H12-811_V1.0 Exam Dumps - HCIA-Datacom V1.0 Exam

The command defines a static route to the network 10.0.12.0 with a 255.255.255.0 subnet mask, using 192.168.1.1 as the next-hop address. Static routes are manually set routes with fixed paths, and by default, they have higher priority than dynamic routes, but the specific preference value depends on configuration. This setup enables targeted routing for traffic towards the specified destination​.

Detailed Explanation:When bridge priorities are identical, STP elects the switch with the lowest MAC address as the root. Here, Switch B has the lowest MAC address (00-e0-fc-00-00-10), making it the root switch. (Reference: HCIA-Datacom Training Material, STP Root Bridge Election)

Detailed Explanation:In this scenario, the MAC address 00e0-fc99-9999 is associated with multiple IP addresses through dynamic ARP learning, indicating that the host’s IP has changed several times. The ARP table on the switch shows multiple entries with different IPs mapped to the same MAC address, which is common when a device frequently updates its IP. As ARP is a dynamic protocol, these entries reflect the device's current and past IP associations. (Reference: HCIA-Datacom Training Material, ARP Operation and IP-MAC Mapping)

For link aggregation (such as LACP) to function properly, the physical interface rates and duplex modes on each end of the aggregated link must match. This alignment ensures smooth data transfer across the aggregated link, as mismatched settings would lead to connectivity issues or performance degradation​.

In Huawei’s VRP system, the login timeout setting is applied specifically to Virtual Terminal (VTY) interfaces, which manage remote access connections such as Telnet or SSH. Configuring a login timeout on a VTY interface helps secure remote sessions by automatically disconnecting inactive users after a specified period​.

Detailed Explanation:RSTP (Rapid Spanning Tree Protocol) employs a synchronization mechanism with the proposal/agreement handshakes to prevent loops during topology changes. By synchronizing states between switches, RSTP avoids temporary loops while quickly transitioning ports to the forwarding state. (Reference: HCIA-Datacom Training Material, RSTP Mechanisms and Synchronization)

If host A already has host B’s MAC address in its ARP cache, it can send packets directly to host B without needing to perform an ARP request. This cached information allows immediate packet delivery, assuming no network changes have occurred that would invalidate the ARP entry​.