Abstrait

Network Attacks and Their Countermeasures

Ajit Kotkar, Alok Nalawade, Siddhesh Gawas, Aniket Patwardhan

For the first few decades of their existence, computer networks were primarily used by university researchers for sending e-mail and by corporate employees for sharing printers and other resources. Under these conditions, security did not get a lot of attention. But now, as millions of people are using networks for their daily use such as banking, shopping, and filing their tax returns, network security is looming on the horizon as a potentially massive problem. Because all their daily activities are data sensitive means data should not be altered. The requirements of information security within an organisation have undergone two major changes in the last several decades. Before the widespread use of data processing equipment, the security of information felt to be valuable to an organization was provided primarily by physical and administrative means .With the introduction of computer network attacks and their respective countermeasures can help us in securing our data and system from hackers. This paper provides you with brief introduction of attacks on network are various layers and their countermeasures.