How many traffic classes does IPv6's Traffic Class field support for QoS?

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Multiple Choice

How many traffic classes does IPv6's Traffic Class field support for QoS?

Explanation:
IPv6’s Traffic Class field is 8 bits wide, which means it can carry 2^8, or 256, distinct values. These values are used to indicate how packets should be treated for quality of service. In practice, QoS is often implemented by using the top 6 bits as the Differentiated Services Code Point (DSCP), giving 64 DSCP codepoints, while the bottom 2 bits carry ECN flags. But the field itself enables 256 possible patterns, so the number of traffic classes it supports is 256.

IPv6’s Traffic Class field is 8 bits wide, which means it can carry 2^8, or 256, distinct values. These values are used to indicate how packets should be treated for quality of service. In practice, QoS is often implemented by using the top 6 bits as the Differentiated Services Code Point (DSCP), giving 64 DSCP codepoints, while the bottom 2 bits carry ECN flags. But the field itself enables 256 possible patterns, so the number of traffic classes it supports is 256.

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