ABSTRACT

The Internet was originally conceived as an open, loosely linked computer network that would facilitate the free exchange of data. Security concept is relatively newer concept to that of TCP/IP suite or Layered Internet Model. But over the years security functionalities in Internet Model have evolved much faster than the model itself. Multiple security functionalities are available at each layer offering redundant services. This paper gives a brief description of all the security issues and available security features at each layer. Also proposes that combining and moving basic data security features to Transport Layer provides efficient end to end security thus to avoid redundancy in security services and to balance trade-off between security and performance. And other necessary network security features can be divided across layers.