HCSP Presales H19-404_V1.0最新問題集で2026年09月14日
2026年最新の問題をマスター！HCSP Presales合格目指そう！H19-404_V1.0リアル試験問題集！
質問 # 17
Which of the following protocol data packets can be encapsulated in a VPN using GRE?
- A. IP broadcast data packets
- B. IP unicast data packets
- C. IP multicast data packets
- D. IPv6 data packets
正解：A、B、C、D
解説：
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.
質問 # 18
Which of the following parameters is not mandatory for GRE configuration?
- A. Destination IP address of the tunnel
- B. GRE protocol for the tunnel
- C. Enabling the GRE checksum
- D. Source IP address of the tunnel
正解：C
解説：
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.
質問 # 19
Which of the following Wi-Fi 7 APs offers PCIe card-based IoT functions?
- A. AirEngine 5773-25HW
- B. AirEngine 6776I-X6TH
- C. AirEngine 8771-X1T
- D. AirEngine 6776-58TI
正解：B
解説：
The AirEngine 6776I-X6TH is the model designed to provide PCIe card-based IoT expansion. The PCIe interface enables an appropriate IoT expansion card to be installed so that the AP can support additional wireless or sensing technologies according to the deployment requirement. This allows the same physical access infrastructure to deliver enterprise Wi-Fi and IoT connectivity.
The capability is useful in retail, healthcare, education, manufacturing, and asset-management environments, where technologies such as Bluetooth, RFID, Zigbee, electronic shelf labels, location services, or specialized sensing systems may need to coexist with the WLAN. A modular card design is preferable when an organization requires selectable or upgradeable IoT functions rather than only fixed integrated capabilities.
Huawei's Wi-Fi and IoT convergence architecture reduces repeated cabling, separate power systems, and independently managed wireless networks. It enables an IoT-capable AP to provide the installation position, power, management connectivity, and uplink data channel required by IoT modules. Among the models listed, the AirEngine 6776I-X6TH is the PCIe card-based IoT model. Therefore, option A is correct.
質問 # 20
It is recommended that policy association be deployed between the access and aggregation layers when distributed VXLAN gateways are used and VXLAN is deployed across the core and aggregation layers.
- A. True
- B. False
正解：A
解説：
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.
質問 # 21
On which public cloud can the AR6700V-L running R024C10 not be deployed?
- A. AWS
- B. GCP
- C. Microsoft Azure
- D. Oracle Cloud
正解：B
解説：
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.
質問 # 22
What is the function of the PROFINET DCP?
- A. Connects the controller to the I/O device and parameterizes related objects.
- B. Exchanges alarms between the controller and I/O device.
- C. Exchanges process data between the controller and I/O device.
- D. Discovers devices and assigns IP addresses.
正解：D
解説：
PROFINET DCP, meaning Discovery and Basic Configuration Protocol, is used during device discovery and initial network configuration. It operates at the data-link layer and enables an engineering station or PROFINET IO controller to locate devices on the local Ethernet segment, identify them by MAC address or station name, assign a PROFINET device name, and configure IP parameters such as the IP address, subnet mask, and default gateway.
DCP is therefore not responsible for normal cyclic process-data exchange. Real-time PROFINET communication performs that function after the controller and I/O device have been configured and an application relationship has been established. Alarm exchange and acyclic parameterization are also handled through other PROFINET communication relationships and services.
The distinction matters during commissioning. A new I/O device may initially have no usable IP configuration. DCP allows the controller or engineering tool to discover it at Layer 2 and provision the identity and addressing information required before higher-layer communication can begin. PROFINET documentation identifies DCP as mandatory for assigning IP addresses and configuring station names on the local network.
質問 # 23
Which of the following statements is false about the energy-saving function of the digital map?
- A. It automatically powers off switches.
- B. It displays the energy consumption of network-wide devices.
- C. It automatically recommends energy-saving periods.
- D. It automatically powers off some wireless APs during energy-saving periods.
正解：A
解説：
Option C is false. The digital-map energy-saving function provides network-wide energy visibility, identifies periods of low wireless demand, and recommends appropriate energy-saving time windows. During an approved energy-saving period, selected wireless APs or radio resources can be placed into an energy-saving state after the system evaluates coverage, traffic, and capacity requirements.
