The following is part of the output information of the router RTD. display igmp-snooping IGMP Snooping Information for VLAN 3 IGMP Snooping is Enabled IGMP IP Version is Set to default 2 IGMP Query…

Question

Options

• AThe version of the IGMP message that can be processed in VLAN3 is the default value
• BThe IGMP snooping-enabled device sends unsolicited multicast group membership information on the VLAN
• CThe maximum response time of IGMP in VLAN3 is the default value, which is 60 seconds
• DIGMP Snooping of VLAN3 is enabled

• B
  11% (2)
• C
  83% (15)
• D
  6% (1)

Explanation

Option C is wrong because it confuses two different IGMP timers: the Max Response Interval (shown as 10 seconds in the output) and the Query Interval (which is 60 seconds). The statement correctly identifies it as a default value but assigns the wrong number - 60s is the Query Interval, not the Max Response Interval.

Why the distractors are correct descriptions (not wrong):

• A is accurate - the output explicitly states "IGMP IP Version is Set to default 2," confirming VLAN3 processes IGMPv2 by default.
• B is accurate - with IGMP Snooping enabled, hosts send unsolicited IGMP membership reports (joins) when they want to subscribe to a multicast group, without waiting for a query.
• D is accurate - the output plainly states "IGMP Snooping is Enabled" for VLAN3.

Memory tip: Think of IGMP timers as a "question-and-answer" pattern: the Query Interval (60s) is how often the router asks "who wants multicast?", and the Max Response Time (10s) is how long hosts have to reply. The response window is always shorter than the query interval - if you remember 60s and 10s, never assign them to each other.

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