Which two approaches are taken to implement CAC within Cisco UCM in full-mesh topology? (Choose two.)
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A. B. C. D. E.CE.
Call Admission Control (CAC) is a mechanism in Cisco Unified Communications Manager (UCM) that helps to prevent overloading of the network and ensuring voice quality by managing and controlling the number of calls that can traverse a particular network link.
When it comes to implementing CAC within Cisco UCM in a full-mesh topology, there are several approaches that can be taken. Two of the most common approaches are:
Location-Based CAC: Location-Based CAC uses the physical location of the devices to determine how much bandwidth is needed for voice and video calls. In this approach, UCM administrator defines different locations within the network, and each location is assigned a bandwidth value. When a call is initiated, UCM checks if the required bandwidth is available for the call by comparing the location's bandwidth value with the available bandwidth on the network link. If there is enough bandwidth available, the call is allowed to pass through. If not, the call is blocked, and the user receives a busy tone. This approach ensures that calls do not overload network links and guarantees good voice quality.
RSVP-Enabled Locations: RSVP (Resource Reservation Protocol) is a protocol used to reserve bandwidth for real-time traffic, such as voice and video calls. RSVP-enabled locations are a type of location-based CAC that use RSVP to reserve bandwidth for voice and video calls. In this approach, each location is configured with a specific amount of bandwidth reserved for voice and video calls. When a call is initiated, UCM sends an RSVP reservation request to the network devices along the path of the call. The network devices reserve the required amount of bandwidth, and the call is allowed to pass through. This approach guarantees that the required bandwidth is available for the call, which ensures good voice quality.
Therefore, the correct options are C. location-based CAC, and D. RSVP-enabled locations. Both of these approaches utilize location-based configuration, but with different mechanisms of bandwidth allocation and management.