H19-404_V1.0 Questions and Answers

A terminal-type survey primarily determines the appropriate network admission control solution. Different terminal categories have different authentication capabilities and security requirements. Corporate laptops may support 802.1X authentication, guests may require Portal authentication, and printers, cameras, sensors, and other dumb terminals commonly require MAC-address authentication or automatic terminal identification.

Huawei recommends selecting authentication technologies according to the terminal type and usage scenario. For example, access switches can serve as authentication points for wired dumb terminals, while APs or other access devices can perform authentication for wireless users. After terminal identification is enabled, iMaster NCE-Campus can automatically assign VLANs, ACLs, security groups, QoS parameters, and other authorization policies according to terminal category.

The survey therefore establishes which endpoints support interactive authentication, which require non-interactive admission, and which must receive special isolation or compliance policies. It does not independently determine the complete physical network architecture or the overall O & M platform. Consequently, the terminal survey is used to formulate the network admission control solution, making option C correct.

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The AR5710-SE is the security-enhanced model that supports intrusion prevention, antivirus, and URL filtering concurrently. The “SE” variant is designed for branch scenarios requiring integrated routing and advanced security processing instead of only basic WAN connectivity and packet forwarding.

IPS examines network traffic for attack signatures and abnormal behavior and can block detected intrusions. Antivirus inspection identifies malicious files or content using security-signature databases. URL filtering controls access to websites based on categories, reputation, or explicitly configured allowlists and blocklists. Supporting all three functions simultaneously allows the AR5710-SE to operate as both an SD-WAN CPE and a secure branch egress gateway, reducing the requirement for an additional branch firewall.

Huawei’s SD-WAN security architecture identifies firewall protection, antivirus, IPS, and URL filtering as its principal service-traffic security functions. Huawei also recommends advanced security functions such as URL filtering, IPS, and antivirus for branch scenarios requiring stronger Internet-egress protection. Among the listed models, the AR5710-SE provides the combined feature set. Therefore, option A is correct.

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In the product and course version covered by this examination, SD-WAN virtual CPEs can be deployed on AWS, Alibaba Cloud, and Microsoft Azure. A vCPE such as Huawei AR1000V provides SD-WAN routing functions as a virtual machine within a supported public-cloud infrastructure. It can connect enterprise branches to workloads hosted in the cloud and bring the cloud environment under the same controller-based management and policy-orchestration framework as physical CPEs.

This deployment provides one-hop cloud access, avoids unnecessarily routing cloud-bound traffic through a remote headquarters, and enables unified overlay networking between branches, data centers, and cloud virtual networks. Huawei states that the AR1000V virtual SD-WAN router can be deployed in public clouds to implement branch-to-cloud interconnection and unified policy orchestration. Huawei also describes flexible deployment of physical CPEs and vCPEs for cloud-access and PoP-based acceleration scenarios.

Huawei Cloud is not included in the supported public-cloud list represented by this specific H19-404 question. Product compatibility is version-dependent, so the correct examination answer is A, B, and C.

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Huawei SD-WAN supports full-mesh, hub-spoke, and partial-mesh interconnection models. In a full-mesh topology, every site can communicate directly with the other sites. This model minimizes intermediate forwarding and is appropriate when branches frequently exchange latency-sensitive traffic such as voice, video, or collaborative application data.

In a hub-spoke topology, branch sites communicate with a central headquarters or data-center hub. Branch-to-branch traffic normally traverses that hub. The model is simple, scalable, and suitable for enterprises whose applications and shared resources are concentrated at headquarters.

Partial-mesh is used when most sites can communicate directly but some sites lack direct underlay connectivity or do not require direct tunnels. Those sites can communicate through a redirect or intermediate site. Huawei describes full-mesh, hub-spoke, and partial-mesh as supported topology designs and explains the role of a redirect site in partial-mesh networking.

“Partial-spoke” is not a defined SD-WAN topology model. A spoke is a role within hub-spoke networking rather than an independent partial-spoke topology. Therefore, A, B, and D are correct.

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The statement is true. In this three-layer campus design, aggregation switches function as VXLAN edge nodes and distributed gateways, while access switches provide terminal connectivity. Policy association allows the access switches to participate in user admission and policy enforcement without requiring them to support full VXLAN functions.

