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| Section | Objectives |
|---|---|
| Topic 1: Network Security and QoS | - QoS mechanisms
|
| Topic 2: WAN and VPN Technologies | - MPLS fundamentals
|
| Topic 3: IPv6 and Advanced IP Technologies | - IPv6 deployment
|
| Topic 4: Network Automation and Programmability | - SDN and automation
|
| Topic 5: Enterprise Network Architecture | - Network design principles
|
| Topic 6: Routing and Switching Technologies | - Switching technologies
|
| Topic 7: Data Center and Virtualization Technologies | - VXLAN and overlay networks
|
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NEW QUESTION # 151
IPsec uses an asymmetric encryption algorithm to encrypt the symmetric algorithm key, which it uses to encrypt/decrypt data, ensuring security and performance.
Answer: B
Explanation:
In IPsec, a symmetric encryption algorithm (e.g., AES) is used for encrypting data due to its speed. To securely exchange the symmetric key between peers, asymmetric encryption algorithms (like RSA) are used.
This method ensures:
High performance (due to fast symmetric encryption)
Secure key exchange (asymmetric protection)
Exact Extract - Huawei HCIE-Datacom Guide - IPsec Encryption:
"IPsec uses symmetric algorithms to encrypt data for performance and asymmetric algorithms to securely exchange symmetric keys during IKE negotiation." Reference:
Huawei HCIE-Datacom Study Guide - IPsec Encryption Principles
Huawei IPsec VPN Deployment Guide - IKE Phase 1 & 2
NEW QUESTION # 152
The NETCONF content layer contains device configuration data.
Which of the following statements are correct about the following NETCONF configuration?
<?xml version="1.0" encoding="UTF-8"?>
<rpc xmlns="urn:ietf:params:xrnl:ns:netconf:base:1.0" message-id="801">
<edit-config>
<target>
<running/>
</target>
<default-operation>merge</default-operation>
<error-option>rollback-on-error</error-option>
<config xmlns:xc="urn:ietf:params:xml:ns:netconf:base:1.0">
<vlan xmlns="http://www.huawei.com/netconf/vrp/huawei-vlan">
<vlans>
<vlan>
<vlanId>10</vlanId>
<protocolVlans>
<protocolVlan xc:operation="merge">
<protocolIndex>0</protocolIndex>
</protocolVlan>
</protocolVlans>
</vlan>
</vlans>
</vlan>
</config>
</edit-config>
</rpc>
Answer: A,B,D
Explanation:
Comprehensive and Detailed Explanation:
# Breakdown of the NETCONF Configuration:# (B) Huawei-YANG Model Used:
The namespace contains http://www.huawei.com/netconf/vrp/huawei-vlan, indicating Huawei's YANG model.# (C) VLAN 10 is Created: <vlanId>10</vlanId> confirms VLAN 10 is configured.
# (D) Merge Operation Used: The xc:operation="merge" tag ensures changes are merged rather than replacing the entire config.
# (A) Incorrect: The <edit-config> operation modifies the running configuration, not the startup configuration.
# Reference: Huawei HCIE Datacom - NETCONF Configuration Management
NEW QUESTION # 153
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following fields is not carried in BGP EVPN Type 2 routes?
Answer: B
Explanation:
BGP EVPN Route Types in VXLAN:
* BGP EVPN Type 2 Route (MAC/IP Advertisement Route)
* Used for host reachability advertisement.
* Carries MAC and IP address information of endpoints.
* Does not carry an IP Prefix field (Type 5 routes handle prefixes).
* Correct Explanation of Answer Choices:# IP Address (B) is included - Used for host mobility and reachability.# L3VNI (C) is included - Used for Layer 3 VXLAN routing.# L2VNI (D) is included - Used for Layer 2 VXLAN bridging.# IP Prefix (A) is not included in Type 2 routes - It is part of EVPN Type 5 routes for prefix advertisement.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei VXLAN BGP EVPN Configuration Guide - Type 2 vs. Type 5 Routes
* HCIE-Datacom Training Material - VXLAN Overlay Networks and BGP EVPN
NEW QUESTION # 154
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.
Answer: A
NEW QUESTION # 155
OSPF is deployed on a campus network to implement network interconnection. The LSDB of R2 is shown in the figure.
What can be determined from the LSDB?
Answer: C,D
Explanation:
To analyze this question, let's break down the key concepts and the given LSDB (Link State Database) information from the figure:
Understanding the LSDB Output:
The output shows the OSPF LSDB on R2 with Router ID 10.1.123.2.
Area 0.0.0.0 (Area 0) is displayed along with several Link State Advertisements (LSAs) including Router LSAs, Network LSAs, and Summary LSAs.
Area 0.0.0.1 (Area 1) also displays Router LSAs and a Type 7 LSA (NSSA LSA) with Link-State ID 0.0.0.0.
An External LSA (Type 5) with Link-State ID 0.0.0.0 and AdvRouter 10.1.123.2 is also present.
Analysis of Each Option:
Option A: Area 1 is an NSSA.
Correct.
The presence of a Type 7 LSA (NSSA LSA) in the database indicates that Area 1 is configured as an NSSA (Not-So-Stubby Area).
NSSA allows the injection of Type 7 LSAs for external routes while blocking Type 5 LSAs from entering the area.
Option B: R2 translates Type 7 default route into Type 5 default route.
Correct.
In an NSSA, if an ABR (like R2) has the NSSA ASBR capability, it will convert Type 7 LSAs to Type 5 LSAs before injecting them into the backbone area (Area 0).
In the LSDB, we see both a Type 7 LSA (NSSA) and a corresponding Type 5 External LSA, confirming that R2 performs this translation.
Option C: R2 advertises the default route in the OSPF process.
Incorrect.
There is no indication that R2 itself is originating the default route.
The Type 7 LSA in Area 1 and the Type 5 LSA in Area 0 only indicate translation from another source, not R2 advertising it directly.
Option D: Area 1 does not have Type 3 LSAs. The possible cause is that R2 filters Type 3 LSAs in the outbound direction of Area 1.
Incorrect.
In an NSSA area, Type 3 LSAs (Inter-Area Prefix LSAs) are typically not generated for external routes.
The absence of Type 3 LSAs in Area 1 is due to the nature of NSSA itself rather than any filtering configured on R2.
Reference:
Huawei HCIE-Datacom V1.0 Training Materials
Huawei Official Documentation: OSPF Configuration Guide
Huawei OSPFv3 Configuration Guide
RFC 3101 - The OSPF Not-So-Stubby Area (NSSA) Option
HCIE-Datacom Knowledge Base: OSPF Advanced Concepts
NEW QUESTION # 156
......
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