View Full Huawei H12-821 Exam Dumps and Practice Test Dumps.

Question 301. What is the PRIMARY role of iMaster NCE-Campus in a Huawei campus network solution?

1. To operate only as a DHCP server
2. To replace all campus switches with software
3. To provide centralized management, configuration, service provisioning, and O&M for campus network devices
4. To function only as an Internet firewall

Correct Answer: 3. To provide centralized management, configuration, service provisioning, and O&M for campus network devices

Explanation:

iMaster NCE-Campus acts as a centralized management and control platform for Huawei campus networks. It can bring switches, routers, WLAN devices, and other supported equipment under unified management and automate configuration and service deployment. Rather than configuring large numbers of devices individually, administrators can define services centrally and allow the controller to deliver the required configuration. The platform also supports monitoring, topology visibility, device status collection, and other O&M functions. This controller-based approach reduces manual configuration effort and helps maintain consistent network policies across large campuses containing many access, aggregation, core, and wireless devices.

Question 302. In an SDN-oriented architecture, what is the PRIMARY function of the southbound interface of a controller?

1. To communicate with and control network devices
2. To provide Internet access directly to end users
3. To connect only to business applications
4. To perform RF transmission for APs

Correct Answer: 1. To communicate with and control network devices

Explanation:

The controller’s southbound interface connects the control and management platform to the network devices that actually forward traffic. Huawei documentation describes the southbound plane of iMaster NCE-Campus as the plane used for southbound services, including communication with devices through protocols such as NETCONF. This allows the controller to deliver configuration, receive status information, and automate device management. By contrast, northbound interfaces expose services or information toward management applications, portals, or higher-level systems. Understanding this directional distinction is fundamental to controller-based networking and software-defined network architecture.

Question 303. Which protocol is commonly used by iMaster NCE-Campus as a southbound mechanism to manage Huawei switches?

1. SMTP
2. FTP only
3. SIP
4. NETCONF

Correct Answer: 4. NETCONF

Explanation:

Huawei iMaster NCE-Campus commonly uses NETCONF to manage supported network devices. NETCONF provides a structured management mechanism that allows the controller to retrieve configuration information and deliver configuration changes programmatically. Huawei deployment documentation shows switches establishing NETCONF communication with the controller’s southbound address. This enables centralized provisioning and supports automation at a scale that would be inefficient using manual CLI access to every device. NETCONF communication is typically secured through SSH-based mechanisms, providing both structured network management and encrypted transport between the controller and managed infrastructure.

Question 304. In an SDN controller architecture, what is the general purpose of a northbound interface?

1. To establish Ethernet links between access switches
2. To expose controller capabilities and network services to applications or higher-level management systems
3. To replace the device forwarding plane
4. To form OSPF adjacencies with routers

Correct Answer: 2. To expose controller capabilities and network services to applications or higher-level management systems

Explanation:

A controller sits between applications and the underlying network infrastructure. Its northbound interface allows applications, orchestration systems, portals, and higher-level management components to consume controller services or exchange management information. The southbound side communicates toward switches, routers, and other network devices, while the northbound side faces applications and operational systems. Huawei describes iMaster NCE-Campus as supporting separate northbound and southbound service planes. This separation allows business intent and automation applications to interact with a centralized controller rather than directly programming individual forwarding devices.

Question 305. What is a major benefit of NETCONF Call Home in a campus deployment?

1. A device can proactively establish management connectivity to the controller and support plug-and-play deployment
2. It forces administrators to configure every service manually
3. It disables remote management after deployment
4. It replaces DHCP with BGP

Correct Answer: 1. A device can proactively establish management connectivity to the controller and support plug-and-play deployment

Explanation:

NETCONF Call Home supports automated device onboarding by allowing a device to initiate its management connection toward iMaster NCE-Campus. Huawei describes NETCONF-enabled switches as capable of automatically registering with the controller and then receiving centrally delivered configuration, enabling plug-and-play or zero-touch deployment scenarios. This is valuable when dozens or hundreds of access devices must be deployed at remote sites. Instead of requiring an engineer to configure every switch locally, basic bootstrap information can allow the device to reach the controller, register, and receive its intended service configuration automatically.

Question 306. Which DHCP option does Huawei use for controller information during IPv4-based zero-touch deployment of supported campus devices?

