User:Rahul~enwikiversity/3 drawbacks of dns

Drawbacks of DNS
Dns has several advantages but has some limitations also. First is its limited ASCII character set that of the DNS addresses. Because of this it is not possible to use unusual characters in the domain names. Now a days ICANN made it feasible to simulate the chars that cannot be used in domain name using Punycoding scheme, that converts an entered string into a restricted character set understandable by DNS server.

Another significant drawback of DNS is that it is vulnerable to attacks like DNS cache poisoning, DNS spoofing, DNS ID hacking and DNS server attacks these all attacks are meant to mislead the client and this attacks can be mitigate also such as Cache poisoning and client flooding attacks are mitigated with the addition of data origin authentication for RRSets as signatures are computed on the RRSets to provide proof of authenticity.