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PDF Exam Material 2026 Realistic H12-841_V1.5 Dumps Questions
NEW QUESTION # 126
In Huawei's WAN solution, for "remote desktop (RDP/VDI) traffic transmitted across regions", which of the following technologies can "reduce screen stuttering and improve the smoothness of remote operation"?
- A. Remote desktop traffic QoS priority scheduling (set high priority) + screen compression optimization
- B. Only increase link bandwidth without optimizing the transmission mechanism.
- C. Lower the remote desktop resolution, sacrificing image quality for smoother performance.
- D. Directly transmit remote desktop traffic without optimization.
Answer: A
NEW QUESTION # 127
(Refer to the following figure.
Which of the following solutions can be used to prevent users from accessing the network using statically configured IP addresses?)
- A. DHCP Snooping + IPSG
- B. DAI + IPSG
- C. DHCP Snooping + DAI
- D. DAI + Port Security
Answer: A
Explanation:
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.
NEW QUESTION # 128
In Huawei's SD-WAN solution, which of the following technologies can "enable branch devices to establish IPsec VPN tunnels with headquarters in a NAT environment without manually configuring NAT mapping"?
- A. Disable the address translation function of the NAT device and communicate directly using the public IP address.
- B. Manually configure port forwarding on the NAT device to expose the public IP address of the branch device.
- C. SD-WAN NAT traversal technology (branch actively initiates tunnel connections to headquarters, traversing NAT)
- D. All branch devices use the same public IP address, and a tunnel is established through port multiplexing.
Answer: C
NEW QUESTION # 129
In a wide area network (WAN) OSPF deployment, when a non-backbone area (such as Area 1) is not directly connected to the backbone area (Area 0), which of the following technologies needs to be deployed to solve the routing connectivity problem?
- A. OSPF NSSA area
- B. OSPF route aggregation
- C. OSPF Virtual Link
- D. OSPF Certification
Answer: C
NEW QUESTION # 130
In Huawei's WAN solution, which of the following technologies can optimize the transmission experience of "cross-regional video conferencing" and reduce lag and latency? (Multiple choice)
- A. No traffic priority; video and regular data compete for bandwidth.
- B. Fixed video bitrate, not adjusted according to link status .
- C. Dynamic bandwidth adjustment (adjusting video bitrate based on link load)
- D. Video traffic priority scheduling (based on DSCP tag priority forwarding of video data packets)
- E. Edge node caching (caching video streams locally to reduce long-distance transmission latency)
Answer: C,D,E
NEW QUESTION # 131
In Huawei's SD-WAN solution, which of the following functions can "monitor the status of the VPN tunnel between branches and headquarters in real time (such as establishment/disconnection, encryption algorithm)"?
- A. Equipment hardware resource monitoring
- B. Link Quality Probe (LQM)
- C. Service Traffic Bandwidth Statistics
- D. VPN Tunnel Status Monitoring and Alerts
Answer: D
NEW QUESTION # 132
In Huawei's WAN solution, for scenarios where " intermittent packet loss occurs in the WAN link," which of the following technologies can "ensure the reliability of data transmission through a retransmission mechanism"?
- A. TCP-based retransmission mechanism (automatic retransmission of lost data packets)
- B. Reduce the transmission rate to forcibly reduce the probability of packet loss.
- C. Ignoring packet loss and not performing any retransmission processing leads to data loss.
- D. Relies solely on link-layer retransmissions, without handling network-layer packet loss.
Answer: A
NEW QUESTION # 133
In Huawei's WAN solution, which of the following technologies can "enable on-demand bandwidth expansion of WAN links and avoid resource waste"?
- A. Manually request capacity expansion only during peak business hours, and manually downgrade capacity after peak hours.
- B. Fixed bandwidth configuration, which will not be adjusted regardless of business needs.
- C. Configure maximum bandwidth; traffic exceeding this limit will be dropped.
- D. On-demand elastic bandwidth expansion technology (automatically increases/decreases bandwidth based on service traffic)
Answer: D
NEW QUESTION # 134
(What are the respective protocol numbers of AH and ESP?)
- A. 17 and 57
- B. 6 and 17
- C. 51 and 50
- D. 50 and 51
Answer: C
Explanation:
Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:
In IPsec, bothAuthentication Header (AH)andEncapsulating Security Payload (ESP)are implemented as IP protocols and are identified by specificIP protocol numbersin the IP header. These protocol numbers allow receiving devices to determine how the packet payload should be processed.
