Free Practice Questions for Huawei H13-511_V5.5 Exam

In the Huawei HCIA-Cloud Computing curriculum, specifically under the "Network Technology Basics" module, Open vSwitch (OVS) is introduced as a key component of software-defined networking (SDN). The primary technology used by OVS for remote access to its control plane and for the programmatic control of traffic flows is OpenFlow.5 OpenFlow is a standard communications protocol that allows an SDN controller (the "brain" of the network) to interact with the forwarding plane (the switch) of a network device.

OpenFlow enables "traffic control" by allowing the controller to define specificflow rules.6These rules tell the switch exactly how to handle packets based on various criteria such as source MAC, destination IP, or TCP port. Instead of the switch making local, autonomous decisions (as a traditional switch does), OVS uses OpenFlow to receive instructions from a centralized management layer. This is how Huawei’s cloud infrastructure achieves "remote access" for network orchestration; an administrator can change the network behavior of thousands of virtual machines across multiple physical hosts by pushing new OpenFlow tables from a central controller.

WhileOVSDB(Option B) is also a critical protocol for OVS, its primary role is to manage theconfigurationof the switch (such as creating bridges, adding ports, or setting up tunnels), rather than the "traffic control" or "flow steering" handled by OpenFlow.BFD(Option C) is used for link failure detection, andNQA(Option D) is a Huawei-specific tool for measuring network performance. In the context of the HCIA exam, OpenFlow is the correct answer for the protocol that enables the intelligent, remote management of data paths in a virtualized network environment.

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In the official Huawei HCIA-Cloud Computing curriculum, specifically within the "Huawei Virtualization Platform Management" module, the lifecycle and resource adjustment of Virtual Machines (VMs) are covered in detail. While virtualization provides significant elasticity, certain physical-to-logical mappings have technical constraints. According to the training materials, while you can add disks or increase the capacity of an existing virtual disk (expansion), disk capacity cannot be reduced once it has been allocated and formatted by the Guest Operating System.

The reason for this limitation is rooted in data integrity. Reducing a disk's size at the virtualization layer (CNA/VIMS) would involve "chopping off" the end of the logical block range. Since the Guest OS manages the file system and may have placed metadata or data at the end of that range, shrinking the disk from the outside would almost certainly result in file system corruption and data loss. Therefore, Huawei FusionCompute does not provide a "shrink" function for virtual disks. If a user needs a smaller disk, they must create a new, smaller disk and migrate the data at the application level.

In contrast, other resources offer more flexibility. NIC quantities (A) can be reduced by deleting a virtual network adapter from the VM configuration. CPU resources (C) and Memory resources (D) can be adjusted in the VM settings; while increasing them is common, they can also be reduced (typically requiring a VM restart to allow the Guest OS to re-initialize the hardware map). This distinction is a key exam point: compute resources are elastic in both directions (with reboot), but storage capacity in FusionCompute is strictly "expand-only" to protect user data.

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In the official Huawei HCIA-Cloud Computing documentation, specifically the "FusionAccess Security" module, the system is described as having a multi-layered security architecture. These four access management policies are the primary tools used to control entry into the virtual desktop environment.

MAC address-based control (A)allows administrators to bind specific users or groups to authorized hardware devices. This ensures that even if a password is compromised, the user can only log in from a company-issued terminal.Time-based control (B)functions as a whitelist; it defines a "valid window" (e.g., 08:00 to 18:00) during which desktop access is permitted. Outside of these hours, the system rejects connection attempts, which is critical for managing contractors or ensuring compliance with labor regulations.

IP address-based control (C)is highly flexible, supporting both blacklists (to block known malicious ranges) and whitelists (to allow only local office subnets). Administrators can define these rules for individual IPs or entire CIDR blocks. Finally,Certificate-based control (D)provides the highest level of identity assurance. Unlike the other policies which can be granular, certificate authentication is typically a global system setting in the ITA/HDC configuration. When enabled, every client must present a valid digital certificate issued by a trusted Certificate Authority (CA) before they are even prompted for a username and password.

By combining these policies, Huawei FusionAccess creates a "Zero Trust" style environment where access is granted based on the user's identity, their physical device, their location (IP), and the time of day. Understanding how to configure these policies in theITA (IT Adapter)portal is a key requirement for the HCIA-Cloud Computing certification and essential for maintaining a secure enterprise desktop cloud.

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In the official Huawei ICT Academy curriculum, virtualization is defined as the core enabling technology that transforms physical hardware into logical, manageable resources. This process involves the introduction of a virtualization layer, often referred to as a Hypervisor or Virtual Machine Monitor (VMM), which sits between the physical hardware and the operating systems. The statement is TRUE because it accurately captures the three primary characteristics of virtualization as defined in Huawei’s technical documentation: Simulation, Isolation, and Sharing.

Simulationrefers to the ability of the Hypervisor to present a consistent set of virtual hardware (CPU, Memory, I/O) to the Guest Operating System, regardless of the underlying physical vendor. This allows software to run in an environment it perceives as dedicated physical hardware.Isolationis a critical security and stability feature; it ensures that if one Virtual Machine (VM) crashes or is compromised, it does not affect the operation of other VMs on the same physical host. Each VM operates in its own logical container with dedicated boundaries. Finally,Sharingallows multiple VMs to occupy a single physical server simultaneously, maximizing resource utilization.

Before virtualization, the "one-server-one-application" model led to massive resource wastage (often using only 5%–15% of capacity). By creating alogical representationof physical resources, virtualization enablesCloud Computingto achieve its goal of multi-tenancy and elastic scaling. In Huawei’sFusionComputearchitecture, this is implemented through theCNA (Computing Node Agent), which uses the Galax88 engine to virtualize CPU and memory resources and theVNA (Virtual Node Agent)for management, effectively decoupling the software from the hardware constraints.

