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Huawei H12-831_V1.0-ENU certification exam is an important certification for networking professionals who wish to specialize in advanced routing and switching technologies. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification validates a candidate’s knowledge and skills in complex network design and implementation, which is essential for working with Huawei’s routing and switching products. Obtaining this certification provides a competitive edge in the job market and opens up opportunities for career advancement.
NEW QUESTION # 270
In order to protect the BGP protocol from attacks, MDS authentication can be used between BGP neighbors to reduce the possibility of attacks. The ID5 algorithm is simple to configure. After configuration, a single password is generated, and human intervention is required to change the password.
- A. True
- B. False
Answer: A
NEW QUESTION # 271
A network engineer of an enterprise wants to save IP addresses and isolate Layer 2 mutual access by deploying VLAN aggregation and MUX VLAN. In order to save VLAN resources, the engineer can set super VLAN and MUX VAN to the same VLANID.
- A. True
- B. False
Answer: B
NEW QUESTION # 272
In the network shown in the figure, R1, R2, R4, and R5 run IS-IS, and the area number is
49.0001. R3 and R6 run IS-IS, and the area number is 49.0002. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, where R2 and R5 are RRs and R1, R4, R3, and R6 are clients. R2 and R5 also establish an IBGP neighbor relationship and configure the same Cluster ID. IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through import. For 192.168.1.0/24, match based on the number of valid routes in the BGP routing table.
Answer:
Explanation:
NEW QUESTION # 273
To support the processing and calculation of IPv6 routes, IS-IS adds a new MLPID in TLV No.
129.
MLPID is an 8-bit field that identifies a network layer protocol message. Which of the following is the MLPID value for IPv6?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 274
An OSPF network experiences frequent topology changes, leading to excessive CPU usage due to repeated SPF calculations. Which Huawei feature can reduce CPU utilization?
- A. BGP add-path
- B. OSPF cost auto-adjust
- C. MED optimization
- D. Incremental SPF (iSPF)
Answer: D
NEW QUESTION # 275
The Route-LSA generated by a router is shown in the figure. Which of the following descriptions are correct? (Multiple choice)
- A. The router belongs to the stub area
- B. The router is the DR of the local link
- C. The router is an ABR
- D. Other routers can forward IPv6 traffic through this router
Answer: A,B,D
NEW QUESTION # 276
On the OSPFv3 network shown in the figure, area 1 is an NSSA. R1 imports the external route 2000::1/128 to OSPFv3. Which of the following LSAs are available in area 0?
- A. Link-LSA
- B. Intra-Area-Prefix-LSA
- C. Inter-Area-Prefix-LSA
- D. Inter-Area-Router-LSA
Answer: C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:To determine which LSAs are available in Area 0, we need to analyze the OSPFv3 network, the area types, and the behavior of external routes in an NSSA, considering the possibility of multiple correct answers. Let's break it down step by step:
* Understanding the Network and Area Types:
* The network has two areas: Area 0 (backbone area) and Area 1 (Not-So-Stubby Area or NSSA).
* R1, located in Area 1, imports an external IPv6 route (2000::1/128) into OSPFv3.
* Area 0 is the backbone area, and Area 1 is an NSSA, which allows limited external routes but has specific restrictions on LSA types.
* OSPFv3 LSA Types and Their Roles:
* Link-LSA (Type 8): These are link-local LSAs, flooded only within the local link and not propagated beyond the local segment. They are not flooded into Area 0 or other areas, so they are not relevant for inter-area or external route advertisement.
* Inter-Area-Router-LSA (Type 4): These LSAs are used to describe routers in other areas, specifically Autonomous System Boundary Routers (ASBRs) that originate external routes. In this case, R1 is an ASBR in Area 1 (NSSA) importing the external route 2000::1/128. Type 4 LSAs are generated by the ABR (e.g., R1 or another router connecting Area 1 to Area 0) and flooded into Area 0 to provide reachability information to the ASBR (R1) for the external route.
