide access to users based on their location to the server closest to them, but we still only type in google.com into the address bar. Also the DNS database is distributed across multiple domains; this ensures that should a part of the internet go down you connection can still reach the desired destination. The data contained within the DNS server is not only information about the various hosts but also the different DNS servers connected to the network (Microsoft.com, 2008). DNS is also used internally inside networks to provide the same features as on the internet. You may access a file server on your network by using the name Fileserver1. Once again this is easier to remember for users than the file servers IP address with could be xxx.xxx.xxx.xxx for an IPV4 address or FE80:0000:0000:0000:0202:B3FF:FE1E:8329 for an IPV6 address, and most places have more than one server
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