What does Call Admission Control require the client to send in order to reserve the bandwidth?
What does Call Admission Control require the client to send in order to reserve the bandwidth?
Call Admission Control (CAC) is a mechanism that ensures quality of service (QoS) for real-time applications like voice and video by managing the allocation of network resources, particularly bandwidth. To reserve the necessary bandwidth, the client needs to send a traffic specification (TSPEC). This specification provides detailed information about the call requirements such as the average size of packets, volume of traffic in both directions, and the minimum data rate needed.
If your phone supports CAC (this is the case with a 7925), before any call (as you punch the numbers and press the green button), the phone is going to send to the AP and Add Traffic Tream (ADDTS) request. The request contains a Traffic Classification (TCLAS) field, that basically says that this is voice 2 ways. It also contains a field called traffic specification (TSPEC) that provides all the details you need for the call: average size of packets, volume of traffic on the way up (per second), on the way down, minimum data rate needed, etc. This is what allows the AP to determine if this call can be adminteed
Right answer D. Call Admission Control (CAC) is a mechanism used in networking to manage the allocation of network resources, particularly bandwidth, to ensure that quality of service (QoS) requirements are met for real-time applications such as voice and video.
D is correct