User:Aida/essay2s

I take the view that for accessing easily. domain name are arranged in subordinate levels of the DNS root domain as well as they are included top level and generic level.nowadays Internet Corporation for Assigned Names and Numbers(ICANN) expands spaces 's architecture of DNS that they are consisted of trees, trees are subset of nodes in DNS Zone.DNS has lots of advantages also one of the important of advantage is easy to access forever it can be remembered of IP and the DNS but it's essential disadvantages of security which is the best issue to access Network ,IP by the way this problem can decreased feature of achievement.

Generally ,DNS are not designed for DNS software or other software and one of fear is in the Internet as well this time some of companies proceed issue of security that it will be can developed information of DNS and IP.In additional issues are ruined reliability such as 	 DNS cache poisoning, data is distributed to caching resolvers under the pretense of being an authoritative origin server as well as living time DNS is fallen down .limited of security is On DNS can be attacked Non-security( Domain Name System Security Extensions (DNSSEC) also it does not have abilities to support IP and Information and levels of DNS but several tasks is to upgrade security of DNS .To clarify, Domain names are separated by some of dot and between of dot is string domain name the top level of DNS is generic top-level domains for instance .com, org and the string as well domain name are arranged in subordinate levels of the DNS root domain as well as they are included top level and generic level.

On the flip side,Before I mentioned levels in previous paragraph, DNS is created by lots of levels and DNS is accepted string and character and for achievement one DNS that DNS looks for top level for each time and string can be all of characters and DNS does not have problem with Unification name of DNS , in addition DNS might makes wrong name of DNS also it 's chosen the wrong level or DNS, Techniques such as forward-confirmed reverse DNS can also be used to help validate DNS results.