H12-841_V1.5 Exam Dumps - Huawei HCIP-Datacom Questions and Answers

In iMaster NCE-Campus–based virtualized campus networks,user network segmentsare logical subnets created within aVirtual Network (VN)to provide Layer 2 or Layer 3 connectivity for users. HCIP Datacom Campus Network documentation describes multiple flexible methods for creating these network segments during VN deployment, allowing administrators to balance efficiency and control.

Administrators canmanually create user network segments one by one, which is suitable for small-scale deployments or scenarios requiring precise customization of subnet parameters such as gateway address, VLAN, and IP pool. This method provides maximum control but is less efficient for large networks.

For medium- or large-scale deployments,batch import using templatesis widely supported and recommended. Templates allow administrators to define network segment parameters in advance and import multiple segments at once, significantly improving deployment efficiency and reducing configuration errors.

Another supported method isautomatic batch allocation, where iMaster NCE-Campus automatically allocates VNIs, VLANs, and IP resources from predefined resource pools. This method is commonly used in VXLAN Fabric deployments and enables fast, standardized VN provisioning with minimal manual input.

However,directly invoking user network segments from the global fabric resource poolis not supported during VN creation. The global resource pool is used for automatic allocation reference but does not allow direct binding of pre-created segments to a VN.

Therefore, the valid methods aremanual creation,template-based batch import, andautomatic batch allocation, making optionsA, B, and Dcorrect.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

To prevent users from accessing the network using statically configured IP addresses, Huawei campus networks rely on a combination ofDHCP SnoopingandIP Source Guard (IPSG). DHCP Snooping works by monitoring DHCP message exchanges and building atrusted binding tablethat records legitimate IP–MAC–VLAN–interface mappings learned dynamically from a legal DHCP server. This binding table becomes the foundation for several Layer 2 security mechanisms.

IP Source Guard uses the DHCP Snooping binding table to strictly control traffic entering an interface. When IPSG is enabled, the switch permits only packets whose source IP address and MAC address match an entry in the DHCP Snooping binding table. If a user manually configures a static IP address, no valid DHCP binding exists for that host, so IPSG drops the traffic and denies network access. This directly prevents statically configured IP addresses from being used to access the network.

Dynamic ARP Inspection (DAI) focuses on preventing ARP spoofing and man-in-the-middle attacks, not static IP misuse. Port Security limits MAC addresses per interface but does not verify IP address legitimacy. Therefore, neither DAI nor Port Security alone can prevent users from assigning static IP addresses.

According to HCIP Datacom Campus Network security design principles,only the combination of DHCP Snooping and IPSGeffectively enforces IP address legitimacy and blocks statically configured IP access, making optionCthe correct answer.

In Huawei CloudCampus wireless solutions for small- and medium-sized campus networks,refined traffic controlmeans the ability to precisely limit and manage bandwidth consumption at theindividual user level. Among the available rate limiting modes,user-based rate limitingis specifically designed to meet this requirement.

User-based rate limiting applies bandwidth control policiesper authenticated user, regardless of which SSID, AP, or radio the user is connected to. This allows administrators to ensure fair bandwidth allocation, prevent a single user from monopolizing wireless resources, and provide differentiated service levels for different user roles, such as employees, guests, or VIP users. This fine-grained control aligns with identity-based access and policy management promoted in HCIP Datacom Campus Network design.

In contrast,SSID-based rate limitingcontrols bandwidth at the service level. It limits total traffic for an entire SSID, which affects all users connected to that SSID collectively, rather than individually.Radio-based rate limitingcontrols bandwidth per radio interface, focusing on wireless resource optimization instead of user-level fairness.ACL-based rate limitingis mainly used for traffic classification and control in wired or advanced scenarios and is not suitable for per-user refined wireless traffic control in CloudCampus WLAN deployments.

Therefore, when the requirement is refined traffic control foreach individual wireless user,user-based rate limitingis the most appropriate and effective option. Hence, the correct answer isA.

In a virtualized campus network built with iMaster NCE-Campus,virtual networks (VNs)are designed to belogically isolated by default. This isolation is achieved through VXLAN and VPN instances, ensuring that users in different VNs cannot communicate unless explicit interconnection mechanisms are configured. While thepolicy control matrixis an important component of access control, it isnot sufficient by itselfto implement mutual access between users in different VNs.

According to HCIP Datacom Campus Network documentation, the policy control matrix is used to defineinter-group or inter-user access permissions, typically based onsecurity groups. It controls whether traffic is permitted, denied, or restricted between different user groups. However, the policy control matrix only definessecurity policy behaviorand does not establish Layer 3 connectivity between isolated virtual networks.

To enable mutual access between users in different VNs, the administrator must also configureinter-VN connectivity mechanisms, such asexternal networks,border nodes, orroute import and export policies. This includes enabling route exchange between VPN instances using BGP EVPN and configuring appropriate gateway or routing paths. Only after Layer 3 reachability is established can the policy control matrix take effect to permit or restrict traffic.

Therefore, deploying a policy control matrix alone does not meet the technical requirements for inter-VN communication. Bothconnectivity configuration and policy controlare required. Hence, the statement is incorrect, and the correct answer isFALSE.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

Huawei’s free mobility solution is based onsecurity group–based policy control. In this architecture, users are dynamically associated with security groups after authentication. These security group identifiers are thencarried in user trafficas metadata when packets traverse the campus network.

When traffic reaches apolicy enforcement device, such as an edge node or border node, the device does not rely on traditional attributes like IP address, MAC address, or port number to make forwarding decisions. Instead, it extracts thesource and destination security group informationembedded in the traffic and matches it against the security policy matrix configured on the controller.

