Soni Madhulatha .T

A flexible technique for index selection is introduced, which can be tuned to achieve different levels of constraints and analysis complexity. Index creation is quite time consuming. It is not feasible to perform real-time analysis of incoming queries and generate new indexes when the patterns change. Potential indexes could be generated prior to receiving new queries and, when indicated by the online analysis, moved to the active status.

A database is a collection of records or data that is stored in a computer system. For a database to be functional, it must not only store large amounts of records well, but be accessed easily. Moreover new information and changes should also be fairly easy to input. In order to have a highly efficient database system, you need to incorporate a program that manages the queries and information stored on the system

A virtual private network (VPN) is a network used in public telecommunication infrastructure, to provide remote offices or individual users with secure access to their organization's network, through security procedures and tunneling protocols.

Spam is getting bigger but the real coming threat is viruses on the phones. This is going to be devastating and the problem is that the world is unaware. Most phones are not protected because nothing on a major scale has happened before, so no-one is paying attention to that. With mobile phones becoming increasingly sophisticated, and with more than half of the world's population predicted to own a unit by the end of 2008, it is inevitable that mobile devices are facing an increasing threat.

The increase of the internet and intranet usage has introduced complications and hindrance of normal performance. The increase in the data sent to networks has resulted in congestion. The worldwide network of computer networks known as the Internet handles an enormous amount of traffic every day. At any given moment thousands of users are sending messages or browsing millions of pages of the World Wide Web. The current Internet features traffic from diverse applications; ranging from delay-sen