% state of the art

This chapter describes the state of art of new technologies as \textit{SDN} and \textit{NFV} which are used to design and to develop this thesis. Moreover the concept of a policy will be introduced within the conflicts analysis.

\section{Software Defined Networking and Network Function Virtualization}
\subsection{Software Defined Networking (SDN)}\label{subsec:SDN}
\input{latex_files/state_of_art/sdn.tex}
\subsection{Network Function Virtualization - (NFV)}\label{subsec:NFV}
\input{latex_files/state_of_art/nfv.tex}

\section{Network Security Function and Interface to NSF}
\subsection{Network Security Function}
\input{latex_files/state_of_art/nsf.tex}
\subsection{Interface to NSF (I2NSF)}
\input{latex_files/state_of_art/i2nsf.tex}

\section{Network Security Policies}\label{sec:NSP}
\subsection{Network Security Policies (NSP)}
\input{latex_files/background/NSP.tex}
\subsection{Policy Analysis, Conflicts and Transformation}\label{subsec:policy_analysis}
\input{latex_files/background/policy_analisy_conflicts_transformation.tex}