H13-511_V5.5 Exam Dumps : HCIA-Cloud Computing V5.5 Exam

According to the Huawei HCIA-Cloud Computing training materials, the statement is TRUE. TAP (Network TAP) is a virtual network kernel device that is part of the standard Linux kernel networking stack.2 It is "independently maintained" because it is a native Linux feature, not a proprietary tool built solely for a specific hypervisor like KVM or Xen. TAP devices operate at the Data Link Layer (Layer 2) of the OSI model, meaning they handle Ethernet frames.3

In a cloud computing environment, TAP devices are fundamental for bridging the gap between virtual machines and the physical network. When a Virtual Machine is created, the hypervisor (CNA in Huawei's case) creates a TAP device on the host. One end of this TAP device is "plugged" into the virtual machine's NIC, while the other end is connected to a virtual switch (like the DVS or Linux Bridge). This allows the VM to send and receive Ethernet frames as if it were connected to a physical switch port.

Linux maintains TAP alongside its counterpartTUN(which operates at Layer 3/Network Layer).4Because TAP carries full Ethernet headers, it is the preferred device for virtual switches, as it allows for features like VLAN tagging and MAC address learning. Huawei’s virtualization technology leverages these standard Linux kernel features to provide a high-performance, stable networking environment. Understanding that TAP is a standard, independent Linux kernel component is vital for candidates, as it explains how open-source foundations are used to build enterprise-grade cloud platforms like FusionCompute.

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In Linux-based virtualization environments, aTAP deviceis a software-based virtual network interface that operates atLayer 2of the OSI model.

TAP devices are independently maintained by the Linux kernel and are commonly used to connect virtual machines to virtual switches or bridges. They simulate physical Ethernet interfaces, allowing VMs to send and receive Ethernet frames.

This definition aligns with HCIA–Cloud Computing networking fundamentals, so the statement isTRUE.

In the FusionAccess architecture, the successful startup and availability of a virtual desktop depend on a process known as "VM Registration." According to the Huawei HCIA-Cloud Computing curriculum, the component responsible for receiving and processing these registration requests is the HDC (Huawei Desktop Controller).

The process works as follows: Each virtual desktop VM has a resident software agent called theHDA (Huawei Desktop Agent). When the VM boots up and the network is initialized, the HDA sends a registration request over the internal management network. This request contains the VM's status, its IP address, and its unique identifier. TheHDCacts as the central "command and control" center of the desktop cloud. It listens for these requests, verifies the VM's credentials against the system database (GaussDB), and updates the VM's status to "Ready" or "In Use."

The HDC is the core logical component that manages the relationship between users and their virtual desktops. If the HDC does not receive the registration request—perhaps due to a network issue or a failure of the HDA service on the VM—the desktop will appear as "Unregistered" or "Offline" in the management portal, and users will be unable to log in through the Web Interface (WI). While theITA (IT Adapter)is used by administrators totriggerthe provisioning of the VM, it does not handle the real-time registration traffic of individual VMs. Similarly, the HDA is thesenderof the request, not the receiver. Understanding the HDC's role as the registration authority is a fundamental requirement for troubleshooting connection issues and mastering the FusionAccess component interactions taught in the HCIA certification.