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H12-831_V1.0-ENU Dumps Full Questions - Exam Study Guide
Huawei H12-831_V1.0-ENU (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) exam is a certification exam that is designed to test the skills and knowledge of network engineers in the field of advanced routing and switching technology. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is offered by Huawei, which is a leading provider of networking equipment and solutions. The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is the third level of Huawei's Datacom certification program and is designed to validate the skills required for planning, designing, implementing, and maintaining enterprise-level networks.
NEW QUESTION # 89
A campus has deployed IPv6 for service testing. There are 4 routers in the network, running 0SPFV3.
Interconnection of IPv6 networks. As shown in the figure, an engineer checked the LSDB of R2 and intercepted one of them Link-LSAs. Which of the following statements is true about the description of this LSA?
- A. produce theLSAThe router isR2
- B. R2interfaceGE0/0/0IPV6address prefix:2001:2343:23: :/64
- C. ShouldLSAshowR2External routing is not supported, but participatingIPv6route calculation
- D. R2interfaceGEO/O/OThe link-local address force:FE80::2E0;FCFF:FEC, D:4F79
Answer: A,B,D
NEW QUESTION # 90
What is the meaning of ipv6 enable topology ipv6 in IS-IS protocol view?
- A. IPv4 and IPv6 use the same topology for SPF calculation
- B. SPF calculation is performed separately in the topology of IPv4 and lpv6
- C. Does not support IPv6 SPF calculation
- D. Doesn't have any meaning
Answer: B
NEW QUESTION # 91
According to this picture, we can judge that R4 is on?
- A. 2 default routes with different costs
- B. 2 equal-cost default routes
- C. 4 equivalent default routes
- D. 1 default route
Answer: B
NEW QUESTION # 92
A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where R1 and R2 both have OSPF enabled and function as the gateways of PC1 and PC2, respectively.
Given this, which of the following statements are true?
Network Topology:
* R1:
* Interface GE0/0/0: 10.0.12.1/24 (Connected to R2)
* Interface GE0/0/1: 192.168.1.1/24 (Gateway for PC1)
R2:
* Interface GE0/0/0: 10.0.12.2/24 (Connected to R1)
* Interface GE0/0/1: 192.168.1.2/24 (Gateway for PC2)
Options:
- A. R1 cannot ping 192.168.1.12.
- B. R1 cannot ping 192.168.1.2.
- C. PC1 and PC2 cannot ping each other.
- D. R2 cannot ping 10.0.12.1.
Answer: A,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Understanding the network connectivity:
* R1 and R2 are connected through 10.0.12.0/24 and running OSPF in Area 0.
* PC1 (192.168.1.11/24) is connected to R1, and PC2 (192.168.1.12/24) is connected to R2.
* Analyzing each option:
* Option A: "R2 cannot ping 10.0.12.1." # Incorrect
* R2 is directly connected to 10.0.12.1/24 (R1) on GE0/0/0, so it can ping this IP without any routing issues.
* Option B: "PC1 and PC2 cannot ping each other." # Correct
* OSPF is only running between R1 and R2. There is no indication that R1 and R2 are redistributing connected routes (192.168.1.0/24 and 192.168.1.0/24) into OSPF.
* As a result, R1 does not know how to reach 192.168.1.12, and R2 does not know how to reach 192.168.1.11, making communication between PC1 and PC2 impossible.
* Option C: "R1 cannot ping 192.168.1.2." # Incorrect
* 192.168.1.2 is directly connected to R2, and if R1 can reach R2 through OSPF, then R1 should be able to ping 192.168.1.2.
* Option D: "R1 cannot ping 192.168.1.12." # Correct
* 192.168.1.12 is connected to R2, but if R2 does not advertise this network to R1, R1 has no route to reach it.
* Since PC1 (192.168.1.11) and PC2 (192.168.1.12) are on different subnets, and there's no redistribution, R1 cannot reach PC2's IP.
Key Takeaways and Fix Recommendations:
* To allow PC1 and PC2 to communicate, R1 and R2 must advertise their directly connected networks (192.168.1.0/24) in OSPF using the network command or by redistributing connected routes into OSPF.
* Command example:
makefile
CopyEdit
R1:
router ospf 1
network 192.168.1.0 0.0.0.255 area 0
R2:
router ospf 1
network 192.168.1.0 0.0.0.255 area 0
* This would allow R1 to learn about PC2's network and R2 to learn about PC1's network, enabling communication.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* HCIP-Datacom Official Certification Guide, Chapter on OSPF Network Design and Troubleshooting.
* Huawei Datacom Training Materials, Section on OSPF Inter-Area and External Route Advertisements.
* Huawei Datacom Configuration Guide, Command Reference for OSPF network advertisement and route redistribution.
