H12-821_V1.0 · Question #850
IGMPV1 defines a mechanism for electing queriers when multiple routers exist in a shared network.
The correct answer is B. FALSE. B is correct because IGMPv1 does not define a querier election mechanism. In IGMPv1, the responsibility for selecting the querier is delegated entirely to the underlying multicast routing protocol (such as DVMRP), which designates its elected router to serve as the IGMP querier…
Question
Options
- ATRUE
- BFALSE
How the community answered
(67 responses)- A30% (20)
- B70% (47)
Explanation
B is correct because IGMPv1 does not define a querier election mechanism. In IGMPv1, the responsibility for selecting the querier is delegated entirely to the underlying multicast routing protocol (such as DVMRP), which designates its elected router to serve as the IGMP querier - IGMPv1 itself has no built-in process for this.
Why A is wrong: Querier election was formally introduced in IGMPv2, which added an explicit mechanism where routers compare source IP addresses and the router with the lowest IP address wins the querier role. Attributing this feature to IGMPv1 confuses the two versions.
Memory tip: Think of IGMP versions as a progression of features - v1 = basic (relies on the routing protocol to pick the querier), v2 = smarter (adds its own querier election + leave groups), v3 = richest (adds source filtering). If a question mentions querier election as a built-in IGMP feature, the answer involves v2 or later, never v1.
Topics
Community Discussion
No community discussion yet for this question.