Which feature can you implement to reserve bandwidth for VoIP calls across the call path?
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A. B. C. D.D
RSVP is a protocol used to reserve network resources, such as bandwidth, along a path between a source and destination in a network. By using RSVP, it is possible to reserve bandwidth end-to-end across a network for specific types of traffic, such as VoIP calls. RSVP can be used to reserve bandwidth in both wired and wireless networks.
PQ (Priority Queuing) is a queuing method that assigns high priority to certain types of traffic, such as VoIP, and sends them first. This does not necessarily reserve bandwidth for VoIP calls across the call path.
CBWFQ (Class-Based Weighted Fair Queuing) is a queuing method that divides traffic into classes based on its characteristics and assigns each class a specific amount of bandwidth. While CBWFQ can be used to prioritize VoIP traffic, it does not necessarily reserve bandwidth for VoIP calls across the call path.
Round-robin is a queuing method that sends traffic in a cyclical order. It does not reserve bandwidth for VoIP calls across the call path.
Therefore, the correct answer is D. RSVP.