Date Added: Nov 2012
Due to the rapid expansion of the technology field. Developing the Internet has become more urgent to meet the needs of the expansion. TCP/IP is the most protocol used in the Internet. It consists from layers, each layer done its job separately. However these layers susceptible to different attacks and data link layer one of the most layers targeted by attacker, attack at lower layer may lead to more sophisticated attacks to upper layers like Man in The Middle (MiTM), DNS spoofing and Denial of Service (DoS). Even with encrypted protocols such as HTTPS and SSL. In this paper the authors discuss security at the Data Link Layer and the attacks depend on the Address Resolution Protocol (ARP).