In order to validate the effectiveness of a network design, its performance needs to be evaluated. In general, there are three approaches to evaluate the network performance, including benchmarking, simulation, and analytical modeling. In this chapter, the author will sequentially discuss these three approaches along with their merits and demerits as well as their applications. Section 7.1 will first present the benchmarking technique, followed by the introduction of simulation and analytical modeling approaches in Sections 7.2 and 7.3, respectively. Also, in this chapter, a typical system and its component will be provided in Section 7.4 as illustrations of different performance-evaluation techniques.