VoIP uses which of the following because network congestion can be s.pdf

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VoIP uses which of the following because network congestion can be such a critical problem? A. Time-division multiplexing B. TCP protocol C. VLANs technology D. Isochronous design Solution D. VoIP is very time sensitive and, as such, should be based on an isochronous design. This means that the entire system must be engineered to deliver output with exactly the same timing as the input. FireWire is another example of a device that contains an isochronous interface. Answer A is incorrect because VoIP does not use time-division multiplexing. Answer B is incorrect because VoIP uses UDP for the voice portion of the call, not TCP. Some implementations of VoIP can use TCP for setup and call control. Answer C is incorrect because VLANs are not used for timing and delay problems, but are used to separate the VoIP from general traffic to make it more secure from sniffing..

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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.

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Internet Telephony, often denoted as Voice-over-Internet-Protocol (VoIP), has gained more and more attention world-wide during the last decades. Voice over Internet Protocol (VoIP) technology has become a communication alternative with the continuous increasing of Internet bandwidth and rapid advancement of peer-to-peer (P2P) applications.In this paper three types of VOIP are explained: (i) PC to PC : this is the easiest way to use VOIP, which enables you to talk and communicate Voice over Internet with all people over the world. (ii) PC to Phone: which need a gateway that connects IP Network to phone Network. Its uses a device called an ATA (Analogue Telephone Adaptor).The ATA allows you to connect a standard phone to your computer or your Internet connection for use with VOIP. The ATA is an analogue to digital converter. (iii) Phone to Phone: Where you need more gateways that connect IP network to phone networks, more phone networks that connect Telephone set to gateway, and IP network that connect gateway to gateway. This paper also explains Internet Protocol (IP) that VOIP uses to transmit voice as packets over an IP network as follows: H.323 Protocols that provides the technical requirements for voice communication over LANs, while assuming that Quality of Service isn't provided by LANs. Session Initiation Protocol (SIP) standard which is the standard for establishing VOIP connections. This paper also explores Voice XML which is a markup language derived from XML for writing telephone-based speech applications.In this paper also VoiceXML developed environments(Gateways) are explained, where a list of all VoiceXML developers is included, and the most popular VoiceXML development environments (Gateways) are explained in details.Finally, in this paper ten VoiceXML applications are developed

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