The access switch collects terminal access information and associates user traffic with the appropriate service or policy. The aggregation switch, acting as the fabric edge and VXLAN tunnel endpoint, performs VXLAN encapsulation, distributed gateway forwarding, and policy-related operations. Huawei specifically states that when aggregation switches operate as edge nodes, access switches do not need to support VXLAN and can cooperate with aggregation switches through policy association. This also permits legacy access switches to be reused.

The design reduces upgrade costs and avoids extending complex overlay configurations to every access device. Huawei’s automated virtual-network deployment model also explicitly includes policy association between the aggregation and access layers, allowing access switches without VXLAN capability to operate as transparent or associated access nodes. Therefore, option A is correct.

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SM4 is the supported SM-series cryptographic algorithm intended by this question. SM4 is a standardized symmetric block cipher that uses a 128-bit block size and a 128-bit key. It is suitable for high-volume data encryption because symmetric cryptography can process service traffic efficiently compared with public-key algorithms.

Within an SD-WAN or IPsec context, the bulk traffic carried through secure data channels requires a symmetric encryption algorithm. SM4 can therefore be used as the encryption component of an approved cryptographic suite where compliance with Chinese commercial cryptography requirements is necessary.

SM2 is an asymmetric public-key cryptographic suite used for functions such as digital signatures, key exchange, and public-key encryption. It is not the bulk data-encryption algorithm requested in this item. SM1 is a restricted proprietary algorithm whose implementation details are not publicly standardized in the same manner, while SM5 is not the supported option represented by the Huawei course question.

Huawei’s SD-WAN architecture uses IPsec to protect site-to-site services and supports secure GRE-over-IPsec data channels between edge devices. In the SM-series selection presented here, the correct supported traffic-encryption algorithm is SM4.

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For the R024C10 software release specified in the question, the AR6700V-L cannot be deployed on Google Cloud Platform. The supported environments represented by this release and question are Amazon Web Services, Oracle Cloud, and Microsoft Azure.

Public-cloud support for a virtual CPE is release-specific. A virtual router requires more than generic virtual-machine compatibility. Huawei must provide or validate the appropriate cloud image, virtual network-interface drivers, deployment template, bootstrap mechanism, licensing integration, resource specifications, and controller-registration process for each cloud platform. Therefore, support for one KVM- or VMware-based environment does not automatically mean that every public-cloud provider is supported.

A cloud-hosted virtual CPE enables branches to establish overlay connectivity directly with cloud workloads and allows the controller to provide unified management and policy orchestration for physical and virtual edge devices. Huawei describes this model as deploying a virtual SD-WAN router on a public cloud to implement branch-to-cloud interconnection and unified policy orchestration. Under the R024C10 compatibility matrix tested by this question, GCP is excluded. Therefore, option B is correct.

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GRE is a multiprotocol encapsulation mechanism and can carry all the listed packet types. It inserts a GRE header around the original payload and then places the resulting GRE packet inside a delivery-protocol packet. Because the GRE header contains a Protocol Type field identifying the encapsulated payload, GRE is not restricted to ordinary IPv4 unicast traffic.

IPv6 packets can be transported as GRE payloads when supported by the tunnel endpoints. IP unicast traffic is the most common use case. GRE can also carry IP multicast and broadcast packets, which is one of its major advantages over basic IPsec tunnel selectors that traditionally focus on IP unicast traffic. This enables routing protocols, multicast applications, discovery traffic, and other non-unicast services to operate across a logical point-to-point tunnel.

RFC 2784 defines GRE as a general mechanism for encapsulating an arbitrary network-layer protocol over another network-layer protocol. It also defines the Protocol Type field used to identify the carried payload. Huawei uses GRE as an SD-WAN overlay data-channel option and can additionally secure it using IPsec when confidentiality and integrity are required.

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The capabilities introduced with Wi-Fi 7 are 4096-QAM and channel bandwidth of up to 320 MHz. Wi-Fi 7, based on IEEE 802.11be Extremely High Throughput, doubles the maximum channel width available under Wi-Fi 6 and Wi-Fi 6E from 160 MHz to 320 MHz where sufficient regulatory spectrum is available. It also introduces 4096-QAM, encoding 12 bits per modulation symbol compared with 10 bits for Wi-Fi 6’s 1024-QAM. This can increase peak spectral efficiency when the signal-to-noise ratio is sufficiently high.

