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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WAN Interconnection Network Planning and Deployment | 8% | - MPLS VPN
|
| Topic 2: Network Automation | 17% | - Automation Technologies
|
| Topic 3: Campus Network Planning and Deployment | 23% | - Network Services
|
| Topic 4: Advanced Routing and Switching Technology | 37% | - IS-IS
|
| Topic 5: Bearer WAN Planning and Deployment | 15% | - SR (Segment Routing)
|
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NEW QUESTION # 46
The following statement about the IS-IS protocol is incorrect?
Answer: A
NEW QUESTION # 47
Which of the following statements about BGP EVPN principles are correct in a scenario where a VXLAN tunnel is dynamically established through BGP EVPN?
Answer: A,B,C
Explanation:
BGP EVPN in VXLAN Tunneling
#A. MP_REACH_NLRI is used to carry routing information.
MP_REACH_NLRI (Multiprotocol Reachable Network Layer Reachability Information)is used inBGP updatesto carryVXLAN reachability information.
#B. Several BGP EVPN routes are defined through BGP extension.
BGP EVPN introduces multiple route types, such asType 2 (MAC/IP Advertisement), Type 3 (Inclusive Multicast), and Type 5 (IP Prefix Advertisement).
#D. MP_REACH_NLRI is used to carry the RT.
RT (Route Target) defines route import/export policies in VPN environments.
MP_REACH_NLRI carries the RT attributein BGP EVPN updates.
#C. MP_REACH_NLRI is used to carry the RD.
Wrong!TheRoute Distinguisher (RD)is carriedinside BGP attributes, but not in MP_REACH_NLRI.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN BGP EVPN Configuration Guide - BGP EVPN Route Types
HCIE-Datacom Training Material - VXLAN Dynamic Tunnel Establishment
NEW QUESTION # 48
MPLS supports both static and dynamic LSP establishment. Which of the following protocols cannot dynamically establish LSPs in MPLS TE scenarios? (Select all that apply)
Answer: A,B,C
Explanation:
InMPLS Traffic Engineering (TE),Label Switched Paths (LSPs)can be established:
Statically: Manual configuration.
Dynamically: Typically viaRSVP-TE.
Protocol roles:
RSVP-TE:Used to dynamically establish and signal TE LSPs##
OSPF / IS-IS: Act asIGP protocolsand provide TE-related link-state information (like bandwidth) butdo not establish LSPs themselves## BGP: Used forroute advertisement, not forLSP setupin MPLS TE ## Correct answers: A, C, D
NEW QUESTION # 49
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: B,C
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.
NEW QUESTION # 50
To prevent hackers from attacking user devices or networks using MAC addresses, you can configure MAC addresses of untrusted users as blackhole MAC addresses to filter out such invalid MAC addresses. When receiving a packet whose source or destination MAC address is a blackhole MAC address on a device, the device discards the packet.
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Blackhole MAC address configuration is a security feature that helps protect a network from MAC address spoofing or attacks involving untrusted MAC addresses. When you configure a MAC address as ablackhole MAC address, any packet received with that address as the source or destination will be immediately discarded by the device.
This feature is useful in scenarios where certain MAC addresses are identified as malicious or untrusted. By adding these MAC addresses to the blackhole list, the device effectively blocks communication involving these addresses, thereby mitigating security risks.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Ethernet Switching and Security Configuration Guide
NEW QUESTION # 51
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