Automatically powering off switches is not the intended function. Campus switches may carry essential wired services, provide uplinks for other network devices, and supply PoE power to APs, cameras, phones, sensors, and access-control systems. Automatically shutting down a complete switch could therefore interrupt many unrelated services and potentially disconnect downstream network segments.
Huawei identifies low-carbon and energy-saving operation as a characteristic of cloud campus networks and combines this objective with AI-based intelligent O & M and proactive optimization. Its intelligent O & M architecture analyzes AP load trends and performs predictive wireless-network optimization, providing the analytical foundation for selecting safe energy-saving periods and resources.
Therefore, A, B, and D describe supported digital-map energy-saving capabilities. Automatic switch power- off is the false statement, making C correct.
質問 # 24
Which of the following WLAN networking solutions is recommended when there are 15,000 wireless terminals on the customer network?
- A. All of the above
- B. Core switch + aggregation switch + access switch + native WAC + AP
- C. Core switch + access switch + native WAC + AP
- D. Core switch + aggregation/access switch + standalone WAC + AP
正解：D
質問 # 25
iMaster NCE-Campus can implement refined policy control over user permissions. Which of the following can be used as policy conditions?
- A. Access mode
- B. Access location
- C. User identity
- D. Terminal type
正解：A、B、C、D
解説：
All four options can be used as conditions by the iMaster NCE-Campus intelligent policy engine. Huawei describes this capability through a 5W1H-based policy model. "Who" represents the user identity, user group, or role. "Where" represents the access location, including the site, region, device group, device, SSID, or IP address. "How" represents the access mode, such as wired or wireless access and the authentication method used. "What" represents the terminal type or device attributes, including PCs and mobile operating systems.
The platform can combine these conditions rather than evaluating them independently. For example, a finance employee using a corporate laptop through wired 802.1X access at headquarters can receive different permissions from the same employee connecting through a personal mobile device at a branch. The authorization result can include a VLAN, ACL, security group, bandwidth limit, DSCP value, application policy, or URL-filtering rule.
This multidimensional evaluation enables context-aware, fine-grained access control. Therefore, A, B, C, and D are all correct.
質問 # 26
What are the objectives of the next-generation advanced industrial network with an open architecture?
- A. Network-security integration
- B. Network intelligence
- C. IP-based connections
- D. Networked devices
正解：A、B、C、D
解説：
All four options represent objectives of a next-generation advanced industrial network. IP-based connections establish a standardized communications foundation, allowing production systems, controllers, sensors, machines, and management platforms to communicate through scalable Ethernet and IP technologies instead of isolated proprietary field networks.
Networked devices extend connectivity across operational technology assets so that equipment status, production data, and control information can be shared across production lines, plants, data centers, and cloud platforms. Network intelligence introduces automated provisioning, telemetry, analytics, fault prediction, policy optimization, and closed-loop operations. These capabilities reduce manual configuration and improve production availability.
Network-security integration is equally essential because greater openness and interconnection increase the potential attack surface. Security must therefore be integrated into access control, segmentation, device identification, encrypted communication, anomaly detection, and policy enforcement rather than added as an isolated external system. Huawei's broader CloudCampus architecture similarly emphasizes automated provisioning, intelligent O & M, secure interconnection, integrated wired and wireless management, and open network capabilities. The four objectives collectively create an open, connected, intelligent, and secure industrial communications architecture.
質問 # 27
Which of the following are common terminal identification methods?
- A. MAC OUI
- B. SNMP query
- C. Nmap
- D. DHCP option
正解：A、B、C、D
解説：
All four options are recognized terminal identification methods. MAC OUI examines the first three bytes of a device's MAC address to determine its manufacturer, although it generally cannot identify the exact model or operating system. DHCP option identification analyzes fields such as DHCP options 12, 55, and 60, which can reveal the hostname, parameter-request list, vendor class, and other terminal characteristics. SNMP query is an active identification method that retrieves device details from relevant MIB objects and is particularly useful for printers, network devices, and other SNMP-capable equipment.
