Huawei'sAR routersoffer flexible configurations for fixed ports and modular cards, enabling them to adapt to various networking scenarios. Key points include:
* LAN-to-WAN switching:LAN ports can be converted to WAN ports using theundo portswitchcommand, allowing greater flexibility in network design.
* WAN-to-LAN switching:Some AR router models support converting WAN ports to LAN ports, depending on the hardware and software capabilities.
* Layer 2 card limitations:Layer 2 cards configured with VLANIF interfaces can perform basic Layer 3 forwarding but lack advanced features like NAT, MPLS, IPsec, and HQoS.
The claim thatall Layer 2 cards support LAN/WAN switchingis incorrect. Only specific models and configurations support this functionality, making option D false.
References:
* HCSA-Presales-IP Network Study Guide, Section: "AR Router Port and Card Configurations."
* Huawei AR Router Product Documentation, Port Switching and Layer 2 Card Features.