H12-811_V1.0 Exam Dumps - Huawei HCIA-Datacom Questions and Answers

Understanding ARP Entries:

Each ARP entry associates a MAC address with an IP address dynamically or statically.

In the table, the MAC address 00e0-fc99-9999 is linked to multiple IP addresses across different interfaces.

Dynamic MAC Address Assignment:

As the host changes its IP address, the MAC address remains consistent.

Conclusion:

The statement is TRUE because the MAC address 00e0-fc99-9999 appears with three different IP addresses dynamically.

Comprehensive Explanation: It is possible for the load balancing modes at both ends of an Eth-Trunk (Ethernet Trunk) to be different, as long as the devices at both ends support the different modes. Load balancing modes control how traffic is distributed across multiple links in the trunk. Although the modes may differ, they must be compatible in terms of ensuring that traffic is appropriately handled across the multiple physical interfaces bundled in the trunk.

The default route preference on Huawei VRP places Direct routes at the highest priority, followed by Static routes, then RIP, and finally OSPF. Direct routes are most trusted as they represent directly connected networks, while OSPF, being a dynamic protocol with more administrative distance, is prioritized lower by default​.

Comprehensive and Detailed Explanation:

In PPP (Point-to-Point Protocol) connections, a static route can be configured using:

Next-hop IP address

Outbound interface

Since PPP links are point-to-point, the router can directly forward packets without needing an explicit next-hop address.

Example configurations:

ip route-static 10.1.1.0 24 Serial0/0/0

ip route-static 10.1.1.0 24 192.168.1.2

✅ Reference: HCIA-Datacom Routing Guide – Static Route Configuration on PPP

Comprehensive Explanation: To prevent unauthorized changes to the router ' s configuration, the administrator can take several steps. Configuring an ACL to restrict management access ensures that only authorized users, such as the administrator, can log in to the router. Additionally, using AAA (Authentication, Authorization, and Accounting) allows the administrator to manage user permissions and control access to the router ' s functions based on user roles. Port-security is used for limiting MAC addresses on switch ports, and login privilege levels should be set appropriately but not limited to level 0, which restricts almost all actions.

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​.

Detailed Explanation:MAC addresses that start with the first octet having the least significant bit (LSB) of the first byte set to 1 (such as 01-02-03-04-05-06) are multicast MAC addresses, and these cannot be assigned to a host ' s network interface card (NIC). Only unicast MAC addresses can be assigned to hosts​.

Statement A (False): Any router can function as an ASBR, not just ABRs. An ASBR is any router that connects OSPF to an external network, regardless of area.

Statement B (True): Area 0 is the OSPF backbone area, and all other areas must connect to it.

Statement C (True): Area partitioning reduces LSDB size by limiting the scope of LSAs within an area.

Statement D (True): Routers in the same area have the same LSDB, ensuring consistency in link-state information.

Thus, the correct answer is A (False statement).