MULTIMEDIA AND QUALITY OF SERVICE
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The type of service
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Traffic Class
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Priority
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VLan ID
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Detailed explanation-1: -What two fields are available in IPv4 and IPv6 headers to mark packets for QoS? Explanation: IPv4 uses an 8-bit Type of Service field to mark packets at Layer 3 and IPv6 uses an 8-bit Traffic Class field to mark packets at Layer 3.
Detailed explanation-2: -Flow label field in IPv6 packet header provides an efficient way for packet marking, flow identification, and flow state lookup, but how to use this field in a specific architecture to provide QoS support is still an open issue [6].
Detailed explanation-3: -Some fields have changes in name, but they are the same function for both protocols, these fields are: Type of Service (IPv4) and Traffic class (IPv6) . Time to Live (IPv4) and Hop Limit (IPv6). Protocol (IPv4) and Next Header (IPv6). Total Length (IPv4) and payload (IPv6).
Detailed explanation-4: -QoS features supported for IPv6 environments include packet classification, queueing, traffic shaping, weighted random early detection (WRED), class-based packet marking, and policing of IPv6 packets. These features are available at both the process switching and Cisco Express Forwarding switching paths of IPv6.