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NEW QUESTION # 77
In thefirewall hot standby scenario, in which of the following conditions will the local deviceproactively send VGMP packets?
- A. Hot standby being enabled
- B. Hot standby being disabled
- C. Priority increase
- D. Link detection packet timeout
Answer: A
Explanation:
Comprehensive and Detailed Explanation:
VGMP (Virtual Group Management Protocol)is used inHuawei firewallsforhot standby and high availability.
When is VGMP Activated?#Whenhot standby is enabled, firewalls must synchronize their states to maintain failover capability.##VGMPsends packets periodicallyto check if the standby firewall is operational.
Why Other Options Are Incorrect?#Priority increase (B):Does not trigger VGMP packets directly.#Link detection timeout (C):Affects failover but does not initiate VGMP packets.#Hot standby being disabled (A):
Disables VGMP, preventing packets from being sent.
Thus, the correct answer isD.
#Reference:Huawei HCIE Datacom - Firewall Hot Standby and VGMP
NEW QUESTION # 78
In the laboratory network, the network is built according to the following topology diagram, SWI is the default configuration, and SW2 disables the switch STP function.
- A. SWI's G0/0/1 enters the Discarding state
- B. No interface is backed up for blocking
- C. SW2 G0/0/2 enters discarding state
- D. SW2 and G0/0/1 enters the Discarding state
- E. SG0/0/2 for WI enters the Discarding state
Answer: B
NEW QUESTION # 79
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, run the command on the VTEP to view BGP EVPN routes. The route entries shown in the following figure are displayed. Which of the following statements about these routing entries are correct?
Network (EthTagId/IP Prefix/IP PrefixLen)
NextHop
*>i 0:172.16.2.0:24 1.1.1.2
*>i 0:172.16.13.0:24 1.1.1.2
*>i 0:192.168.122.0:30 1.1.1.2
- A. These routes carry the L2VNI.
- B. These routes are Type 5 routes and carry network segment or mask information.
- C. These routes carry the L3VNI.
- D. These routes are Type 2 routes and carry host IP addresses.
Answer: B,C
Explanation:
Understanding BGP EVPN Route Types for VXLAN
#BGP EVPN (Ethernet VPN) is used for VXLAN control-plane learning.
#EVPN Type 2 Route (MAC/IP Advertisement)
Carries:MAC + Host IP
Used for:L2 forwarding, Host Mobility
#EVPN Type 5 Route (IP Prefix Advertisement)
Carries:Network segment (Subnet) + Prefix
Used for:VXLAN L3 routing
#What Do the Given Route Entries Show?
0:172.16.2.0/24
0:172.16.13.0/24
0:192.168.122.0/30
#These are IPv4 Subnets, NOT individual MACs.
#Since they carry IP Prefixes, they belong to EVPN Type 5.
Analysis of the Answer Choices:
#A. These routes are Type 5 routes and carry network segment or mask information.
Correct:The displayed routescarry network prefixes, which belong toEVPN Type 5.
#B. These routes are Type 2 routes and carry host IP addresses.
Incorrect:Type 2 routescarry MAC + Host IP, NOT full subnets.
#C. These routes carry the L2VNI.
Incorrect:L2VNI is forLayer 2 VXLAN bridging, but these areIP Prefix Routes (L3 routing).
#D. These routes carry the L3VNI.
Correct:Type 5 routes are used forVXLAN L3 routing, which means they belong toL3VNI.
Real-World Application:
VXLAN L3 Gateways:Type 5 routes enabledistributed routing between VXLAN segments.
Data Center Networks:Used tointerconnect virtual machines (VMs) across different subnets.
#Reference:Huawei HCIE-Datacom Guide - BGP EVPN & VXLAN L3 Routing
NEW QUESTION # 80
IGMP SSMMapping is bound to multicast through a static multicast source, so that members of IGMPv1 and IGMP2 can also access the SSM multicast network. The following statement about IGMPSSMMapping is wrong?( Radio).
