Abstract: This study proposed a method for synthesizing a virtual laboratory for evaluation of congestion control algorithms in TCP/IP networks (CCVL). In CCVL (i.e., congestion control virtual laboratory), the required hardware and the risk of hardware malfunctioning is noticeably reduced. The result is a low-cost compact portable virtual laboratory which also has the capability of connecting to the real internet and interchanging and gathering test data with/from it, if applicable. This method can be greatly useful in congestion control laboratories at universities and research institutes.