MULTIMEDIA AND QUALITY OF SERVICE
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3
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8
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24
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64
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Detailed explanation-1: -How many levels of priority are possible when using class of service (CoS) marking on frames? A Layer 2 frame contains a 3-bit PRI (Priority) field that identifies the class of cervice (CoS) markings. These markings allow a frame to be marked with 8 levels of priority (level 0-7).
Detailed explanation-2: -The QoS fields that you can mark are IP precedence and differentiated services code point (DSCP) in Layer 3. The QoS group is a label local to the system to which you can assign intermediate marking values.
Detailed explanation-3: -Which statement describes the QoS classification and marking tools? Answer: Marking is the adding of a value to a packet header. buffering and forwarding of packets in the order of arrival.
Detailed explanation-4: -DiffServ: Arguably the most commonly used QoS model, DiffServ, works by assigning value to each traffic type. Administrators set a DSCP (differentiated services code point) value ranging from zero to 63 for each traffic type to classify it according to priority and group traffic according to traffic classes (TCs).