- A. IGMP SSM Mapping does not process reporting messages from IGMPv3 In order to ensure that the same network segment runs any version
- B. IGMP hosts can make SSM services run IGMPv3 on the multicast router socket connected to the network segment where the member host is located
- C. The multicast address of the SSM is 23
- D. If the IGMP SSM Mapping feature is not enabled, neither IGMPv1 nor IGMPv2 supports multicast for deploying SSM modules
Answer: A
NEW QUESTION # 81
Which of the following statements about IPSG is incorrect?
- A. IPSG can be used to prevent hosts from changing IP addresses.
- B. IPSG is a source IP address filtering technology based on Layer 3 interfaces.
- C. IPSG can be used to check the validity of IP packets. If IP packets are invalid, the device reports an alarm to an NMS.
- D. IPSG can defend against IP address spoofing attacks.
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
IP Source Guard (IPSG) is a Layer 3 security feature used to protect against IP address spoofing by filtering packets based on bound IP-MAC mappings.
* Correct Statements:# IPSG is a Layer 3 filtering mechanism that checks if the source IP address of a packet matches the learned or configured bindings (Option B).# IPSG prevents unauthorized IP address changes by enforcing binding rules (Option C).# IPSG defends against IP spoofing attacks by dropping packets from unauthorized sources (Option D).
* Incorrect Statement:# Option A is incorrect because IPSG does not send alarms to an NMS when an invalid packet is detected. Instead, it drops the packet.
Thus, the correct answer is A.
# Reference: Huawei HCIE Datacom Security Guide - IP Source Guard (IPSG)
NEW QUESTION # 82
In the Huawei CloudCampus Solution, which of the following devices can go online through the registration query center?
- A. AP
- B. AR
- C. Switch
- D. Firewall
Answer: A,B,C,D
Explanation:
Comprehensive and Detailed Explanation:
The Huawei Registration Query Center allows devices to register and go online automatically in a cloud- managed environment.
# Supported Devices:
* Switches #
* Access Routers (AR) #
* Access Points (APs) #
* Firewalls #
# How It Works:
* Devices obtain their registration information via DHCP Option 148 or pre-configured credentials.
* The devices then connect to the registration query center to retrieve configuration and authentication details.
* Once authenticated, they go online and become manageable via iMaster NCE-Campus.
# Reference: Huawei HCIE Datacom - CloudCampus Device Registration
NEW QUESTION # 83
What is correct about the multicast message forwarding?
- A. The source address of the multicast message is the unicast address
- B. IGMP snooping function can not control the range of multicast traffic in the Ethernet flood
- C. In the multicast transmission mode, the destination address of the message can specify the location of the receiver
- D. RPF check failure indicates that the multicast data packets are received from a suboptimal interface, but the interface still receives multicast traffic and forwards it downstream
Answer: A
NEW QUESTION # 84
In addition to indicating priority, the DSCP value can also indicate the drop probability. Which of the following DSCP values is set with the highest drop probability?
- A. AF12
- B. AF11
- C. AF10
- D. AF43
Answer: D
Explanation:
Understanding DSCP & Assured Forwarding (AF) Classes
* DSCP (Differentiated Services Code Point) is used for QoS (Quality of Service) classification in IP packet headers.
* Assured Forwarding (AF) classes provide four traffic classes (AF1x, AF2x, AF3x, AF4x).
* Each AF class has three drop precedence levels (Low = 1, Medium = 2, High = 3).
A screenshot of a computer AI-generated content may be incorrect.
Analysis of Options:
* AF43 (Answer A) # Class 4, High Drop (Highest priority, highest drop probability) #
* AF10 (Answer B) # Class 1, Low Drop (Lowest priority, lowest drop probability) #
* AF12 (Answer C) # Class 1, Medium Drop Probability #
* AF11 (Answer D) # Class 1, Low Drop Probability #
Why AF43?
* Highest priority traffic within AF Class 4.
* Highest drop probability (x3) means packets are dropped first under congestion.
* Used for premium but non-essential services (e.g., bulk data transfer, backups).
# Reference: Huawei HCIE-Datacom Guide - QoS & DSCP Marking
NEW QUESTION # 85
According to the following information displayed on a router, which of the following are the causes of the failure in establishing an OSPF adjacency relationship?
OSPF error statistics:
* 1: Hello timer mismatch
* 0: Netmask mismatch
* 0: Bad checksum
* 0: Bad authentication type
* 0: Unknown neighbor
* 0: Extern option mismatch
- A. The area IDs are inconsistent.
