The configuration depicts a standard "router-on-a-stick" model for inter-VLAN routing. Both PCs are correctly configured to use the router's respective sub-interface as their default gateway. When a PC in one VLAN needs to communicate with a PC in another, it sends the traffic to its gateway (the router). The router then performs a routing lookup and forwards the packet to the correct destination VLAN via the appropriate sub-interface. This process relies on standard IP routing and ARP resolution within each VLAN, not Proxy ARP. Proxy ARP is not necessary when end devices have a properly configured default gateway for off-subnet communication.

B. False: The statement is true. Standard inter-VLAN routing does not depend on Proxy ARP, so disabling it will not prevent communication in this correctly configured scenario.

1. Huawei, "HCIA-Datacom V1.0 Training Material," document version C01, Chapter: "VLAN Principles and Configuration," Section: "Inter-VLAN Routing," pp. 28-30. This section details the configuration and data forwarding process for one-armed routing, which does not involve Proxy ARP.

2. Huawei, "HedEx V200R005C00, AR1200 Series Enterprise Routers Configuration Guide - IP Unicast Routing," Section: "ARP Configuration," Subsection: "Configuring Proxy ARP." The documentation explains that Proxy ARP is used to enable communication between hosts on the same network segment but with different network IDs, a scenario different from the one presented.