The protocol number assigned toAH is 51. AH provides data origin authentication, data integrity, and anti- replay protection but does not offer encryption. When an IP packet contains AH, the protocol field in the IP header is set to 51 so that the receiver can correctly process the AH header.
The protocol number assigned toESP is 50. ESP provides data confidentiality through encryption and can also provide integrity and authentication. Packets protected by ESP use protocol number 50 in the IP header.
The other options are incorrect because protocol number6represents TCP and17represents UDP, which are transport-layer protocols rather than IPsec protocols. Protocol number57is unrelated to IPsec.
According to HCIP Datacom Campus Network documentation and standard IP protocol assignments, the correct protocol numbers are AH = 51 and ESP = 50, making option B the correct answer.
NEW QUESTION # 135
In an MPLS VPN network, which of the following failures would cause "PE devices to be unable to advertise VPN routes to other PE devices"?
- A. OSPF neighbor between PE and CE is established normally.
- B. BGP VPNv4 address family is enabled on the PE device.
- C. BGP VPNv4 neighbors have not been established between PE devices.
- D. The MPLS protocol has been configured on the D.P device.
Answer: C
NEW QUESTION # 136
In Huawei's WAN bandwidth optimization solution, which of the following technologies can reduce link bandwidth usage and improve transmission efficiency? (Multiple choice)
- A. Deduplication (eliminating duplicate file blocks transmitted in the link)
- B. Data compression (such as the LZ77 algorithm for compressing duplicate data)
- C. Relying solely on increasing bandwidth capacity without optimizing traffic .
- D. Application-layer traffic optimization (e.g., HTTP caching, video traffic shaping)
- E. No compression or caching mechanism; raw data is transmitted directly.
Answer: A,B,D
NEW QUESTION # 137
In the WAN BGP protocol, if "EBGP neighbors are configured with MD5 key authentication, but the keys are inconsistent," which of the following problems will this cause?
- A. BGP neighbor relationships could not be established (authentication failed).
- B. BGP neighbor relationships are established normally, but routes cannot be transmitted.
- C. BGP neighbor relationships are established normally, and route transmission is unaffected.
- D. Automatically switches to unauthenticated mode, and neighbor relationships are established normally.
Answer: A
NEW QUESTION # 138
(As shown in the figure,
SW1 and SW2 use asymmetric IRB forwarding, and PC1 and PC2 communicate with each other. Which of the following is the destination MAC address of the original data frame in the packet sent from VTEP1 to VTEP2?)
- A. MAC C
- B. MAC A
- C. MAC D
- D. MAC B
Answer: D
Explanation:
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.
NEW QUESTION # 139
In Huawei's WAN bandwidth optimization solution, which of the following technologies can be used to optimize "HTTP/HTTPS services" and improve access speed? (Multiple choice)
- A. HTTPS traffic is not processed; all decryption is performed on the server side .
- B. No caching or compression, directly forwards HTTP/HTTPS traffic.
- C. HTTPS offloading (edge nodes perform HTTPS decryption, reducing server load)
- D. Dynamic content compression (compressing and transmitting HTTP response content)
- E. HTTP caching (edge node caching of static resources, such as images and CSS)
Answer: C,D,E
NEW QUESTION # 140
In Huawei's WAN bandwidth management solution, which of the following functions can "set bandwidth allocation for different service types (such as VoIP, video, and file transfer) (e.g., VoIP
20%, video 50%) to avoid single-service monopolizing bandwidth"?
- A. All services share bandwidth, with no percentage restrictions.
- B. Bandwidth allocation strategy based on service type
- C. Only VoIP service bandwidth is guaranteed; there is no limit on the proportion for other services.
- D. Shut down non-critical services and allow only core services to use bandwidth.
Answer: B
NEW QUESTION # 141
(The following figure shows the MAC address table of a Layer 2 VXLAN gateway. Which of the following statements are true?Choose all that apply.)
- A. Both 0000-0000-0010 and 5489-9893-48a3 belong to BD 10 and are in the same Layer 2 broadcast domain.
- B. The MAC address entry with the outbound interface 10.3.3.3 is learned from the remote VTEP through the VXLAN tunnel.
