(NQA (networkqualityananalyzer) network quality analysis is a real-time network performance detection and statistics technology, which can count the response time, network jitter, packet loss rate and other network information. NQA also provides the function of linkage with track and Application module to monitor the changes of network status in real time. NQA analyzes the network performance or quality of service by sending test messages, and provides users with network performance parameters, such as delay jitter, total HTTP delay, delay in obtaining IP address through DHCP, TCP connection delay, FTP connection delay, file transfer rate, etc.)