- B. The IP address masks of the interfaces are inconsistent.
- C. Hello packets are sent at different intervals.
- D. The area types are inconsistent.
Answer: A,C
Explanation:
Comprehensive and Detailed Explanation:
The OSPF error output shows:# Hello timer mismatch (1 error) # Hello intervals must match for adjacency formation (A) ## No Netmask mismatch errors # Subnet masks are consistent, so option C is incorrect ## No Extern option mismatch # No evidence of area type inconsistency (option D) ## If area IDs were mismatched, adjacency would not form (option B is correct) # Thus, the correct answers are A and B.
# Reference: Huawei HCIE Datacom - OSPF Troubleshooting
NEW QUESTION # 86
Which of the following statements regarding RT are correct?
- A. The RT value is advertised to neighbors through the BGP extended community attribute in Update messages.
- B. Export Target and Import Target are independent of each other and support multiple values to implement flexible VPN routing information advertisement and reception control.
- C. RTs are classified into two types: Export Target and Import Target.
- D. Each VPN instance is associated with one or more pairs of VPN Target attributes, used to control VPN routing information advertisement and reception between sites.
Answer: A,B,C,D
Explanation:
Route Target (RT) is a BGP extended community attribute used in MPLS Layer 3 VPNs (L3VPNs) to control the import and export of VPN routes between different VPN instances (VRFs).
Explanation of Correct Answers:
# A. Each VPN instance is associated with one or more pairs of VPN Target attributes, used to control VPN routing information advertisement and reception between sites.
* Each VRF (VPN Routing and Forwarding instance) has an associated RT that determines which routes are imported and exported between VPNs.
* RTs enable inter-VPN communication while maintaining separation between VPN customers.
# B. Export Target and Import Target are independent of each other and support multiple values to implement flexible VPN routing information advertisement and reception control.
* The Export RT specifies which routes should be advertised.
* The Import RT specifies which routes should be accepted into a VRF.
* These can be configured independently to control traffic flow between VPNs.
# C. RTs are classified into two types: Export Target and Import Target.
* Export Target: Defines which VPN routes are advertised.
* Import Target: Defines which VPN routes are accepted.
* A VPN instance can have multiple RTs to allow flexibility.
# D. The RT value is advertised to neighbors through the BGP extended community attribute in Update messages.
* RTs are carried in BGP UPDATE messages as part of the BGP extended community attribute, enabling VPN route exchange between PEs.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei MPLS VPN Configuration Guide - Route Target (RT) Concepts
* HCIE-Datacom Study Material - BGP Route Advertisement in MPLS VPNs
NEW QUESTION # 87
Which of the following roles is NOT a core role in Huawei's Free Mobility solution?
- A. Policy enforcement device
- B. Authentication device
- C. Policy control device
- D. iMaster NCE-Campus
Answer: B
Explanation:
Understanding Huawei's Free Mobility Solution
Huawei's Free Mobility solution is designed to ensure that users can seamlessly access the network regardless of their physical location while maintaining consistent policies.
# Key Components in Free Mobility Solution:1## iMaster NCE-Campus (Answer A - Core Role)
* Manages network policies & user access.
* Implements centralized policy control & orchestration.
2## Policy Enforcement Device (Answer B - Core Role)
* Ensures that user policies (such as QoS, security, VLANs) are applied dynamically.
* Typically a switch or gateway enforcing access control.
3## Policy Control Device (Answer D - Core Role)
* Stores and dynamically assigns policies based on user role & device type.
* Works closely with iMaster NCE-Campus.
# Why is C (Authentication Device) NOT a Core Role?# Authentication devices (such as a RADIUS or AAA server) are not a core component of Huawei's Free Mobility solution.
* They are part of the broader network security framework but not mandatory for Free Mobility.
Real-World Application:
* Used in enterprise & campus networks where employees, guests, and IoT devices need seamless access while maintaining security policies.
# Reference: Huawei HCIE-Datacom Guide - Free Mobility Architecture & Policy Management
NEW QUESTION # 88
The duplicate address detection feature for NDP in the following description is incorrect?