Therefore, Inter-Area-Router-LSAs can be present in Area 0 to help routers reach R1 as the ASBR.
* Intra-Area-Prefix-LSA (Type 9): These LSAs advertise prefixes associated with routers or transit networks within the same area. They are not used for external routes and are confined to Area 1, so they are not available in Area 0.
* Inter-Area-Prefix-LSA (Type 3): These LSAs advertise prefixes from one area to another, including routes summarized or redistributed into the OSPF domain. In an NSSA, external routes (like 2000::1/128) are advertised as Type 7 LSAs within Area 1. The ABR (e.g., R1 or another router) translates these Type 7 LSAs into Type 5 LSAs or, in OSPFv3, they may be represented as Inter-Area-Prefix-LSAs (Type 3) to flood the external route into Area 0. Thus, Inter-Area- Prefix-LSAs are available in Area 0 for the external route 2000::1/128.
* Behavior of External Routes in an NSSA:
* In OSPFv3, an NSSA (like Area 1) allows external routes to be imported by an ASBR (R1 in this case). NSSAs do not flood Type 5 LSAs (external LSAs) directly into the area. Instead, external routes are advertised as Type 7 LSAs within the NSSA.
* The Area Border Router (ABR) connecting the NSSA (Area 1) to the backbone (Area 0)-likely R1 or another router-translates the Type 7 LSAs into Type 5 LSAs (or, in OSPFv3, they may be represented as Inter-Area-Prefix-LSAs or other appropriate LSAs for external routes). These translated LSAs are then flooded into Area 0.
* Additionally, since R1 is an ASBR, Area 0 needs to know how to reach R1 to access the external route 2000::1/128. This is achieved through Inter-Area-Router-LSAs (Type 4), which are flooded into Area 0 by the ABR to describe the location of the ASBR (R1) in Area 1.
* Determining LSAs Available in Area 0:
* Link-LSA (Type 8): These are link-local and not flooded into Area 0, so they are not available in Area 0.
* Inter-Area-Router-LSA (Type 4): Since R1 is an ASBR in Area 1 (NSSA) importing the external route, the ABR (e.g., R1 or another router) generates Inter-Area-Router-LSAs to advertise R1's location to Area 0. This LSA is necessary for routers in Area 0 to reach the ASBR (R1) for the external route 2000::1/128. Therefore, Inter-Area-Router-LSAs are available in Area
0.
* Intra-Area-Prefix-LSA (Type 9): These are confined to Area 1 and not flooded into Area 0, so they are not available in Area 0.
* Inter-Area-Prefix-LSA (Type 3): This LSA is used to advertise the external prefix 2000::1/128 into Area 0 after translation from Type 7 LSAs in Area 1. Therefore, Inter-Area-Prefix-LSAs are available in Area 0.
* Conclusion:
* The external route 2000::1/128, imported by R1 in Area 1 (NSSA), results in both Inter-Area- Router-LSAs (Type 4) and Inter-Area-Prefix-LSAs (Type 3) being available in Area 0.
* Inter-Area-Router-LSA (Type 4) is present to describe the location of the ASBR (R1) in Area 1, allowing routers in Area 0 to reach R1 for the external route.
* Inter-Area-Prefix-LSA (Type 3) is present to advertise the external prefix 2000::1/128 into Area 0 after translation from the Type 7 LSA in Area 1.
* Therefore, the correct answers are B (Inter-Area-Router-LSA) and D (Inter-Area-Prefix-LSA).
References (Based on HCIP-Datacom-Advanced Routing & Switching Technology Concepts):
* OSPFv3 LSA Types: HCIP-Datacom documentation on OSPFv3 LSAs, including Link-LSA, Inter- Area-Router-LSA, Intra-Area-Prefix-LSA, and Inter-Area-Prefix-LSA (e.g., Section on OSPFv3 Fundamentals).