Nmap is also an active scanning method. It analyzes open ports, service responses, protocol behavior, and operating-system fingerprints to estimate a terminal's device type and OS. Huawei distinguishes information- reporting methods from proactive scanning methods: MAC OUI and DHCP options generally use information observed in traffic, whereas SNMP and Nmap actively query or scan the endpoint. iMaster NCE-Campus can correlate multiple fingerprints to improve identification accuracy and automatically apply terminal-specific access policies.
質問 # 28
Huawei provides an innovative technology that can maintain smooth video when traffic packet loss between enterprise branches reaches up to 20%. Which technology provides this capability?
- A. FEC
- B. IFIT
- C. A-FEC
- D. IPCA
正解：C
解説：
A-FEC, or Adaptive Forward Error Correction, is the correct technology. It protects delay-sensitive traffic by adding calculated redundant packets to the original packet stream. If some original packets are lost during WAN transmission, the receiving edge device can reconstruct them using the surviving original and redundant packets rather than waiting for end-to-end retransmission.
The key distinction between ordinary FEC and A-FEC is adaptation. With A-FEC, the receiving device reports real-time packet-loss and continuous-loss information to the transmitting device through FEC acknowledgement messages. The transmitting edge then dynamically increases or decreases the redundancy ratio according to actual network conditions. This provides stronger recovery during severe loss while avoiding unnecessary bandwidth overhead when link quality improves. Huawei describes this feedback- controlled adjustment as a mechanism that can alleviate or eliminate the impact of packet loss.
IFIT and IPCA are primarily measurement and service-quality analysis technologies; they do not reconstruct lost video packets. Fixed FEC does not adapt its redundancy level as effectively to changing loss conditions.
Therefore, the technology intended for smooth video under packet loss of up to 20% is A-FEC.
質問 # 29
What are the two IPsec data encapsulation modes?
- A. Transport mode
- B. ESP mode
- C. AH mode
- D. Tunnel mode
正解：A、D
解説：
The two IPsec encapsulation modes are transport mode and tunnel mode. In transport mode, IPsec protects the upper-layer payload of the original IP packet while retaining the original IP header as the packet's outer header. It is commonly associated with end-to-end host communication, although it can also protect a GRE packet between tunnel endpoints.
In tunnel mode, IPsec protects the complete original IP packet and adds a new outer IP header containing the addresses of the IPsec peers. This mode is commonly used between security gateways, routers, or site-to-site VPN endpoints because the original source and destination information can be protected within the encrypted inner packet. RFC 4301 formally defines transport and tunnel as the two IPsec security-association modes.
AH and ESP are not encapsulation modes. They are IPsec security protocols. Authentication Header provides integrity and source authentication but not encryption. Encapsulating Security Payload can provide encryption, integrity, authentication, and anti-replay protection. Either protocol can conceptually operate in transport or tunnel mode, although ESP is overwhelmingly used for encrypted enterprise VPN and SD-WAN data channels.
質問 # 30
Which solution can be used when users need to centrally control and manage Internet access traffic but do not have the required security-processing capability?
- A. There is no solution.
- B. Deploy professional security devices at the headquarters.
- C. Deploy advanced security capabilities on CPEs.
- D. Connect to third-party security services to centrally control and manage services.
正解：B
解説：
Professional security devices should be deployed at the headquarters or another centralized Internet-access site. Under centralized Internet access, branch Internet traffic is first carried through the SD-WAN overlay to the centralized gateway. The headquarters security infrastructure then performs access control and security inspection before forwarding the traffic to the Internet.
This approach is appropriate when branch CPEs lack sufficient processing capacity or advanced security functions. A centralized firewall or dedicated security platform can provide intrusion prevention, antivirus inspection, URL filtering, application control, content security, and unified logging. It also allows the enterprise to enforce one consistent security policy instead of maintaining separate advanced configurations at every branch.
Deploying advanced security capabilities on each CPE, as proposed in option C, is a distributed local- breakout design and does not satisfy the stated limitation concerning security-processing capability. Third- party cloud security services can be used in some site-to-cloud or secure Internet-access architectures, but they are not the intended headquarters-based centralized solution in this question.
Huawei explicitly states that centralized Internet traffic is diverted to the centralized access site and that the firewall function is deployed there to secure Internet services. Therefore, option D is correct.