- A. IPv6 duplicate address detection technology is similar to free ARP in IPv4
- B. The interface needs to perform duplicate address detection before enabling any of the unicast IPv6 addresses
- C. Duplicate address detection is implemented via RS and RA messages
- D. IPv6 unicast address is called a tentative address after it is assigned to an interface and before it is detected by duplicate addresses
Answer: C
NEW QUESTION # 89
By default, which of the following security MAC address types lose table entries after the device restarts?
- A. Sticty MAC address
- B. Secure dynamic MAC address
- C. Black hole MAC address
- D. Secure static MAC address
Answer: B
NEW QUESTION # 90
The IS-IS Level-1 neighbor relationship is not established between R3 and R4. Referring to the following information, what is the possible cause?
- A. The circuit types of the interfaces connecting R3 and R4 do not match.
- B. The area IDs of R3 and R4 are different.
- C. The IIH authentication between R3 and R1 fails.
- D. The IS-IS levels of R3 and R4 do not match.
Answer: B
Explanation:
From the IS-IS error output, the key error is:
Mismatched Area Addr(L1): 13
This clearly indicates that the area addresses are different, which prevents the Level-1 adjacency from forming.
Why is Option D Correct?
* IS-IS Level-1 routers must have the same area ID to form an adjacency.
* Since the log shows a mismatched area address, the adjacency fails at Level-1.
* If R3 and R4 were Level-2 routers, they could form an adjacency even with different area IDs.
Why Are the Other Options Incorrect?
# Option A: No authentication failure is reported.# Option B: No "Mismatched Level" errors appear, so their levels are compatible.# Option C: No "Bad Circuit Type" errors indicate mismatched circuit types.
Thus, the correct answer is D.
# Reference: Huawei HCIE Datacom - IS-IS Neighbor Troubleshooting
NEW QUESTION # 91
The following description of the Layer 6 functionality in the OSI reference model is correct?
- A. Synchronous communication
- B. Determines the availability of resources
- C. Provides a common data compression and encryption scheme
- D. Establishing, maintaining, and terminating communication sessions
Answer: C
NEW QUESTION # 92
If you delete a declared route entry on a BGP router, the BGP routing ring is triggered to send an Update message for route scattering, which carries the accepted mandatory attribute of the route entry that was discarded.
- A. False
- B. True
Answer: A
NEW QUESTION # 93
To allow only authorized users (users who obtain IP addresses through authorized DHCP servers or use specified static IP addresses) to access the network shown in the figure, which of the following solutions can be used?
- A. DAI + IPSG
- B. DHCP Snooping + DAI
- C. DAI + Port Security
- D. DHCP Snooping + IPSG
Answer: D
Explanation:
Understanding Network Security for Authorized User Access
# Problem Scenario:
* Only authorized users should be allowed network access.
* Users can obtain IP addresses either via DHCP or a predefined static IP list.
* Unauthorized users (e.g., attackers using rogue DHCP servers or spoofed IPs) must be blocked.
# Required Technologies for Securing Access:1## DHCP Snooping - Protects against rogue DHCP servers and builds a binding table of legitimate DHCP clients.2## IP Source Guard (IPSG) - Ensures that only authorized IP-MAC bindings can send traffic.
Analysis of the Answer Choices:
# A. DAI + Port Security (Incorrect)
* DAI (Dynamic ARP Inspection) prevents ARP spoofing but does not validate IP-MAC-DHCP bindings.
* Port Security only limits MAC addresses per port but does not verify IP addresses.
* Does NOT protect against unauthorized static IP users.
# B. DHCP Snooping + IPSG (Correct)
* DHCP Snooping:
* Prevents rogue DHCP servers from assigning unauthorized IPs.
* Builds a DHCP binding table (IP-MAC-Port).
* IP Source Guard (IPSG):
* Blocks traffic from IPs not listed in the DHCP snooping binding table.
* Can be configured to allow manually specified static IP addresses.
* Best choice to allow only authorized users (both DHCP and static IP users).
# C. DHCP Snooping + DAI (Incorrect)
* DAI (Dynamic ARP Inspection) prevents ARP spoofing but does not block unauthorized static IP users.