In FusionCompute, VM live migration between hosts withdifferent CPU modelsrequires CPU instruction compatibility. Huawei provides theIMC (Instruction Masking Compatibility) policyat the cluster level to address this issue.

TheCluster IMC policymasks advanced CPU instruction sets so that VMs only see a common subset of CPU features supported by all hosts in the cluster. This ensures that a VM can migrate safely between CNA hosts with different CPU generations or models without encountering instruction incompatibility errors.

Other options are unrelated:

I/O ring adaptationfocuses on I/O optimization.

HANA optimizationis specific to SAP HANA workloads.

Guest NUMA policyoptimizes memory access, not CPU compatibility.

Therefore, the correct answer isCluster IMC policy.

CPU virtualization is a fundamental concept in HCIA–Cloud Computing and includes multiple implementation methods.

Option A is correct. CPU virtualization is commonly categorized into full virtualization, paravirtualization, and hardware-assisted virtualization.

Option B is correct. Full virtualization allows guest operating systems to run without modification, which ensures high compatibility and portability across different platforms.

Option C is correct in the HCIA context. Paravirtualization requires modifications to the guest OS kernel, which historically limited support primarily to open-source operating systems.

Option D is false. Hardware-assisted virtualization explicitly requires CPU support, such as Intel VT-x or AMD-V. Without these features, hardware-assisted virtualization cannot function.

Therefore, the false statement is D.

VLAN technology is a fundamental topic in HCIA–Cloud Computing, especially for cloud network isolation and segmentation.

OptionAis false. Atrunk linkis designed to carry traffic frommultiple VLANs using VLAN tags (802.1Q). Untagged traffic typically belongs to anative VLAN, not multiple VLANs.

OptionBis false. Ahybrid interfacecanbe used to connect a switch to a server. Hybrid interfaces support both tagged and untagged VLAN traffic and are commonly used in server and virtualization scenarios.

OptionCis true.Trunk interfacesare primarily used to connectswitch-to-switchlinks, allowing multiple VLANs to pass between switches.

OptionDis false.Access interfacesare designed to connectend devices(such as PCs or printers) and carry traffic foronly one VLAN, not for switch interconnections.

Therefore, the false statements areA, B, and D.

According to the Huawei HCIA-Cloud Computing training materials, statement D is FALSE. In the Linux operating system, permissions are determined by the User ID (UID) and the specific privileges of the account logged in (such as the root user), not by the type of interface being used. Whether an administrator uses a Graphical User Interface (GUI) or a Command-Line Interface (CLI), the ability to modify the kernel or change system files is strictly governed by the OS's access control lists and kernel-level security modules. In many enterprise cloud environments, such as those running Huawei’s EulerOS, the GUI is often not even installed to reduce the attack surface and save resources.

The other statements are technically correct. Statement A is true because the CLI allows for automation through scripting, making it far superior for routine maintenance and batch processing. Statement B is true because a GUI requires a display server (like X11 or Wayland) and a desktop environment, which significantly increase CPU and memory overhead compared to the text-based CLI. Statement C is true because an experienced administrator can execute complex tasks with a few keystrokes in the CLI much faster than navigating multiple windows and menus in a GUI. In the official curriculum, it is emphasized that for cloud data centers, the CLI is the primary tool for O&M (Operation and Maintenance) because it provides a direct, high-performance link to the system shell. The idea that a GUI provides "higher permissions" is a common misconception; in fact, critical kernel modifications are almost exclusively performed via the CLI or system configuration files to ensure precision and auditability.

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Virtualization Technology

Description

KVM

Does not perform any hardware simulation.

Xen

Domain0 is the first VM to start on the host.

QEMU

Can simulate the implementation of an entire VM, including the CPU, memory, I/O device, USB, and NIC.

Libvirt

Can manage multiple virtualization platforms.

Huawei's technical materials differentiate between these technologies based on their specific roles within the virtualization ecosystem.KVM (Kernel-based Virtual Machine)is an open-source module within the Linux kernel. While it provides the core virtualization capabilities for CPU and memory, it is defined in the HCIA curriculum as a technology thatdoes not perform hardware simulationitself. Instead, it typically relies on hardware-assisted virtualization or integrates with other tools to handle I/O operations.

Xenis a Type-1 hypervisor that operates directly on the hardware. A unique feature of the Xen architecture isDomain0, which is a privileged virtual machine that starts first and provides the management environment and drivers for other guest VMs (DomainU). In contrast,QEMUis a pure software-based emulator. It is powerful because itcan simulate an entire VM, including all peripherals like the CPU, NIC, and USB. However, because it relies on software simulation, its performance is lower than hardware-assisted technologies unless it is used as a backend for KVM.

Finally,Libvirtserves as the universal management layer. It is a set of open-source library functions and APIs that allow administrators tomanage multiple virtualization platforms(including KVM, Xen, and VMware) using a standardized command set. It provides transparency to upper-layer management software by abstracting the complexities of the underlying hypervisor. Understanding how these technologies interact—such as KVM utilizing Libvirt for management and QEMU for I/O—is a critical learning objective for candidates preparing for the Huawei H13-511 exam.

FusionAccess OA security architecture adoptszone-based isolation(red, yellow, green zones).

Each zone islogically and physically isolated

Each zone has itsown FusionAccess system

Data is not allowed to flow freely between zones

OptionBis false because it incorrectly states that data can be transmitted between zones. The other statements correctly reflect FusionAccess OA security and integration characteristics.