Edge Port Behavior
* An edge port transitions directly to the Forwarding state but reverts to participating in RSTP calculations if it receives a valid configuration BPDU. Thus, statement C is false.
HCIP-Datacom-Core Reference
* The behavior of edge ports and their transitions are discussed in the RSTP enhancement sections.

Comprehensive and Detailed Step-by-Step Explanation:
* Route Policy Overview:
* A route-policy is a policy-based routing tool that filters and modifies routing information.
* It consists of one or more nodes, and each node can specify match conditions and apply actions to routes.
* Maximum Number of Nodes:
* The maximum number of nodes supported in a route-policy is 1024, allowing flexibility in route filtering and control.
References:
* HCIA-Datacom Study Guide, Chapter: Route-Policy Configuration
* Huawei Route-Policy Configuration Guidelines

Comprehensive and Detailed In-Depth Explanation:
* Wireless LAN (WLAN) roaming allows mobile devices (STAs) to move seamlessly between different APs without dropping connections.
* Types of WLAN Roaming:
* Layer 2 roaming # STAs move between APs in the same subnet without IP address changes.
* Layer 3 roaming # STAs move across different subnets, requiring IP address reconfiguration (handled via DHCP or tunneling).
* Since roaming prevents service interruption in large WLAN deployments, the statement is true.
# Reference: Huawei HCIA-Datacom Study Guide, WLAN Roaming and Seamless Connectivity.

Comprehensive and Detailed Step-by-Step Explanation:
1. Understanding IGMP Version Compatibility:
IGMP (Internet Group Management Protocol) supports multiple versions, such as IGMPv1, IGMPv2, and IGMPv3.
A device running alater versionof IGMP is backward-compatible and can identify Report messages from earlier versions.
However, a device running anearlier versionof IGMP cannot recognize the newer features or formats of later IGMP versions.
2. Best Practice:
To avoid compatibility issues, the IGMP version configured on the switch should be thesame as or later thanthe version used by the member hosts in the network.
3. Why the Statement is TRUE:
The statement is correct because it describes the compatibility behavior of IGMP versions and advises setting the switch IGMP version appropriately.
Reference:
Huawei HCIA-Datacom Study Guide, Chapter "IGMP Configuration."

The command output indicates that the OSPF neighbor state isFulland that the neighbor relationship has been established. The statement confirms that the negotiation process during the exchange of DD (Database Description) packets has determined the role of the router, with the local device becoming the slave in the Master-Slave relationship, which is critical for LSA synchronization. The other options do not align with the output or OSPF principles