In modern computer and telecommunication networks, traffics are transmitted based on packet-mode protocols. Due to the dynamic as well as the complicated properties of networking and the spread of broadband and internet access, one of the major issues is packet loss. Some of the protocols, like Transmission Control Protocol (TCP), can tackle this problem and recover losses, but for Real-time Transport Protocol (RTP), packet delivery cannot be guaranteed, which will significantly affect the Quality of Experience (QoE) for services. Therefore, on the one hand, a preventive solution that can forecast the packet loss is needed to help build an adaptive mechanism and improve the QoE, and on the other hand, studies of packet loss can help to understand the network status, e.g., congestion.