IPv6 uses segmented extension headers to improve QoS processing efficiency of IPv6 packets.

Question

Options

• ATRUE
• BFALSE
• C
• D

• A
  8% (2)
• B
  85% (22)
• C
  4% (1)
• D
  4% (1)

Explanation

B is correct because the statement contains two inaccuracies: IPv6 extension headers are not "segmented" - they are chained (each header contains a "Next Header" field pointing to the following one), and their primary purpose is not QoS. QoS in IPv6 is handled by the Traffic Class and Flow Label fields in the fixed base header, not by extension headers. Extension headers are used for things like routing, fragmentation, authentication (AH), and encapsulating security payloads (ESP); they improve routing efficiency by allowing intermediate routers to skip optional processing, but this is distinct from QoS.

A (TRUE) is wrong because both claims in the statement are false - neither the "segmented" descriptor nor the "QoS" purpose accurately describes IPv6 extension headers.

Memory tip: Think of IPv6 extension headers as a linked chain, not segments - each one points to the next. For QoS, remember the initials TF (Traffic class + Flow label) live in the base header and handle QoS directly, keeping routers fast.

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