* Lacks IP-level access control needed to enforce static IP policies.
# D. DAI + IPSG (Incorrect)
* IPSG (IP Source Guard) needs DHCP Snooping to build the binding table.
* Without DHCP Snooping, IPSG cannot function properly.
* DAI does not provide complete protection against unauthorized users.
Why is the Answer B (DHCP Snooping + IPSG)?
# Ensures only users assigned a DHCP IP (or authorized static IPs) can send traffic.# Blocks rogue DHCP servers and unauthorized static IP users.
Real-World Application:
* Enterprise Networks: Prevents unauthorized static IP users or attackers from accessing VLANs.
* Public Wi-Fi Security: Ensures only authorized users receive IPs and can send traffic.
# Reference: Huawei HCIE-Datacom Guide - DHCP Snooping and IPSG Security Mechanisms
NEW QUESTION # 94
Which of the following is the purpose of configuring IS-IS fragmentation on an IS-IS device?
- A. Disable the device from establishing IS-IS neighbor relationships.
- B. Enable the device to support more IS-IS routes.
- C. There is no practical purpose.
- D. Disable the device from learning IS-IS link-state information.
Answer: B
Explanation:
* IS-IS (Intermediate System to Intermediate System) protocol has a limit on the size of Link-State PDUs (LSPs).
* Why Fragmentation?
* LSPs contain routing and topology information.
* If the LSP exceeds the maximum size, fragmentation allows the device to store and forward more routes by breaking them into smaller LSPs.
* Key Point: IS-IS fragmentation is essential in large-scale networks where routing tables grow beyond the default LSP size limit.
# Reference: Huawei HCIE-Datacom Guide - IS-IS Protocol and Route Scaling
NEW QUESTION # 95
In a VXLAN scenario, which of the following features can be enabled to reduce ARP packet flooding between VTEPs?
- A. Local proxy ARP
- B. Port isolation
- C. ARP broadcast suppression
- D. Host information collection
Answer: A,C,D
Explanation:
VXLAN networks suffer from ARP flooding because ARP requests are broadcasted across all VTEPs in a Layer 2 domain. To reduce ARP flooding, the following mechanisms can be enabled:
# A. Local Proxy ARP
* Allows the local VTEP to respond to ARP requests without forwarding them across the VXLAN network.
* The VTEP caches MAC-IP mappings and replies directly to ARP requests, reducing unnecessary flooding.
# B. ARP Broadcast Suppression
* Converts ARP broadcast packets into unicast or multicast packets to minimize network-wide flooding.
# C. Host Information Collection
* Collects and stores MAC-IP bindings of endpoints, which can be used by proxy ARP to reduce flooding.
# D. Port Isolation
* Port isolation prevents communication between devices within the same VLAN but does not help reduce ARP flooding between VTEPs.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei VXLAN Configuration Guide - ARP Optimization Techniques
* HCIE-Datacom Training Material - Reducing ARP Broadcasts in VXLAN Networks
NEW QUESTION # 96
In the Huawei SD-WAN Solution, which of the following routing protocols is used to advertise VPN routes between CPEs?
- A. RIP
- B. OSPF
- C. BGP
- D. IS-IS
Answer: C
Explanation:
BGP in Huawei SD-WAN
Huawei SD-WAN uses BGP (Border Gateway Protocol) as the primary routing protocol to exchange VPN routes between Customer Premises Equipment (CPEs) and the controller.
# Why BGP is Used in SD-WAN?
* Scalability: BGP can handle a large number of VPN routes.
* Policy-Based Routing: BGP allows traffic engineering and policy control across SD-WAN tunnels.
* Multiprotocol Support: Huawei SD-WAN uses MP-BGP to exchange IPv4, IPv6, and VPNv4 routes.
NEW QUESTION # 97
Class IP address range 239000-239255255,What does 255 do? Radio
- A. Any legitimate multicast traffic and multicast application can adopt this address
- B. Link-local multicast address, where traffic that uses that address includes network control messages and that address range is only the multicast address segment used by the routing protocol
- C. Locally managed multicast address, which is valid only locally
- D. SSM multicast address, the multicast address segment is valid for the whole network
Answer: C
NEW QUESTION # 98
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