This statement isfalsebecauseIGMPv2 improves upon IGMPv1 by introducing the Leave Group message.
InIGMPv1, members leave silently, and the router waits for the timeout.
InIGMPv2, a host sends aLeave Groupmessage, prompting the router to send aGroup-Specific Queryto determine if other members are still present. If no responses are received, the group is pruned before timeout.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"IGMPv2 allows group members to actively send Leave messages, reducing unnecessary forwarding delays.
This improves efficiency over IGMPv1."
(Chapter: Multicast Protocols - Section: IGMP Versions)

Goal Analysis:
Requirement:
The route to192.168.3.0/24must exist in R1's and R3's routing tables.
The route mustnot exist in R2's routing table.
This requires filtering to ensure the route is either:
Blocked on R2's routing table (via filtering on R2), or
Blocked before it is advertised to R2.
Analysis of Each Option:
Option A (Filter-policy on R2 for filtering received routes):
Applying a filter-policy on R2 to filter received routes will block the route from entering R2's routing table but still allow it to propagate to R3.
This meets the requirement.
Option B (Filter-policy on R2 for filtering the routes to be advertised):
Blocking the advertisement of routes from R2 to other routers does not affect the routes received by R2 itself.
This does not meet the requirement but does not affect the propagation to R3.
This is valid if the received route is blocked.
Option C (Filter-policy on R1 for filtering the routes to be imported):
If the route is filtered on R1 during the import phase, the route will not exist in R1's routing table and thus cannot be advertised to either R2 or R3.
This fails to meet the requirement because the route must exist in R1's and R3's routing tables.
Option D (Filter-policy on R1 for filtering the imported routes to be advertised):
Filtering routes on R1 before advertising to R2 will prevent R2 from receiving the route but allow R1 to advertise the route to R3.
This meets the requirement.
Correct Option:
C (Filter-policy on R1 for filtering the routes to be imported):This will prevent the route from existing in both R1 and R3, violating the stated requirement.
References:
HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering
Huawei OSPF Configuration and Filtering Methods

The asbr-summary command is executed in the global OSPF view to summarize external routes. The abr- summary command is executed in the OSPF area view to summarize routes between areas. By default, the advertise parameter is enabled unless explicitly overridden by the not-advertise option .

GRE Characteristics
* GRE does not inherently support encryption or authentication. It is a tunneling protocol for encapsulating packets, and data security features must be implemented using other protocols such as IPsec.
* Other correct attributes of GRE include:
* B. Supports multicast transmission.
* C. Acts as a Layer 3 VPN encapsulation technology.
* D. Can work with VPN protocols like IPsec for better security.
HCIP-Datacom-Core Reference
* GRE features and limitations are discussed in VPN encapsulation technology chapters.