This document reviews the implementation model architecture of Software Defined Networks (SDN) using Raspberry Pi, highlighting the advantages of SDN over traditional networking by separating control and forwarding layers for improved management. The use of Raspberry Pi as a single board computer shows effective QOS results per ITU-T G.1010, indicating its capability for network management. The research discusses different protocols like OpenFlow and routing technologies such as OSPF, showcasing SDN's flexibility and potential cost benefits for network infrastructure.