1. Option 82
2. Option 43 only
3. Option 6
4. Option 148

Correct Answer: 4. Option 148

Explanation:

Huawei supports DHCP Option 148 for zero-touch deployment when the deployment-side network uses IPv4. The DHCP server supplies ordinary addressing information together with controller-related parameters, allowing the newly installed device to discover iMaster NCE-Campus and register automatically. This significantly reduces the amount of initial configuration that must be performed manually at the deployment site. Huawei also documents Option 17 for corresponding IPv6-based deployment scenarios. The exact option and bootstrap workflow depend on the solution and device type, but Option 148 is an important Huawei controller-deployment mechanism for IPv4 networks.

Question 307. Which DHCP option is used for Huawei controller-based zero-touch deployment when the WAN-side deployment network uses IPv6?

1. Option 148
2. Option 17
3. Option 43
4. Option 82

Correct Answer: 2. Option 17

Explanation:

Huawei distinguishes zero-touch deployment options according to the underlying IP version. DHCP Option 148 is used for IPv4 deployment, while DHCP Option 17 is used when the WAN-side deployment network operates with IPv6. The DHCP response provides the new device with information required to reach the controller in addition to ordinary network configuration. Once underlay connectivity is available, the device can register with iMaster NCE-Campus and receive its assigned configuration. This enables scalable deployment without requiring extensive on-site CLI work for every individual device.

Question 308. What is the PRIMARY purpose of Huawei’s registration query center in a zero-touch deployment workflow?

1. To calculate OSPF shortest paths
2. To store user WLAN passwords
3. To help a factory-default device discover the correct iMaster NCE-Campus controller information and register automatically
4. To replace the device operating system

Correct Answer: 3. To help a factory-default device discover the correct iMaster NCE-Campus controller information and register automatically

Explanation:

Huawei’s registration query center supports automated onboarding by acting as a discovery mechanism for devices that need to locate their assigned iMaster NCE-Campus controller. After the device is powered on and obtains network connectivity, it can contact the registration query center using its preconfigured discovery behavior. The center supplies the controller address and port information associated with the device identity, allowing it to register and go online automatically. Huawei notes that the device generally needs to be associated with the appropriate site and identifiable by information such as its ESN before successful onboarding can occur.

Question 309. Why must basic underlay IP connectivity exist before a device can complete controller-based zero-touch provisioning?

1. The device must be able to reach the controller or discovery service before centralized configuration can be delivered
2. Zero-touch deployment operates only at Layer 1
3. The controller automatically creates physical cabling
4. DHCP works only after all application policies are installed

Correct Answer: 4. The device must be able to reach the controller or discovery service before centralized configuration can be delivered

Explanation:

Zero-touch provisioning automates configuration, but it does not remove the requirement for basic network connectivity. A new device first needs an IP address, gateway information, and a reachable path toward iMaster NCE-Campus or a registration/discovery service. Only after this bootstrap connectivity exists can the device register, establish its management channel, and receive centrally defined services. Huawei’s DHCP-based deployment documentation explicitly describes the device obtaining an address and access to the underlay before registering with the controller. A failure in addressing, default routing, DNS, or reachability can therefore prevent otherwise correct zero-touch deployment from succeeding.

Question 310. What is the PRIMARY benefit of centralized batch configuration through iMaster NCE-Campus?

1. It reduces repetitive manual CLI configuration and improves policy consistency across many devices
2. It eliminates the requirement for network design
3. It prevents any future configuration changes
4. It disables device-level validation

Correct Answer: 1. It reduces repetitive manual CLI configuration and improves policy consistency across many devices

Explanation:

Large campus networks can contain hundreds or thousands of switches, APs, routers, and other devices. Configuring them one at a time is slow and introduces inconsistency risk. Huawei describes NETCONF-managed devices as supporting configurations delivered centrally by iMaster NCE-Campus, enabling rapid batch service provisioning. Administrators can define standardized settings and allow the controller to translate or distribute them to the relevant infrastructure. Centralization does not eliminate the need for sound network design or validation, but it substantially reduces repetitive manual work and helps ensure that intended policies are applied consistently throughout the network.

Question 311. What is a Virtual Network (VN) in Huawei campus network virtualization?

