# An Overview of Distributed Firewalls and Controllers Intended for Mobile Cloud Computing
## 3 SDN, NFV, and CASB Technologies
### Security and Performance Enhancements in MCC Through CASB, NFV, and SDN  
MCC represents a paradigm shift in how mobile devices and cloud services interact, offering numerous benefits such as increased computational power, enhanced storage capabilities, and improved service delivery. MCC environments' dynamic and resource-constrained nature necessitates innovative solutions that can effectively manage and protect the intricate interactions between cloud infrastructures and mobile devices, especially regarding security and performance. Three pivotal technologies--CASB, NFV, and SDN--emerge as crucial components in enhancing both the security and performance of MCC. Each brings distinct capabilities and advantages, addressing specific vulnerabilities and performance issues inherent in MCC environments. Table 1 illustrates the role of CASBs in MCC, highlighting their ability to provide threat protection, access control, visibility, and compliance. CASBs are instrumental in mitigating security risks and ensuring efficient data transmission, thereby enhancing overall system performance. CASBs significantly enhance security and performance in MCC. As can be seen in Table 1, CASBs bolster cloud environments by offering visibility, access control, threat protection and compliance. These functionalities are crucial in addressing security concerns related to identity management, access control, privacy, and data security in cloud computing. By preventing data breaches and improving the overall security features, CASBs are particularly beneficial for mobile cloud environments. In terms of performance, as can be seen in Table 1, CASBs contribute to low latency by providing real-time visibility and threat protection, ensuring secure and efficient data transmission. They also enhance throughput by ensuring the integrity and availability of network resources, thereby boosting the overall performance in MCC environments. Additionally, CASBs enhance scalability by facilitating secure and efficient data transmission across expanding network infrastructures. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline \multirow{2}{*}{**Security**} & \multicolumn{3}{c}{**Performance**} \\ \cline{2-4}  & **Low Latency** & **High Throughput** & **Scalability** \\ \hline CASBs strengthen the security posture of cloud environments by offering visibility, threat protection, access control, and compliance [78]. & CASBs enhance low latency with real-time visibility and protection [80; 81]. & CASBs contribute to throughput by providing real-time visibility and threat protection [78]. & CASBs contribute to scalability by providing real-time visibility and threat protection [81; 82]. \\ \hline CASBs play a crucial role in addressing security concerns related to identity management, privacy access control, and data security in cloud computing [79] and compliance [78]. & CASBs contribute to minimizing latency by ensuring secure and efficient data & CASBs ensure secure and efficient data transmission, contributing to minimizing latency and improving overall & CASBs ensure secure and efficient data transmission, supporting scalability by preserving the integrity and availability of network resources [81; 82]. \\ \hline CASBs help prevent data breaches and improve overall security features in cloud computing, making them well suited for mobile cloud environments [78]. & CASBs ensure secure and efficient data and efficient data transmission, contributing to improving scalability by preserving the integrity and availability of network resources [81; 82]. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Enhancing security and performance in MCC through CASB. Consequently, CASBs are essential tools for enhancing the security infrastructure of cloud environments, particularly in scenarios involving distributed firewalls and controllers for MCC. However, deploying CASBs requires meticulous management and configuration due to the complexities inherent in distributed MCC environments.