- C. The outbound interface corresponding to 5489-9893-48a3 is GE1/0/1.10, which belongs to BD 10.
- D. The outbound interface corresponding to 5489-982d-77e2 is GE1/0/1.20. Because this interface belongs to BD 20, the host with 5489-982d-77e2 can directly communicate with the host with 5489-9893-48a3 at Layer 2.
Answer: A,B,C
Explanation:
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 with BD 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 subinterface GE1/0/1.10, 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.
NEW QUESTION # 142
In an MPLS VPN network, which of the following descriptions does NOT conform to the normal logic of "VPN routing and forwarding"?
- A. PE devices transmit data packets carrying double tags via MPLS LSP.
- B. The data packets received by the CE device should be unlabeled IPv4/IPv6 data packets.
- C. After receiving the data packet, the remote PE device removes the public network label but retains the VPN label before forwarding it to the CE device.
- D. Data packets sent by the CE device first reach the PE device, where the PE device encapsulates a VPN label.
Answer: C
NEW QUESTION # 143
(Which of the following statements about authentication profile configuration is true?)
- A. When multiple access profiles are bound to an authentication profile, authentication is triggered in the following sequence: 802.1X authentication # Portal authentication # MAC address authentication.
- B. By default, users access the default domain, which cannot be modified using the CLI.
- C. If a forcible domain is configured for a user, the user is forcibly authenticated in the forcible domain regardless of whether the user name contains the domain name.
- D. On the same interface of the same device, all authentication types (such as Portal, MAC address, and
802.1X) must be configured with the same default domain or forcible domain.
Answer: C
Explanation:
Comprehensive and Detailed 200 to 250 words of Explanation From HCIP Datacom Campus Network documents knowledge without any URL or Links:
In Huawei campus authentication architecture, anauthentication profiledefines how users are authenticated and which domain is used during authentication. A key concept is theforcible domain, which has the highest priority during domain selection. If a forcible domain is configured, the device ignores any domain information carried in the user name and forcibly authenticates the user in the specified domain. Therefore, statementD is correct.
Statement A is incorrect because the default domaincan be modifiedusing CLI commands, allowing administrators to flexibly control user authentication behavior. Statement B is also incorrect; on the same interface, different authentication types (such as 802.1X, MAC authentication, and Portal)can be configured with different domains, depending on access control requirements.
Statement C is incorrect because the default authentication triggering sequence on Huawei devices is802.1X # MAC address authentication # Portal authentication, not the order described. This sequence ensures strong authentication is attempted first before falling back to weaker mechanisms.
According to HCIP Datacom Campus Network documentation, forcible domain configuration guarantees unified policy enforcement and simplifies authentication control, making option D the only correct statement.
NEW QUESTION # 144
In wide area network link load balancing scenarios, which of the following load sharing methods does Huawei SD-WAN solution typically employ?
- A. Allocate traffic based solely on link latency, ignoring bandwidth.
- B. Only use a single link, with other links used as cold backups.
- C. Randomly allocate traffic to any link
- D. Traffic sharing based on bandwidth ratio (e.g., 7:3 allocation)
Answer: D
NEW QUESTION # 145
Huawei's SD-WAN solution targets the scenario of "branch access to public cloud resources." Which of the following technologies can "reduce intermediate links, achieve direct connection between branches and cloud resources, and reduce latency"?
- A. All traffic is routed from headquarters to the cloud.
- B. Accessing the cloud using only an internet connection
- C. Manually configure a large number of static routes pointing to the cloud network segment.
- D. Deploy a dedicated cloud line to connect SD-WAN and the public cloud.
Answer: D
NEW QUESTION # 146
In Huawei's WAN bandwidth optimization solution, for HTTP/HTTPS services, which of the following technologies can "cachise static resources (such as images and CSS) at edge nodes to reduce duplicate transmissions"?
- A. HTTPS offloading technology
- B. Data encryption technology
- C. Dynamic content compression technology
- D. HTTP caching technology
Answer: D
NEW QUESTION # 147
Which of the following technologies can be used to isolate users in the same VLAN, enhance user communication security, and prevent invalid broadcast packets from affecting services?
- A. Super VLAN
- B. IPSG
- C. Ethernet port security
- D. Port isolation
Answer: D
NEW QUESTION # 148
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