User:Paarth/3 drawbacks of dns

Computer understands numbers and humans are not so good with them. So, if you wants to reach a webpage, the DNS helps to convert the letters to the IP address of the Webpage. But the system has some disadvantages which are summarized below:

The DNS contacts the DNS server for the Ip address and so that it may route the user to the concern webpage and the DNS Server also do not know the IP address then it will reply with some other server's who has to be contacted for the same. Due to this, Longer latancy in intiating the web request may take place

The DNS server mantains the cache record of the ip address and Whenever a DNS server does not have the answer to a query within its cache, the DNS server can pass the query onto another DNS server on behalf of the client. If the server passes the query onto another DNS server that has incorrect information, whether placed there intentionally or unintentionally, then cache poising can occur. Cache poising principle can be used by the hackers for the denial of service and Masquerading.

DNS did not have the necessary security features so, Domain Name System Security Extensions (DNSSEC) were introduced to authenticate DNS data.