International Journal of Emerging Technology and Advanced Engineering (IJETAE)
Cloud computing is the service delivered through the network or internet by using a computer resources. Telecommunication companies initially started offering point to point data circuits but later in 1990, it started providing virtual private networks. The VPN is the technology for connecting computers to the remote isolated unaccesable computer network using internet or any other network. The advantages of VPN are comparable QOS and low cost. It also provides security and their connections are isolated in the network .The types of cloud computing are: public, private and hybrid clouds. Public cloud services provides services to the public using application and storage.