H12-841_V1.5 Exam Dumps - HCIP-Datacom-Campus Network Planning and Deployment V1.5

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

In anasymmetric IRB (Integrated Routing and Bridging)VXLAN forwarding model, Layer 2 forwarding and Layer 3 routing occur ondifferent VTEPs. When PC1 sends traffic to PC2, the packet is first forwarded to thelocal gateway (VBDIF interface)on VTEP1 for Layer 3 routing.

After routing is performed, VTEP1 encapsulates the packet into a VXLAN packet and forwards it to VTEP2. Importantly, theoriginal data frame inside the VXLAN packethas already been rewritten after routing. The destination MAC address in the original Ethernet frame is no longer the MAC address of PC2, but theMAC address of the next-hop gateway on the remote VTEP.

In the figure, this next-hop MAC address isMAC C, which belongs to the VBDIF interface on VTEP2. MAC D (PC2’s MAC address) is only used after the packet is decapsulated and forwarded locally by VTEP2.

According to HCIP Datacom Campus Network VXLAN forwarding behavior, the correct destination MAC address of the original data frame sent from VTEP1 to VTEP2 isMAC C, making optionCcorrect.

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 IPsec VPN deployment, NAT traversal (NAT-T) is a critical mechanism used when one or both IPsec gateways are located behind a NAT device. Traditional ESP packets use IP protocol number 50 and do not contain TCP or UDP port numbers, which causes problems for NAT devices that rely on port information to maintain session mappings. As a result, ESP packets may be dropped by the NAT device.

During IKE negotiation, the two gateways detect whether a NAT device exists between them by exchanging NAT-detection payloads. If NAT is detected,NAT traversal is automatically enabled. When NAT-T is active, ESP packets are encapsulated insideUDP packetsso that they can traverse the NAT device successfully.

According to HCIP Datacom Campus Network security documentation, when ESP is encapsulated using NAT-T,both the source and destination UDP port numbers are set to 4500. UDP port 4500 is the standardized port reserved specifically for IPsec NAT traversal. This allows NAT devices to correctly track sessions and forward packets based on UDP port information.

Initially, IKE negotiations use UDP port 500. After NAT detection and NAT-T activation, subsequent IKE and ESP traffic switches toUDP port 4500. This encapsulation ensures compatibility with NAT environments while maintaining IPsec security.

Therefore, the correct value that enables ESP packets to pass through NAT devices is4500, which is a key operational detail in secure campus network VPN deployments.

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.

DHCP is a core protocol used in campus networks to automatically assign IP addresses and deliver network parameters to hosts, improving deployment efficiency and simplifying address management. DHCP messages include several fixed fields and anOptions field, which plays a critical role in parameter delivery.

Option A isfalse. Even if only gateway and DNS server information needs to be delivered to a client, the DHCP Offer messagemust carry the Options field. Default gateway and DNS server information are delivered through specific DHCP options, such as Option 3 (Router) and Option 6 (DNS Server). Without the Options field, these parameters cannot be conveyed to the client.

Option B is correct. The Options field in DHCP messages uses aTLV (Type-Length-Value)format, allowing flexible extension and supporting various network parameters, including NTP server addresses, wireless AC addresses, and log server addresses, which aligns with HCIP Datacom Campus Network descriptions.

Option C is also correct. DHCP supportsstatic IP address allocationby binding a specific IP address to a client’s MAC address. This is commonly used for printers, servers, or network devices that require fixed IP addresses.

Option D is correct as well. Because DHCP uses broadcast messages that cannot cross Layer 3 boundaries, aDHCP relay agentis required when the client and server reside on different IP networks.

Therefore, option A is the only incorrect statement.