In an M-LAG, two CE series switches send M-LAG synchronization packets through the peer-link to synchronize information with each other in real time. Which of the following entries need to be included in the M-LAG synchronization packets to ensure that traffic forwarding is not affected if either device fails? (Select All that Apply)
Answer(s): A,D
Multi-Chassis Link Aggregation Group (M-LAG) is a high-availability technology on Huawei CloudEngine (CE) series switches, where two switches appear as a single logical device to downstream devices. The peer-link between the M-LAG peers synchronizes critical information to ensure seamless failover if one device fails. Let's evaluate the entries:A . MAC Address Entries: MAC address tables map device MACs to ports. In M-LAG, synchronizing MAC entries ensures that both switches know the location of connected devices. If one switch fails, the surviving switch can forward Layer 2 traffic without relearning MAC addresses, preventing disruptions. Required.B . Routing Entries: Routing entries (e.g., OSPF or BGP routes) are maintained at Layer 3 and typically synchronized via routing protocols, not M-LAG peer-link packets. M-LAG operates at Layer 2, and while Layer 3 can be overlaid (e.g., with VXLAN), routing table synchronization is not a standard M- LAG requirement. Not Required.C . IGMP Entries: IGMP (Internet Group Management Protocol) entries track multicast group memberships. While useful for multicast traffic, they are not critical for basic unicast traffic forwarding in M-LAG failover scenarios. Huawei documentation indicates IGMP synchronization is optional and context-specific, not mandatory for general traffic continuity. Not Required.D . ARP Entries: ARP (Address Resolution Protocol) entries map IP addresses to MAC addresses, crucial for Layer 2/Layer 3 communication. Synchronizing ARP entries ensures the surviving switch can resolve IP-to-MAC mappings post-failover, avoiding ARP flooding or traffic loss. Required.Thus, A (MAC address entries) and D (ARP entries) are essential for M-LAG synchronization to maintain traffic forwarding during failover, per Huawei CE switch M-LAG design.
Huawei CloudEngine Series Switch Configuration Guide M-LAG Section; HCIP-Data Center Network Training High Availability Technologies.
Which of the following technologies are open-source virtualization technologies? (Select All that Apply)
Answer(s): B,D
Virtualization technologies enable the creation of virtual machines (VMs) by abstracting hardware resources. Open-source technologies are freely available with accessible source code. Let's evaluate each option:A . Hyper-V: Hyper-V is a hypervisor developed by Microsoft, integrated into Windows Server and available as a standalone product. It is proprietary, not open-source, as its source code is not publicly available. Not Open-Source.B . Xen: Xen is an open-source hypervisor maintained by the Xen Project under the Linux Foundation. It supports multiple guest operating systems and is widely used in cloud environments (e.g., Citrix XenServer builds on it). Its source code is freely available. Open-Source.C . FusionSphere: FusionSphere is Huawei's proprietary virtualization and cloud computing platform, based on OpenStack and other components. While it integrates open-source elements (e.g., KVM), FusionSphere itself is a commercial product, not fully open-source. Not Open-Source.D . KVM (Kernel-based Virtual Machine): KVM is an open-source virtualization technology integrated into the Linux kernel. It turns Linux into a Type-1 hypervisor, and its source code is available under the GNU General Public License. It's widely used in Huawei's virtualization solutions. Open-Source.Thus, B (Xen) and D (KVM) are open-source virtualization technologies.
Huawei HCIP-Data Center Network Training Virtualization Technologies; Official Xen Project and KVM Documentation.
The FusionCompute logical architecture consists of two modules: ___ and CNA. (Enter the acronym in uppercase letters.)
Answer(s): A
FusionCompute is Huawei's virtualization platform, part of the FusionSphere ecosystem, designed for managing virtualized resources in data centers. Its logical architecture consists of two primary modules:VRM (Virtualization Resource Management): VRM is the management module responsible for centralized control, resource allocation, and monitoring of virtual machines, hosts, and clusters. It provides the user interface and orchestration capabilities for administrators to manage the virtualized environment.CNA (Compute Node Agent): CNA runs on physical hosts and handles the execution of virtualization tasks, such as VM creation, resource scheduling, and communication with the underlying hypervisor (typically KVM in Huawei's implementation). It acts as the compute node agent interfacing with the hardware.Together, VRM and CNA form the core logical architecture of FusionCompute, with VRM managing the environment and CNA executing the compute tasks. The answer, per Huawei's documentation, is VRM.
Huawei FusionCompute Product Documentation Architecture Overview; HCIP-Data Center Network Training FusionCompute Section.
Linux consists of the user space and kernel space. Which of the following functions are included in the kernel space? (Select All that Apply)
Answer(s): A,B,C
In Linux, the operating system is divided into user space (where applications run) and kernel space (where the OS core functions execute with privileged access to hardware). Let's evaluate each function:A . The NIC Driver Sends Data Frames: Network Interface Card (NIC) drivers operate in kernel space, managing hardware interactions like sending and receiving data frames. This is a low-level task requiring direct hardware access, handled by the kernel's network stack. Included in Kernel Space.B . Data Encapsulation: Data encapsulation (e.g., adding headers in the TCP/IP stack) occurs in the kernel's network subsystem (e.g., via the protocol stack like IP or TCP). This process prepares packets for transmission and is a kernel-space function. Included in Kernel Space.C . Bit Stream Transmission: This refers to the physical transmission of bits over the network, managed by the NIC hardware and its driver in kernel space. The kernel coordinates with the NIC to send bit streams, making this a kernel-space function. Included in Kernel Space.D . Data Encryption: Encryption (e.g., via OpenSSL or application-level VPNs) typically occurs in user space, where applications or libraries handle cryptographic operations. While the kernel supports encryption (e.g., IPsec in the network stack), the actual encryption logic is often offloaded to user- space tools, not a core kernel function in standard contexts. Not Typically in Kernel Space.Thus, A, B, and C are functions included in the kernel space, aligning with Linux architecture in Huawei's DCN context.
Huawei HCIP-Data Center Network Training Linux Basics; Linux Kernel Documentation Kernel vs. User Space.
A vNIC can transmit data only in bit stream mode.
Answer(s): B
A vNIC (virtual Network Interface Card) is a software-emulated network interface used by virtual machines to communicate over a virtual or physical network. The statement's reference to "bit stream mode" is ambiguous but likely implies raw, low-level bit transmission without higher-layer processing.vNIC Functionality: A vNIC operates at a higher abstraction level than physical NICs. It interfaces with the hypervisor's virtual switch (e.g., Open vSwitch in Huawei environments) and handles data in frames or packets (e.g., Ethernet frames), not just raw bit streams. The hypervisor or host NIC handles the physical bit stream transmission.Data Transmission: vNICs support various modes depending on configuration (e.g., VirtIO, SR-IOV passthrough), transmitting structured data (frames/packets) rather than solely raw bits. Bit stream transmission is a physical-layer task, not the vNIC's sole mode.Thus, the statement is FALSE (B) because a vNIC does not transmit data only in bit stream mode; it handles higher-level data structures, with bit-level transmission managed by underlying hardware.
Huawei HCIP-Data Center Network Training Virtualization Networking; FusionCompute Networking Guide.
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