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| Section | Weight | Objectives |
|---|---|---|
| Bearer WAN Planning and Deployment | 15% | - High-level Technology Deployment
|
| Advanced Routing and Switching Technologies | 37% | - Network Quality and Optimization
|
| Network Automation Technologies and Practice | 17% | - Automation Foundation
|
| WAN Interconnection Network Planning and Deployment | 8% | - WAN Service Optimization
|
| Campus Network Planning and Deployment | 23% | - Campus Network Architecture Design
|
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NEW QUESTION # 240
During the evolution from OSPFv2 to OSPFv3, LSA formats and functions remain unchanged, except that the network layer addresses in LSAs are changed from IPv4 to IPv6.
Answer: A
Explanation:
OSPFv3 (for IPv6) introduces significant changescompared toOSPFv2 (for IPv4).
While both versions share similarrouting mechanisms, there are keyLSA format and functional differencesbeyond just address changes.
Major Differences Between OSPFv2 and OSPFv3:
Address Independence (LSA Format Changes)
OSPFv3 LSAs do not contain IP addresses directly; they rely onLink-LSA and Intra-Area Prefix LSAto advertise addresses.
InOSPFv2, IP addresses were included in LSA headers.
New LSA Types in OSPFv3
LSA Type 8 (Link-LSA): Advertises a router's IPv6 address to neighbors.
LSA Type 9 (Intra-Area Prefix LSA): Replaces the address information in Router-LSAs and Network-LSAs.
Support for Multiple Address Families (AF)
OSPFv3 can supportboth IPv4 and IPv6in newer implementations (RFC 5838).
Authentication Mechanism Removed
OSPFv3 relies on IPsec for authentication, whereas OSPFv2 hadbuilt-in authentication mechanisms.
Incorrect Statement Explanation:
#The statement"LSA formats and functions remain unchanged"isfalsebecause:
LSA structures were modifiedin OSPFv3.
New LSA types were introducedto handle IPv6 addresses separately.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPFv3 Configuration Guide - LSA Differences from OSPFv2
HCIE-Datacom Study Material - OSPFv3 Evolution & IPv6 Implementation
NEW QUESTION # 241
In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?
Answer: A
NEW QUESTION # 242
The multicast IP address is 2291301301, and its corresponding MAC address is :(Multilist)
Answer: A
NEW QUESTION # 243
Which of the following fields is added to BGP4+ Update packets to advertise IPv6 routes?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
BGP4+ (BGP for IPv6) uses theMP_REACH_NLRI(Multiprotocol Reachable Network Layer Reachability Information) attribute to advertise IPv6 routes. This attribute is part of BGP ' s multiprotocol extensions (RFC
2858), allowing BGP to support multiple address families, including IPv6.
MP_REACH_NLRI:Advertises reachable IPv6 prefixes along with next-hop information.
MP_UNREACH_NLRI:Used to withdraw previously advertised IPv6 routes.
Since IPv6 addresses are significantly different from IPv4 addresses in structure and length (128 bits), the traditional BGP update message format (which supports only IPv4) is insufficient.
TheMP_REACH_NLRIattribute solves this by carrying IPv6-specific information.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei BGP Configuration and Implementation Guide
RFC 2858: Multiprotocol Extensions for BGP-4
NEW QUESTION # 244
If the number of MAC addresses learned on an interface enabled with port security reaches the upper limit, which of the following actions may the switch take?
Answer: A
NEW QUESTION # 245
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