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Huawei H12-811_V2.0 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Ethernet Technology Basics: Covers Ethernet standards, switching principles, VLANs, and Layer 2 protocols used in enterprise network environments.
Topic 2
  • Typical Campus Networking Solution: Covers end-to-end campus network design scenarios, integrating switching, routing, security, and wireless technologies into a unified solution.
Topic 3
  • Data Center Network Basics: Covers the architecture and key technologies used in modern data center networks including virtualization and high-availability design concepts.
Topic 4
  • Data Communication Network Basics: Covers foundational concepts of data communication networks including network types, reference models (OSI
  • TCP-IP), and basic device roles.
Topic 5
  • Network Security and Services: Covers essential network security mechanisms including ACLs, AAA, NAT, and basic firewall concepts to protect network infrastructure.
Topic 6
  • WLAN Technology Basics: Covers wireless LAN standards, components such as APs and ACs, WLAN architecture, and basic configuration principles.
Topic 7
  • IP Technology Basics: Covers IPv4
  • IPv6 addressing, subnetting, routing fundamentals, and common routing protocols such as OSPF, RIP, and static routing.

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Huawei HCIA-Datacom V2.0 Sample Questions (Q86-Q91):

NEW QUESTION # 86
On an intelligent computing data center network, the lossless network technology _____ is deployed to instruct the sender to stop sending packets when network congestion is about to occur, ensuring zero packet loss on the network. (Enter the acronym in uppercase.)

Answer:

Explanation:
PFC
Explanation:
The acronym in the source file is mistyped as PCF. The correct intelligent lossless Ethernet technology is PFC, which stands for Priority-based Flow Control. PFC extends Ethernet flow control by applying pause behavior to selected traffic priorities rather than stopping all traffic on an interface. When a downstream device detects that a lossless priority queue is approaching congestion, it can send a priority-specific pause indication to the upstream sender. The upstream device temporarily stops transmitting traffic for that priority, preventing the downstream buffer from overflowing and thereby supporting zero-packet-loss behavior for the protected traffic class. This capability is important in intelligent computing and data center fabrics carrying storage or high-performance computing workloads that are sensitive to packet loss. Huawei describes PFC as a foundational technology for intelligent lossless networks, often used together with congestion-management mechanisms such as ECN and related optimization features. Therefore, the blank must be filled with PFC in uppercase. The original answer PCF should be corrected to PFC.


NEW QUESTION # 87
Private addresses are network or host addresses that are constrained for use within internal networks and cannot be used for Internet access directly. Which of the following IP addresses is not a private IP address?

Answer: B

Explanation:
Private IPv4 address ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The address
172.32.32.32 falls outside the private 172.16.0.0-172.31.255.255 range, so it is a public IP address and not a private one.


NEW QUESTION # 88
An enterprise has a small amount of wireless user traffic, and all user gateways are located on the core switch.
To ensure WLAN security, the customer wants to manage wireless user traffic uniformly on the WAC and requires that the WAC does not carry any wired user traffic. Which of the following WLAN networking methods can the customer choose?

Answer: B

Explanation:
The customer requires centralized processing of wireless traffic without forwarding ordinary wired traffic through the WAC.
According to the HCIA-Datacom WLAN architecture material, off-path networking allows the WAC to connect to the existing network without operating as an aggregation switch for wired user traffic.
Layer 3 off-path networking allows the WAC and Fit APs to communicate across different IP subnets.
Tunnel forwarding encapsulates wireless user traffic into CAPWAP data tunnels and sends it to the WAC for centralized forwarding and security policy enforcement.
Direct forwarding would allow wireless traffic to bypass the WAC, failing the requirement for centralized wireless traffic management.
In-path networking could place the WAC in the forwarding path of wired services, which is not desired.
Therefore, off-path Layer 3 networking with tunnel forwarding satisfies the stated requirements.


NEW QUESTION # 89
Each host has its own network interface card (NIC). Each NIC is assigned a globally unique MAC address during manufacturing. Which of the following is a valid MAC address for a host's NIC?

Answer: D

Explanation:
A valid unicast MAC address must be globally unique and must not be a multicast or broadcast address. The least significant bit of the first octet determines unicast or multicast; in this case, the address starting with 02 indicates a locally administered address (still valid for a NIC). Other options include multicast (01, FF) or broadcast (FF-FF-FF-FF-FF-FF), which are not valid individual host MAC addresses.


NEW QUESTION # 90
An enterprise has deployed a Huawei WLAN, but some STAs cannot associate with wireless signals. To troubleshoot this issue, you log in to the WAC and run related commands. The command output is as follows. According to the command output, which of the following is the possible cause of the STA association failure?

Answer: A

Explanation:
If you look closely at the column CU (Channel Utilization) for both radios of AP ID 0:
Radio 0 (2.4G band): The CU is at 90%.
Radio 1 (5G band): The CU is at 13%.
A channel utilization of 90% on the 2.4G radio indicates severe congestion and heavy wireless interference. When the air interface is that busy, stations (STAs) attempting to connect will suffer from massive packet loss, timeouts, and a general inability to complete the association handshake.


NEW QUESTION # 91
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