質問 # 31
Which of the following statements is false about Layer 3 roaming?
- A. Before and after Layer 3 roaming, the SSID remains the same, but the service VLANs are different.
- B. The IP address of a STA changes after Layer 3 roaming.
- C. When Layer 3 roaming occurs for a STA, the STA's traffic is diverted to the HAP.
- D. The HAP is determined when the STA accesses the network for the first time.
正解：B
解説：
Option B is false because a station retains its original IP address during Layer 3 roaming. Preserving the IP address is essential for maintaining active application sessions when the station moves between APs associated with different service VLANs, Layer 2 domains, and gateways. Huawei's training diagram shows the same station IP address before and after roaming, while the service VLAN changes.
When the STA initially accesses the WLAN, a Home AP or HAP is selected for it. After the STA roams to a Foreign AP, the new AP obtains the station information and establishes the required forwarding relationship with the HAP. In direct-forwarding implementations, the STA's traffic is encapsulated and forwarded to the HAP, which preserves access through the original network and gateway.
Therefore, A and C accurately describe HAP-based Layer 3 roaming. Option D is also correct: the APs use the same SSID and authentication mode but different service VLANs. The station's IP address does not change, so B is the false statement.
質問 # 32
Which of the following can be determined through a survey of the terminal types on a customer's network?
- A. Network O & M solution
- B. Network access solution
- C. Network architecture
- D. Network admission control solution
正解：D
解説：
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.
質問 # 33
Which of the following WLAN networking solutions is recommended when there are 15,000 wireless terminals on the customer network?
- A. All of the above
- B. Core switch + aggregation switch + access switch + native WAC + AP
- C. Core switch + access switch + native WAC + AP
- D. Core switch + aggregation/access switch + standalone WAC + AP
正解：D
解説：
A network serving 15,000 wireless terminals is a large-scale WLAN and should use a standalone WAC solution. A dedicated WAC provides independent controller resources, scalable AP and user management, centralized WLAN policy control, and the ability to deploy controller redundancy without tying wireless- control capacity directly to a specific core-switch service card.
Huawei recommends a standalone WAC when the wireless network scale is large or when the wireless network is deployed independently over an existing wired campus. The WAC is typically connected to the aggregation or core layer in off-path mode, and VRRP hot standby can be used to improve reliability.
Native WAC solutions are valuable for unified wired and wireless management, authentication, forwarding, and policy enforcement. However, for a very large number of wireless terminals, the controller platform must be selected according to user, AP, traffic, and forwarding-capacity specifications. A standalone WAC allows the wireless control plane to be sized and expanded independently.
Option C provides the dedicated WAC together with the required core and aggregation or access infrastructure. Therefore, it is the recommended architecture for 15,000 wireless terminals.
質問 # 34
Which role supports MRM election?
- A. MRM
- B. MRA
- C. MIM
- D. MRC
正解：B
解説：
MRA, or Media Redundancy Auto-Manager, supports the automatic election of the Media Redundancy Manager in an MRP ring. When several devices are configured with the MRA role, they exchange control information and elect one device to perform the MRM function. The elected MRM supervises the ring, blocks one ring port during normal operation to prevent a Layer 2 loop, detects failures, and changes the forwarding state when the ring becomes open.
An MRC is a Media Redundancy Client. It participates in the MRP ring and forwards MRP control packets, but it does not initiate the automatic manager-election process. MRM represents the operational manager role after election or manual configuration, rather than the role specifically designed to support election. MIM refers to a Media Redundancy Interconnection Manager, which is associated with interconnecting and protecting multiple MRP rings rather than electing the manager within one ring. MRP itself distinguishes the ring manager from ring clients and uses the manager to control ring forwarding and recovery.
質問 # 35
Which of the following are Target Wake Time (TWT) technologies?
- A. Multicast TWT
- B. Individual TWT
- C. Broadcast TWT
- D. Implicit TWT
正解：B、C、D
解説：
Broadcast TWT, Individual TWT, and Implicit TWT are valid Target Wake Time concepts. Individual TWT establishes a wake schedule between an AP and a specific station. Broadcast TWT advertises scheduling information that multiple stations can use, reducing individual negotiation overhead and coordinating groups of devices. An implicit TWT agreement defines a repeating schedule in which subsequent wake times are calculated from the agreed wake interval instead of being renegotiated for every service period.