1. A replacement for all physical devices
2. A physical cable dedicated to one user
3. A logically isolated network built over shared physical campus infrastructure
4. A DHCP option used for controller discovery

Correct Answer: 3. A logically isolated network built over shared physical campus infrastructure

Explanation:

Huawei campus virtualization allows one physical network to support multiple logically separated virtual networks. Different departments, tenants, or business services can share the same physical switching and routing infrastructure while remaining logically isolated. iMaster NCE-Campus can automate the deployment of VNs using technologies such as VLAN and VXLAN and display their logical topology. This approach reduces the need to construct a separate physical network for every business group. It also makes service deployment more flexible because logical network membership can be controlled through centralized policies rather than being tied entirely to physical cabling.

Question 312. What technology does iMaster NCE-Campus commonly use to create scalable overlay virtual networks in medium and large campus fabrics?

1. PPP
2. VXLAN
3. Frame Relay
4. STP only

Correct Answer: 2. VXLAN

Explanation:

Huawei campus fabric automation uses VXLAN to create logical overlay networks across a routed physical campus. VXLAN allows multiple VNs to share the same underlay while remaining isolated and can support both Layer 2 and Layer 3 virtual network services. Huawei documentation states that iMaster NCE-Campus uses VXLAN virtualization to carry multiple VNs and support flexible service deployment. This controller-driven approach allows administrators to provision virtualized networks without manually configuring every VXLAN-related parameter on every switch, reducing deployment complexity in medium and large campus environments.

Question 313. What is a PRIMARY benefit of VN automation in iMaster NCE-Campus?

1. It allows virtual networks, subnets, gateways, and related services to be provisioned centrally across the fabric
2. It requires administrators to configure every VTEP manually
3. It prevents multi-tenant operation
4. It removes all IP addressing from the campus

Correct Answer: 1. It allows virtual networks, subnets, gateways, and related services to be provisioned centrally across the fabric

Explanation:

VN automation lets administrators define logical network requirements centrally and have iMaster NCE-Campus provision the corresponding configuration across the fabric. Huawei lists capabilities including deployment of VXLAN and traditional VLAN networks, subnet creation, user gateways, DHCP-related services, access ports, and multi-tenant virtual networks. Central automation reduces the operational burden of configuring every switch manually and improves consistency when services span many devices. It also provides a logical network view that is easier to understand than manually correlating low-level VLAN, VNI, gateway, and interface configurations across the complete campus.

Question 314. What is Huawei Free Mobility primarily designed to achieve in a campus network?

1. To make every user a network administrator
2. To disable authentication
3. To force users to remain on one physical switch port
4. To apply access policy based on user or security-group identity rather than relying only on physical location**

Correct Answer: 4. To apply access policy based on user or security-group identity rather than relying only on physical location

Explanation:

Free Mobility separates user authorization from a fixed physical access location. Rather than building policy only around VLANs, subnets, or particular switch ports, administrators can place users or resources into security groups and define communication policy between those groups. Huawei’s iMaster NCE-Campus configuration workflow for Free Mobility includes creating security groups, resource groups, policy control, and user admission. This allows a user’s access rights to follow the user’s identity or role as the user moves to different authorized locations within the campus, simplifying policy consistency across wired and wireless environments.

Question 315. In a Free Mobility deployment, what is a security group used to represent?

1. Only one physical switch chassis
2. A logical collection of users or resources that should share similar access-policy treatment
3. An OSPF area
4. An MPLS label range

Correct Answer: 2. A logical collection of users or resources that should share similar access-policy treatment

Explanation:

Security groups provide a logical way to classify users and resources according to their role or security requirements. Instead of creating policy separately for every individual IP address or access port, the administrator places relevant identities into groups and defines communication relationships between those groups. Huawei Free Mobility workflows explicitly use security groups and policy-control configuration as foundational components. This makes access control easier to maintain when users move or addresses change, because policy follows logical identity and group membership rather than being tied exclusively to topology details such as a specific switch interface.

Question 316. What is the PRIMARY purpose of authentication bypass in an iMaster NCE-Campus-controlled fabric?

1. To permanently disable authentication for all users
2. To replace user accounts with MAC addresses
3. To provide defined fallback access behavior when devices temporarily cannot communicate with the controller
4. To convert VXLAN into a traditional VLAN automatically

Correct Answer: 3. To provide defined fallback access behavior when devices temporarily cannot communicate with the controller

Explanation:

Controller-based authentication creates dependency on communication between the access device and iMaster NCE-Campus. If that communication is temporarily unavailable, new or existing users might otherwise lose all network access. Huawei supports authentication bypass policies that define how devices should behave during this condition. Depending on security requirements, already authenticated users may retain access while new users are denied, or users may receive a limited bypass VLAN or customized policy. This allows administrators to balance availability and security instead of treating controller communication failure as an uncontrolled all-or-nothing event.

