- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
Voice over Internet protocol (VoIP), which is a communication protocol existing over a network. The IP network can makes it possible for users to make telephone calls using the VoIP technology. Use of VoIP and Internet telephony has increased significantly in the recent years. These new phone services are based on the transmission of voice over packet switched IP networks. VoIP can be realized on any data network that uses IP, like the Internet, Intranets and Local Area Networks (LAN). VoIP customers use their Internet connection to connect to the Internet as well as to make phone calls. VoIP is the real-time transfer of voice signals using the Internet Protocol (IP) over the Internet or a private network. In simpler terms, your voice is converted to digital signal by VoIP that travels over the internet. The key factors that entice enterprises to switch to VoIP are its flexibility and cost efficiency. Some security problems may arise due to the widespread deployment of VoIP. Voice over IP (VoIP) has the potential to provide interactive communication services like video and voice conferencing. VoIP helps to transfer data which are difficult to transfer over circuit-switched wired and wireless networks.
Voice over Internet Protocol (VoIP) is a form of transmission that allows any person to make phone calls over a broadband internet connection. VoIP access usually allows the user to call others who are also receiving calls over the internet. Interconnected VoIP connections also allow users to make and receive calls to and from conventional landline numbers, usually for a service charge. A type of adapter is used in some VoIP services which require a computer and a dedicated VoIP telephone. VoIP can also be described as a distinct solution which enables the transmission of voice signals over internet connection rather than the traditional telephone line.
The foundation block of VoIP is set on two technology - the telephone (PSTN network) and Internet (IP technology). Tremendous works and research on these two fields has made the existence of VoIP possible.
This paper has been a brief study on the protocols used to support VoIP technology, the threats that may occur in a VoIP communication and the security measures taken to avoid these threats. Security for a VoIP system should implement concrete security on the internal network. It should be protected from the threats of hostile networks and any threats to the internal network. The load of the VoIP system should be accommodated by the network and the servers involved. Packet loss, delay jitter and throughput all contribute to degraded voice quality. Additionally, because network congestion can occur at any time in any portion of the network.