This mechanism enables identity-based and location-independent access control. Even if a user moves to a different access point or changes an IP address, the same security policies continue to apply as long as the user remains in the same security group. This is the core advantage of free mobility in Huawei campus networks.

Port numbers, MAC addresses, and IP addresses are traditional Layer 2 and Layer 3 identifiers, but they do not provide sufficient context for identity-based policy enforcement. According to HCIP Datacom Campus Network documentation, security group information is the key attribute used for policy lookup and enforcement in free mobility solutions. Therefore, option A is correct.

In iMaster NCE-Campus, device management functions are tightly integrated with secure remote access mechanisms to ensure safe and efficient O&M operations. One such mechanism is theSSH proxy tunnel, which allows administrators to remotely access managed devices through the controller without directly exposing device management interfaces to the external network.

According to HCIP Datacom Campus Network documentation, theSSH proxy tunnel is automatically established when the Command Line function is usedon the Device Management page. When an administrator clicks theCommand Lineoption, iMaster NCE-Campus dynamically builds a secure SSH proxy channel between the controller and the target device. This enables real-time CLI access to the device through the web interface while maintaining strict security controls.

Other functions such asSummary,Entry Query, andDevice Configurationdo not require direct CLI interaction with the device. These functions rely on management protocols and configuration delivery mechanisms such as NETCONF or telemetry, and therefore do not trigger the establishment of an SSH proxy tunnel.

The Command Line function is specifically designed for scenarios such as advanced troubleshooting, manual verification, or executing device-level commands. Automatically enabling the SSH proxy tunnel at this moment ensures that CLI access is bothsecure and on-demand, reducing attack surfaces and simplifying remote maintenance.

Therefore, the function that automatically enables the SSH proxy tunnel isCommand Line, making optionDthe correct answer.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

Authentication Header (AH) is one of the core IPsec security protocols and is designed to provideauthentication and integrity protectionfor IP packets. AH ensures that the received packet is from a legitimate sender and that the packet has not been altered during transmission.

AH supportsdata origin authenticationby verifying the identity of the sender using cryptographic algorithms. It also providesdata integrity checking, ensuring that packet contents are not modified in transit. Additionally, AH supportsanti-replay protectionby using sequence numbers to prevent attackers from capturing and retransmitting valid packets.

However, AHdoes not provide data encryption. All packet contents, including payload data, remain visible on the network. This limitation is inherent to the AH protocol design and is one of the main reasons ESP is more widely used in modern IPsec deployments.

According to HCIP Datacom Campus Network documentation, if confidentiality through encryption is required, ESP must be used instead of AH. Therefore, the function not supported by AH is data encryption, making option D the correct answer.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

IPsec VPN supports a variety ofsymmetric encryption algorithmsto protect data confidentiality during transmission. Commonly supported algorithms includeDES,3DES, andAES, all of which are used to encrypt the payload of IP packets in ESP.

AESis the most widely recommended algorithm due to its strong security and high performance.3DESandDESare legacy algorithms that are still supported for compatibility reasons, although they are considered less secure and are gradually being phased out in modern deployments.

DSA (Digital Signature Algorithm), however, isnot an encryption algorithm. It is an asymmetric algorithm used fordigital signatures and authentication, not for encrypting data. IPsec uses DSA only indirectly in certificate-based authentication scenarios, but it is never used as a data encryption algorithm in IPsec VPNs.

According to HCIP Datacom Campus Network documentation, IPsec VPN encryption relies exclusively on symmetric encryption algorithms such as DES, 3DES, and AES. Therefore,DSA is not supported as an IPsec encryption algorithm, makingoption Athe correct answer.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

In a Layer 2 VXLAN gateway, the MAC address table recordslocal and remote MAC addressesassociated with specific Bridge Domains (BDs) and outbound interfaces. Entries learned fromremote VTEPsare shown with an outbound interface that is aVXLAN tunnel endpoint IP address, such as10.3.3.3, indicating VXLAN-based learning.

StatementAis correct because both MAC addresses0000-0000-0010and5489-9893-48a3are associated withBD 10, meaning they are in the same Layer 2 broadcast domain.

StatementCis correct because MAC entries learned with an outbound interface displayed as an IP address representremote MAC addresses learned through the VXLAN tunnel.

StatementDis also correct. The MAC address5489-9893-48a3is learned from the local physical subinterfaceGE1/0/1.10, which belongs toBD 10, confirming local access.

StatementBis incorrect. Even though5489-982d-77e2is associated withGE1/0/1.20 (BD 20), hosts inBD 20 and BD 10 cannot communicate directly at Layer 2because they belong to different bridge domains.

Therefore, the correct answers areA, C, and D.

Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:

In campus networks, devices such as servers, print servers, and video surveillance systems requirestable and predictable IP addressesto ensure reliable access, simplified maintenance, and consistent policy enforcement. While fully dynamic DHCP allocation is easy to deploy, it does not guarantee IP address consistency, which complicates device management, monitoring, and troubleshooting.

Huawei campus network design best practices recommendstatic address allocation through DHCP based on MAC addresses, also known as DHCP reservation or static binding. With this approach, the DHCP server assigns a fixed IP address to a device according to its MAC address. This method combines the advantages of centralized DHCP management with the stability of static IP addresses.

PPPoE address binding is typically used in broadband access scenarios and is unsuitable for enterprise campus devices. The BOOT protocol is obsolete and not used in modern campus networks. Pure dynamic DHCP allocation does not meet the stability requirements of infrastructure and service devices.

According to HCIP Datacom Campus Network documentation, MAC-based DHCP static allocation is the recommended solution for managing critical campus devices, making option D correct.