The other options were available before Wi-Fi 7. Support for up to eight spatial streams existed in earlier IEEE 802.11 generations, and MU-MIMO was already supported before Wi-Fi 7, with major uplink and downlink enhancements delivered by Wi-Fi 6. The 6 GHz band was commercially introduced through Wi-Fi 6E. Huawei’s material specifically describes Wi-Fi 6E as extending Wi-Fi 6 into the 6 GHz spectrum. Wi-Fi 7 continues using 6 GHz but did not introduce it. Therefore, only A and C are correct.

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A high-density 400GE service card for the CloudEngine S16700 series can provide 18 ports. The S16700 is positioned as a next-generation flagship campus core switch designed for ultra-high-capacity aggregation, large-scale Wi-Fi backhaul, data-center interconnection, and long-term bandwidth evolution.

An 18-port 400GE card provides a theoretical aggregate port rate of 7.2 Tbit/s in each direction before considering the switching fabric’s internal architecture and forwarding design. This density allows a single chassis slot to aggregate numerous high-speed distribution switches, connect multiple campus fabrics, or provide high-bandwidth links toward data centers and service platforms. It also reduces the number of cards and chassis required compared with lower-density 8-port, 12-port, or 16-port alternatives.

The question asks specifically for the number of physical 400GE interfaces offered by the card, not the entire chassis capacity or the number of ports after breakout. Under the H19-404 product-portfolio specification represented by this question, the correct density is 18 native 400GE ports. Therefore, option B is correct.

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Enabling the GRE checksum is optional. A functional point-to-point GRE tunnel requires a tunnel interface, GRE as the tunnel protocol, and reachable source and destination tunnel endpoints. The source identifies the local interface or IP address used to construct the delivery header, while the destination identifies the remote GRE endpoint. Without these endpoint parameters, the device cannot correctly encapsulate and deliver packets to the peer.

The checksum field is controlled by the Checksum Present bit in the GRE header. When checksum processing is enabled, the sender includes a checksum covering the GRE header and payload, and the receiver verifies it. This can provide additional corruption detection, but it increases processing and is not required for basic GRE operation. RFC 2784 explicitly labels the checksum field as optional and states that it is present only when the Checksum Present bit is set.

Huawei SD-WAN uses GRE or GRE over IPsec to establish data channels between edge devices. The essential tunnel and transport-network information is distributed through the control system, while optional GRE functions such as checksum validation may be enabled according to operational requirements.

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Huawei SD-WAN provides all four technologies. Per-flow load balancing distributes separate application flows among multiple links that have the same priority and satisfy the required SLA. Per-packet load balancing can transmit packets from one flow across multiple eligible links, improving aggregate bandwidth utilization for large file transfers, backups, and replication.

Multi-fed and selective receiving duplicates critical traffic across different links. The receiving device selects valid packets, removes duplicates, and preserves packet order. Packet loss or failure on one path therefore does not interrupt the service, enabling zero-millisecond link switchover in applicable deployments.

A-FEC dynamically generates redundant packets and adjusts the redundancy ratio according to measured packet loss. The receiving device reconstructs lost packets, reducing video freezing and voice-quality deterioration. Huawei describes both adaptive FEC and multi-fed selective receiving as WAN-optimization mechanisms for key traffic.

Intelligent traffic steering selects links according to application identity, quality, bandwidth, priority, and load. Therefore, A, B, C, and D are all correct.

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APs support barcode scanning through the CloudCampus APP, DHCP Option 148–based deployment, and deployment through Huawei’s registration query center. With barcode scanning, the installer scans the AP’s label using the CloudCampus APP. The application obtains information such as the electronic serial number and MAC address, associates the AP with the correct tenant and site, and allows the AP to register with iMaster NCE.

With DHCP Option 148, the DHCP server supplies the AP with its IP configuration and the IP address and port number of iMaster NCE. The AP changes to cloud-management mode and automatically initiates registration. Huawei lists AR routers, switches, and APs as supported devices for this mode.

The registration query center can also provide the controller address after the AP contacts Huawei’s query service. It supports APs together with ARs, firewalls, and switches. Email-based deployment is primarily an SD-WAN CPE or AR-router ZTP method, not an AP deployment mode. Therefore, A, C, and D are correct.

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