: availability, performance, integrity, and security. The flexibility in the programmability of control plane has both acted as a bane as well as a boon to SDN. Like the ARP poisoning in the legacy networks, there are several other vulnerabilities in the SDN architecture as well. INTRODUCTION SDN provide user a functionality to program the network in easier manner and also creating dynamic flow policies. Distributed Denial of Service (DDoS) attack is one of the major factor which can cause the network as unreachable (Mohammad & Marc, 2015). By the means of spoofing which can cause the destination packet DOI: 10.4018/978-1-5225-3640-6.ch010 Copyright © 2018, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Analysis of Issues in SDN Security and Solutions unreachable as the source address will become unreachable in this case. Multiple types of attacks within the SDN networks can be categorized as: Exploiting timers CPU memory drainage Reduction in computing power Congestion within the network resources Poisoning of the domain name translation There can be multiple areas where the attacks can be done within the SDN network, such as hindering of the normal functioning of the service by attacking at the application layer. The attacks can also damage web browser, email application or media player. This type of disfunctioning can be caused by disruption of specific application and are termed as application level denial of service. There can be permanent damage to the system which will completely destroy the hardware of the system through malicious attack which is termed as permanent denial of service or plashing. The permanent damage can be caused by attack on firmware which are the inbuilt code or program inside a system whichruns the system (Lau, Rubin., Smith, et al., 2000). The permanent attack will change the firmware which is not acceptable by the hardware a