IPv6 Address Behavior
* Manually configured link-local addresses do not have a higher priority than automatically generated ones; they coexist and are equally preferred for local communication.
* The other statements are true:
* A. Link-local addresses can use the EUI-64 method for quick generation.
* B. Anycast addresses are only used as destination addresses.
* C. An interface can have multiple global unicast addresses with different prefixes.
HCIP-Datacom-Core Reference
* IPv6 address types and priority behaviors are detailed in the IPv6 addressing sections.

SSL VPN and Its Functionality:
SSL VPN (Secure Sockets Layer Virtual Private Network) provides secure remote access to a network using SSL/TLS protocols.
SSL VPN operates at theApplication Layerof the OSI model. It enables secure communication for applications like web browsers, email clients, and file sharing.
Unlike IPsec VPN, which operates at the Network Layer, SSL VPN focuses on application-specific encryption and authentication.
HCIP-Security Training Material (VPN Basics and SSL VPN Configuration).

The Link State ID in a Type 3 LSA (Summary LSA) indicates the network or subnet being summarized, not the router ID of an ABR. All other statements accurately describe OSPF functionality, making D the false statement .

The silent-interface command disables the sending of OSPF packets, including Hello packets, on the specified interface, which prevents the establishment of OSPF neighbor relationships. However, the interface can still advertise directly connected routes through other interfaces, making Option C incorrect .

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.