Domain Name System (DNS) The Technology Context – B101
Contents
Domain Name System (DNS)
Important components of DNS and how it works
DNS structure
UK legislation
Limitations
Advantages and Disadvantages
References

Advantages and Disadvantages

The major advantage of DNS is obvious i.e. users do not have to remember the IP addresses, only the domain names. Second advantage of current system is that it is distributed around the world and under control of different bodies (supervised by ICANN) – this results in system being more secure and more reliable.
There are however disadvantages to the Domain Name Server System. IP addresses may change for number of reasons; sometimes actual web host might move to a different data warehouse and has to change the IP address. In this scenario the IP address of the computer is changed but DNS may still have cached the previous IP address and will provide its users with wrong information.