Question 317. Which authentication-bypass approach provides the strongest conservative security posture when controller communication fails?

1. Allow every new user unrestricted network access
2. Disable all security groups permanently
3. Place every device into the administrator VLAN
4. Allow already authenticated users to continue while preventing new users from obtaining access

Correct Answer: 4. Allow already authenticated users to continue while preventing new users from obtaining access

Explanation:

Huawei documents several authentication-bypass options for situations where access devices cannot communicate with iMaster NCE-Campus. The most conservative of the listed approaches is to allow users who were already authenticated to remain online while refusing new authentication attempts. This maintains service continuity for known users without granting unverified devices automatic access merely because the controller is unreachable. Other bypass options may allow unauthenticated access through a dedicated VLAN or customized policy, which can be appropriate in availability-focused environments but provide broader access during the controller outage.

Question 318. What is the PRIMARY purpose of iMaster NCE-CampusInsight in Huawei intelligent O&M?

1. To analyze collected network data using big-data and intelligent algorithms for visibility and fault analysis
2. To operate only as an Ethernet switch
3. To provide MPLS labels to P routers
4. To replace every WLAN AP

Correct Answer: 2. To analyze collected network data using big-data and intelligent algorithms for visibility and fault analysis

Explanation:

iMaster NCE-CampusInsight is Huawei’s intelligent analysis platform for campus O&M. Devices supply operational information such as performance measurements, logs, user data, AP data, and other network observations. CampusInsight stores and analyzes the information using big-data processing and intelligent algorithms. Huawei describes the resulting services as including network visibility, campus service analysis, intelligent wireless analysis, and user application-experience evaluation. Its role is therefore analytical rather than packet forwarding: network devices continue to perform the forwarding functions while CampusInsight provides the operational intelligence needed to identify problems and understand service quality.

Question 319. What is the PRIMARY operational benefit of having devices report alarms, logs, and performance information centrally to iMaster NCE-Campus?

1. Administrators gain centralized visibility into device and network health instead of checking each device individually
2. Routing protocols are no longer required
3. Every network failure is repaired automatically
4. The forwarding plane is moved into the controller

Correct Answer: 1. Administrators gain centralized visibility into device and network health instead of checking each device individually

Explanation:

Centralized data reporting allows iMaster NCE-Campus to maintain an up-to-date picture of device status, alarms, logs, terminal information, and network health. Huawei documentation explains that supported switches, APs, WACs, routers, and other devices can report information to the controller, which then presents health and status through its management interface. This significantly improves operational efficiency because an engineer does not have to log in to each individual device to collect basic diagnostic information. Centralized visibility also makes it easier to correlate events across different parts of the network and identify broader service-impacting problems.

Question 320. A large enterprise wants zero-touch branch deployment, centralized configuration, multiple isolated business VNs over one physical campus, identity-based access policies, and centralized health analysis. Which design BEST meets these requirements?

1. Configure every device manually and build one shared Layer 2 VLAN
2. Use only static routes and standalone APs
3. Use iMaster NCE-Campus with ZTP/NETCONF device onboarding, VXLAN-based VN automation, Free Mobility security-group policies, and centralized monitoring or CampusInsight
4. Disable the controller after devices are installed

Correct Answer: 3. Use iMaster NCE-Campus with ZTP/NETCONF device onboarding, VXLAN-based VN automation, Free Mobility security-group policies, and centralized monitoring or CampusInsight

Explanation:

The requirements align with Huawei’s controller-driven campus architecture. Zero-touch deployment allows new devices to discover and register with iMaster NCE-Campus and receive configuration automatically. NETCONF provides structured southbound management. VXLAN-based fabric automation allows multiple logical VNs to share the same physical campus while remaining isolated. Free Mobility applies policy according to security-group or identity context rather than only physical location. Centralized reporting and CampusInsight then provide operational visibility and intelligent analysis. Together, these capabilities reduce manual deployment effort while supporting scalable segmentation, consistent access control, and centralized O&M across a large campus.