Free Huawei H12-891_V1.0 Practice Exam with Questions & Answers | Set: 8

Huawei’s NQA (Network Quality Analysis) provides tools to test and monitor network performance such as latency, jitter, and packet loss. The supported test types include:

ICMP — For reachability and round-trip time testing.

UDP, TCP, HTTP, FTP, etc.

DNS, VoIP, DHCP (limited to simulation, not monitoring protocol status itself)

Protocols like SNMP and OSPF are not directly monitored by NQA, as these are management or control plane protocols, not data-path or performance-measurable protocols.

Correct answer: C. ICMP

FEC (Forwarding Equivalence Class) in MPLS is a group of packets that are forwarded in the same manner. MPLS can classify packets into FECs based on factors such as:

Destination IP address

Source address

CoS (Class of Service)

Application type

However, Fragment Offset, which is part of the IP header used for IP fragmentation, is not used in FEC classification. Fragment offset is more relevant to how IP packets are reconstructed and not suitable or used as a classification standard for forwarding decisions in MPLS.

Exact Extract - Huawei HCIE-Datacom V1.0 MPLS Chapter:

“FEC classification may be based on various parameters including destination address, source address, and even CoS values. However, fragment offset is not used as an FEC criterion, as MPLS forwarding occurs before IP reassembly.”

Comprehensive and Detailed In-Depth Explanation:

When IS-IS is used as the IGP (Interior Gateway Protocol) to advertise Segment Routing (SR) SIDs, the Level-2 (L2) router advertises node SIDs globally across the entire IS-IS domain, not just within a single area.

Level-1 (L1) routers only advertise within the local area, but L2 routers distribute information across multiple areas, enabling inter-area reachability.

Therefore, the statement is FALSE.

Huawei AR routers used as egress gateways in CloudCampus solutions support multiple onboarding and deployment methods, including:

DHCP Option 148-based auto-deployment

Web-based management

CLI-based deployment and configuration (also supported)

So, the statement is incorrect—CLI-based deployment is supported.

Exact Extract - Huawei CloudCampus AR Router Deployment Guide:

“AR series routers support multiple deployment methods including CLI, DHCP Option 148, and web-based registration.”

Option A: Correct — both terminal and interface security are important.

Option C: Correct — CAPWAP supports DTLS encryption for secure tunnel communication.

Option D: Correct — intranet security design considers both wired and wireless.

Option B: Incorrect — traffic suppression (such as broadcast suppression) is implemented using rate limiting or storm control, not by shutting down interfaces. Shutting down interfaces would disrupt legitimate traffic too.

Correct answer: B

Understanding VXLAN and BGP EVPN Control Plane

VXLAN (Virtual eXtensible LAN) is an overlay network technology that enables Layer 2 (L2) extension over an IP-based network using MAC-in-UDP encapsulation.

???? Traditional VXLAN Flooding Issue:

Without BGP EVPN, VXLAN uses flood-and-learn behavior for MAC address learning.

Broadcast, Unknown Unicast, and Multicast (BUM) traffic is flooded to all VTEPs, which is inefficient.

???? How Does BGP EVPN Solve Flooding?

BGP EVPN (Ethernet VPN) replaces the flood-and-learn model with a distributed control plane.

MAC/IP bindings are advertised through BGP EVPN Type 2 routes, eliminating the need for flooding ARP requests.

VXLAN routers learn MAC addresses proactively instead of relying on flooding.

Why is the Answer TRUE?

✅ BGP EVPN fully prevents ARP flooding by distributing MAC/IP bindings via control plane updates.

✅ VTEPs only send traffic to known destinations, reducing network congestion.

✅ BGP EVPN is the industry standard for large-scale data center and campus VXLAN deployments.

Real-World Application:

Data Centers: Avoids unnecessary ARP request flooding in large cloud networks.

Campus Networks: Reduces L2 broadcast storms, improving network efficiency.

Service Provider Networks: Enables scalable multi-tenant VXLAN solutions.

✅ Reference: Huawei HCIE-Datacom Guide – VXLAN BGP EVPN Control Plane Architecture

✔ Egress devices in Huawei CloudCampus static IPsec VPN include:

Access Points (APs)

Routers

Firewalls ✅

✔ Why Firewalls?

Firewalls support IPsec VPN termination for secure WAN interconnection.

Firewalls provide advanced security filtering and encryption for IPsec traffic.

???? Reference: Huawei HCIE Datacom – IPsec VPN in CloudCampus

Comprehensive and Detailed Explanation:

✔ Huawei OPS (Open Programmability System) is a YANG-based network management system that uses RESTful APIs for configuring and managing devices.

✔ /ifm/interfaces/interface is the RESTful URI (Uniform Resource Identifier) that:

Represents an interface object in the network device.

Allows querying, configuring, and modifying network interfaces via API requests.

Since the statement is correct, the answer is TRUE.

???? Reference: Huawei HCIE Datacom – OPS API and Managed Objects

In Huawei ' s SRv6 instruction naming system, each letter keyword represents a specific forwarding behavior:

X (Cross): Forwards packets via specified Layer 3 interfaces → ✅

M (MAC): Searches Layer 2 forwarding table for broadcast/multicast, not unicast → ❌

V (VPN): Searches the VPN routing table (VRF) for forwarding → ✅

T (Table): Searches a specific routing table (e.g., user-defined) → ✅

Correct answers: A, C, D

Understanding Huawei OPS and HTTP Communication

???? What is Huawei OPS?

Huawei Open Programmability System (OPS) enables API-based network automation using standard HTTP requests.

It supports NETCONF, RESTCONF, and RESTful APIs for device management.

???? Why TCP Port 80?

Port 80 is the default port for HTTP traffic.

Used for web-based device management, API calls, and telemetry data exchange.

If HTTPS (secure version) is used, the default port is 443.

Why is the Answer 80?

✅ HTTP operates on TCP port 80 by default.

✅ Huawei OPS uses HTTP APIs to manage network devices, making port 80 the standard option.

Real-World Application:

Cloud-Native Network Automation: Uses HTTP-based APIs for SDN controllers and automation tools.

Network Device Management: Enables remote configuration and monitoring over HTTP APIs.

✅ Reference: Huawei HCIE-Datacom Guide – Open Programmability System (OPS) & HTTP Communication