These mechanisms allow stations, particularly battery-powered IoT devices, to sleep for predictable periods and wake only when transmission or reception is scheduled. TWT consequently reduces power consumption, channel contention, collisions, and unnecessary medium access in dense WLAN environments. Research describing IEEE 802.11ax TWT confirms that the mechanism schedules station transmission periods and allows stations to remain asleep outside their negotiated service periods.
"Multicast TWT" is not one of the standard TWT concepts represented by this question. Broadcast scheduling can cover multiple stations, but that does not create a separate mechanism formally identified here as Multicast TWT. Therefore, the correct answers are A, B, and C.
質問 # 36
A label stack is an ordered set of labels. MPLS supports a maximum of three layers of nested labels.
- A. False
- B. True
正解：A
解説：
The statement is false. An MPLS label stack is an ordered sequence of label-stack entries, with the top label processed first and the bottom identified by the Bottom-of-Stack bit. However, the MPLS architecture does not define a universal maximum of three nested labels. An MPLS forwarding operation may replace the top label, remove it, or push one or more additional labels onto the stack.
Practical label depth is constrained by device implementation, forwarding ASIC capabilities, packet size, and the number of network functions being encoded. A conventional MPLS VPN may use two labels: a transport label and a VPN label. More advanced deployments can add labels for traffic engineering, segment routing, entropy, service chaining, or hierarchical transport. This can produce stacks deeper than three entries.
Therefore, "three layers" may describe a limitation of a particular platform, software version, or deployment design, but it is not an MPLS protocol maximum. RFC 3032 defines the stack as a sequence of four-byte entries and explicitly allows one or more entries to be pushed without specifying a three-label ceiling.
質問 # 37
Which of the following slicing modes are supported?
- A. Based on a VPN
- B. Based on a user group
- C. Based on a 5-tuple or application
- D. Based on a VLAN or port
正解：A、B、C、D
解説：
All four listed classification dimensions are supported slicing approaches in the relevant campus and SD- WAN context. A slice can be created from traffic characteristics, including a 5-tuple or an identified application, so selected flows receive dedicated forwarding, bandwidth, security, or quality policies. Huawei supports customized application identification using URLs and IP 5-tuple information, as well as application- and 5-tuple-based traffic steering and QoS.
VPN- or VN-based slicing provides logical Layer 3 isolation. Huawei's SD-WAN design maps each VN to an independent VPN instance or VRF and permits different overlay topologies, routing configurations, and policies. User-group-based slicing associates network treatment with identity or security-group membership rather than a permanently assigned IP address, supporting free mobility and consistent policy when users move. Huawei's campus architecture applies different permissions to different user groups inside a VN.
VLAN- or port-based slicing classifies traffic by the local access attachment and is useful for fixed terminals or environments without identity authentication. Therefore, A, B, C, and D are all correct.
質問 # 38
In the High-Quality 10 Gbps Campus Network Solution, which of the following experiences is improved by iMaster NCE-Campus?
- A. O & M experience
- B. Wired experience
- C. Wireless experience
- D. Application experience
正解：A
解説：
iMaster NCE-Campus primarily improves the operations and maintenance experience in this solution. It provides centralized planning, deployment, configuration, policy orchestration, monitoring, topology management, device management, alarm handling, and maintenance through a unified graphical interface.
Instead of configuring each switch, AP, WAC, firewall, or router separately, administrators can define services and policies centrally and deliver them across the network. Huawei states that iMaster NCE-Campus provides integrated LAN and WAN management, integrated deployment, integrated policies, and integrated O
& M, thereby improving deployment and O & M efficiency. It also provides network monitoring, service alarms, file management, log management, device maintenance, user management, and virtual-network management from one platform.
Wireless, wired, and application experience analysis is more directly associated with iMaster NCE- CampusInsight, which uses telemetry, AI, protocol tracing, and predictive analysis to quantify user and application experience. iMaster NCE-Campus serves as the management and control platform that simplifies administrators' daily work. Therefore, the experience specifically improved by iMaster NCE-Campus is the O
& M experience, making option C correct.
質問 # 39
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