* NSSA Behavior in OSPFv3: HCIP-Datacom coverage of NSSA areas, Type 7 LSAs, and their translation to Type 5 or Inter-Area-Prefix-LSAs for Area 0, as well as Inter-Area-Router-LSAs for ASBR reachability (e.g., Chapter on OSPFv3 Advanced Features and Area Types).
* External Route Propagation: HCIP-Datacom explanation of external route handling in OSPFv3, including ASBR and ABR roles, and LSA types for inter-area and external route advertisement (e.g., Section on Route Redistribution and IPv6 OSPF).
NEW QUESTION # 277
In a BGP/MPLS IP VPN network, when a PE device advertises VPNv4 routes, which of the following information will it carry? (Multiple choice)
- A. RD
- B. Import Target
- C. IPv4 address prefix
- D. export Target
Answer: A,C,D
NEW QUESTION # 278
Link LSAs of OSPFv3 are propagated throughout the area.
- A. right
- B. wrong
Answer: B
NEW QUESTION # 279
As shown in the figure, a sham link is established between PE1 and PE2 through the LoopBackD interface. CE2 can learn the route to the 192.168.1.0/24 network segment (the direct route on CE1) through the sham link and backdoor link. If you keep the default configuration, the cost value of the route from CE2 to the 192.168.1.0/24 network segment should be (). (Please fill in the Arabic numerals directly, without symbols)
Answer:
Explanation:
4
NEW QUESTION # 280
When creating an IPv6 static route, for a broadcast type interface, you need to specify the next hop, and the next hop address can be a link-local address. When the next hop address is a link- local address, you must specify the outbound interface.
- A. True
- B. False
Answer: A
NEW QUESTION # 281
What is the default aging time of the MAC address table of Huawei switches in seconds?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 282
According to this picture, the door can be judged?
- A. system-IDforee8a0c2.baf2device whose type isLevel-1
- B. system-IDforee8c.a0c2.baf2device whose type isLevel-1-2
- C. R4belong only toLevel-1
- D. R4belong only toLevel-2
Answer: B,C
NEW QUESTION # 283
Part of the configuration of R1 is as follows. Which statement about IS-IS on R1 is correct?
3vpn-instarwce rr
level- 2
cost-style wide
-erntity 47.ccOa 3eft)btxlci-dael
- A. process2with process3The routing information is isolated
- B. process1Also contains global routing information. andVRFtt,rrrouting information
- C. process2with process3routing information will be shared
- D. process1Contains only global routing information
Answer: A,D
NEW QUESTION # 284
A certain park deployed IPv6 for service testing. At the initial stage of deployment, engineers wanted to achieve network interoperability through Pv6 static routing. When creating IPv6 static routes. You can specify both the outgoing interface and the next hop, or only the outgoing interface or only the next hop.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 285
The address family information field of MP_REACH_NLRI consists of a 2-byte address family identifier AFI and a 1-byte sub-address family identifier SAFI. When public IPv4 routes are transmitted under the BGP-IPv4 unicast address family, SAFI is 1. When public IPv6 routes are transmitted under the BGP- IPv6 unicast address family, SAFI is also 1.
- A. True
- B. False
Answer: A
NEW QUESTION # 286
As shown below:
- A. ShouldLSAis of typeAS-extermal-LSA
- B. ShouldLSAThe described destination network is10.0.23.0/24
- C. in the pictureLSAis generated by this router
- D. This device isA, BR
Answer: B
NEW QUESTION # 287
VLAN aggregation is deployed in a switching network, where Sub-VLAN 2 and Sub- VLAN 3 are added to Super-VLAN 10. If hosts in different Sub-VLANs want to communicate with each other, the command () inter-sub-vlan-proxy enable should be entered in the VANIF 10 interface view corresponding to Super-LAN.
Answer:
Explanation:
arp-proxy
NEW QUESTION # 288
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