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| Section | Weight | Objectives |
|---|---|---|
| Bearer WAN Planning and Deployment | 15% | - Traffic Engineering
|
| Advanced Routing and Switching Technology | 37% | - IS-IS
|
| Network Automation | 17% | - iMaster NCE
|
| WAN Interconnection Network Planning and Deployment | 8% | - Inter-AS VPN
|
| Campus Network Planning and Deployment | 23% | - Underlay Network
|
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NEW QUESTION # 27
Which of the following statements about 802.1X authentication are correct?
Answer: A,B,C,D
Explanation:
802.1X Authentication Overview
802.1X is a port-based authentication mechanism used for secure network access control. It involves:
* EAPoL (Extensible Authentication Protocol over LAN) communication between the client (supplicant) and the switch (authenticator).
* RADIUS communication between the authenticator and the authentication server (AAA server).
# A. 802.1X authentication uses EAPoL to exchange authentication information.
* EAPoL (Extensible Authentication Protocol over LAN) is used to send authentication packets over Ethernet (IEEE 802.3) networks.
# B. In EAP termination mode, the network device terminates EAP packets and re-encapsulates them into RADIUS.
* The switch acts as an authentication proxy by terminating EAP sessions and converting authentication information into RADIUS format.
# C. EAPoL is for wired (802.3), EAPoW is for wireless (802.11).
* EAPoL (EAP over LAN) is used in wired Ethernet networks.
* EAPoW (EAP over Wireless) is used in Wi-Fi (802.11) networks.
# D. In EAP relay mode, EAP packets are encapsulated into RADIUS using EAPoR (EAP over RADIUS).
* The switch does not terminate the EAP session but instead forwards EAP messages to the AAA server inside RADIUS packets.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei 802.1X Configuration Guide - EAPoL, EAPoW, and EAPoR
* HCIE-Datacom Training Material - AAA Authentication Modes
NEW QUESTION # 28
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?
Answer: A
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 againstrogue DHCP serversand builds abinding table of legitimate DHCP clients.
2##IP Source Guard (IPSG)- Ensures that onlyauthorized IP-MAC bindingscan send traffic.
Analysis of the Answer Choices:
#A. DAI + Port Security (Incorrect)
DAI (Dynamic ARP Inspection)prevents ARP spoofingbut doesnot validate IP-MAC-DHCP bindings.
Port Securityonlylimits MAC addresses per portbut doesnot verify IP addresses.
Does NOT protect against unauthorized static IP users.
#B. DHCP Snooping + IPSG (Correct)
DHCP Snooping:
Preventsrogue DHCP servers from assigning unauthorized IPs.
Builds aDHCP binding table(IP-MAC-Port).
IP Source Guard (IPSG):
Blocks trafficfrom 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 spoofingbutdoes not block unauthorized static IP users.
Lacks IP-level access controlneeded 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 unauthorizedstatic IP users or attackers from accessing VLANs.
Public Wi-Fi Security:Ensures onlyauthorized users receive IPs and can send traffic.
#Reference:Huawei HCIE-Datacom Guide - DHCP Snooping and IPSG Security Mechanisms
NEW QUESTION # 29
When an administrator configures VRRP, which of the following is not required?
Answer: A,C,D
NEW QUESTION # 30
Telemetry data must be encoded in GPB binary format. This format reduces the number of bytes in telemetry messages and improves the transmission efficiency compared with messages encoded in JSON format.
Answer: A
Explanation:
Understanding Telemetry Encoding Formats
# What is Telemetry?
* Telemetry is a real-time network monitoring method that provides high-frequency data collection.
* Used in AI-driven networks for predictive analytics and automation.
# Common Telemetry Encoding Formats:
# GPB (Google Protocol Buffers)
* Highly efficient binary format that reduces message size and CPU overhead.
* Commonly used for high-speed, real-time analytics.
# JSON (JavaScript Object Notation)
* Human-readable format, widely used in RESTful APIs.
* Less efficient than GPB in high-speed telemetry but easier to debug.
# Why is the Answer FALSE?# GPB is not mandatory; JSON can also be used in telemetry.# Huawei supports both GPB and JSON telemetry encoding formats.
Real-World Application:
* Cloud Networking: Uses GPB for fast data collection and JSON for API-based telemetry visualization.
* AI-Driven Networks: High-speed AI analytics leverage GPB encoding for efficiency.
# Reference: Huawei HCIE-Datacom Guide - Telemetry Encoding Formats and Data Collection
NEW QUESTION # 31
Telemetry is a technology that remotely collects data from physical or virtual devices at high speed, and has a layered protocol stack. Which of the following layers is not included in the telemetry protocol stack?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth
The telemetry protocol stack is structured as follows:
Communication layer (A): Manages data transmission between the telemetry client (device) and the server.
Transport layer (B): Uses protocols such as gRPC, HTTP/2, or TCP to transmit telemetry data.
Data encoding layer (C): Encodes data using formats like JSON, Protobuf, or XML.
The Data analysis layer (D) is not part of the telemetry protocol stack itself.
Data analysis typically occurs after the data has been collected and received on the server or collector.
Telemetry focuses on data collection, encoding, transport, and transmission, not on analysis.
Therefore, the correct answer is D.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Telemetry Configuration and Monitoring Guide
NEW QUESTION # 32
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