If the wide area network (WAN) is supporting converged applications like Voice over Internet Protocol (VoIP), which of the following becomes even MORE essential to the assurance of network?
Correct Answer: B
If the wide area network (WAN) is supporting converged applications like Voice over Internet Protocol (VoIP), deterministic routing becomes even more essential to the assurance of network. WAN is a network that spans a large geographic area, such as a country or a continent, and connects multiple local area networks (LANs) or other networks. WAN is used to transmit data, voice, or video over long distances, using various technologies, such as leased lines, packet switching, or circuit switching. VoIP is a technology that enables the delivery of voice communications over IP networks, such as the internet or WANs. VoIP converts the analog voice signals into digital packets, and transmits them over the IP networks, using various protocols, such as Session Initiation Protocol (SIP) or Real-time Transport Protocol (RTP). Deterministic routing is a routing technique that ensures that the packets are always sent along the same path or route between the source and destination devices. Deterministic routing can provide the following benefits for the WAN that supports VoIP:
* It can improve the quality and reliability of the voice communications, as the packets are always delivered in the same order and with the same delay, avoiding issues such as packet loss, jitter, or latency.
* It can enhance the security and privacy of the voice communications, as the packets are always routed through the same trusted and secure devices, avoiding the exposure or interception by unauthorized or malicious devices.
* It can simplify the management and troubleshooting of the network, as the network administrators can easily monitor and control the network traffic and performance, and identify and resolve any problems or errors. References: CISSP All-in-One Exam Guide, Chapter 4: Communication and Network Security, Section: Wide Area Networks, pp. 191-192.