MULTIMEDIA AND QUALITY OF SERVICE
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Intserv
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FIFO
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best-effort
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DiffServ
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Detailed explanation-1: -Which QoS model uses the DSCP bits to mark packets and provides 64 possible classes of service? Explanation: The DiffServ model uses 6-bits known as the DiffServ Code Point (DSCP) bits to mark traffic and offers a maximum of 64 possible classes of service.
Detailed explanation-2: -There are three models for implementing QoS. QoS is implemented in a network using either IntServ or DiffServ. IntServ provides the highest guarantee of QoS, it is very resource-intensive, and therefore, not easily scalable. DiffServ is less resource-intensive and more scalable.
Detailed explanation-3: -DSCP Value. DiffServ Code Point (DSCP) uses the 6 bits, thereby giving 2^6 = 64 different values (0 to 63). describes the standard DSCP values. Remaining DSCP values can be customized as per the QoS requirement.
Detailed explanation-4: -Which model is the only QoS model with no mechanism to classify packets? The best-effort model has no mechanism to classify packets and treats all networks packets equally.