NEW QUESTION # 93
The MPLS architecture consists of the control plane and forwarding plane, each of which contains multiple protocols and entries.
Which of the following tables is used to forward MPLS labeled packets?
- A. RIB
- B. LIB
- C. FIB
- D. LFIB
Answer: D
NEW QUESTION # 94
In an MPLS backbone network, LDP is enabled on all interfaces and IGP routes are present.
However, labeled routes do not appear in the forwarding table. What is the most likely missing configuration?
- A. VRF binding
- B. BGP next-hop-self
- C. Global MPLS enable command
- D. Route-policy for LDP
Answer: C
NEW QUESTION # 95
MPLS can carry multiple network protocol services, including unicast IPv4 services, multicast IPv4 services, unicast IPv6 services, and multicast IPv6 services.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 96
On a PIM-SM multicast network, a network engineer finds that multicast clients cannot receive multicast data.
Which of the following is not a possible cause of this problem?
- A. The RP addresses of multicast devices are different.
- B. The unicast routes from multicast devices to the RP are unavailable.
- C. Downstream interfaces of multicast devices are disabled from forwarding State-Refresh messages.
- D. The downstream interfaces of multicast devices do not receive any (*, G) Join messages.
Answer: C
NEW QUESTION # 97
BGP's prefix-based ORF (Outbound Route Filtering) capability can send the prefix- based ingress policy configured on the local device to the BGP neighbor through the route refresh message.
The BGP neighbor constructs the egress policy based on these policies and filters the routes when they are sent. Compared with configuring the routing policy on the BGP neighbor, this method not only avoids the local device from receiving a large number of useless routes, reduces the CPU usage of the local device, but also effectively reduces the configuration work of the local device.
- A. True
- B. False
Answer: A
NEW QUESTION # 98
Which of the following operations may affect the normal operation of the customer network? (Multiple choice)
- A. Device naming
- B. Software upgrade
- C. Hardware expansion
- D. Routing protocol configuration changes
Answer: B,C,D
NEW QUESTION # 99
Which of the following commands can be used to view BGP VPNv4 routing and BGP private network routing information on PE?
- A. display bgp routing-table address-family vpnv4
- B. display bgp routing-table ipv4-family vpnv4
- C. display bgp vpnv4 routing-table
- D. display vpnv4 bgp routing-table
Answer: C
NEW QUESTION # 100
Regarding multi-instance CE (Mlulti-VPN-Instance CE, MCE), which of the following descriptions is wrong?
- A. MCEandPEThere must be multiple physical links betweenVPINIsolation between instances
- B. haveMCEfunctional devices can be found inBGPIMPLS IP VPNAccess to multiple applicationsVPNExample, reduce the investment of user network equipment
- C. existMCEdevice needs to be differentVPNCreate their own routing table and bind to the correct interface
- D. connected to the sameMCEbut not oneVPNInstance users cannot access each other
Answer: A
NEW QUESTION # 101
On the network shown in the figure, the network administrator deploys DHCP snooping on the switch to defend against bogus DHCP server attacks.
Which of the following interfaces should be configured as the DHCP trusted interface?
- A. GE0/0/4
- B. GE0/0/3
- C. GE0/0/1
- D. GE0/0/2
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding DHCP Snooping and Trusted/Untrusted Ports
1. What is DHCP Snooping?
* DHCP Snooping is a security feature that prevents rogue DHCP servers from providing unauthorized IP configurations to clients.
* It categorizes switch ports into:
* Trusted Ports: Allow DHCP Offer and ACK messages from a legitimate DHCP server.
* Untrusted Ports: Block unauthorized DHCP responses to prevent rogue DHCP attacks.
Analyzing the Network Setup in the Figure
Interface
Connected Device
DHCP Role
Should it be Trusted?
GE0/0/1
PC1 (DHCP Client)
Requests DHCP leases
# Untrusted
GE0/0/2
DHCP Server (Legitimate)
Provides DHCP leases
# Trusted
GE0/0/3
Web Server
Not involved in DHCP
# Untrusted
GE0/0/4
Bogus (Rogue) DHCP Server
Malicious DHCP Server
# Untrusted & Blocked
* GE0/0/2 is connected to the legitimate DHCP server, meaning it should be marked as a TRUSTED interface.
* GE0/0/4 connects to a bogus DHCP server, which must be UNTRUSTED to block unauthorized DHCP responses.
* GE0/0/1 (Client) and GE0/0/3 (Web Server) do not need to be trusted.
# Thus, the correct answer is: D. GE0/0/2.
Final Conclusion:
# GE0/0/2 should be configured as the trusted DHCP interface.# GE0/0/1 (Client) should remain untrusted.# GE0/0/3 (Web Server) does not need DHCP trust.# GE0/0/4 (Bogus DHCP Server) should be blocked.
Thus, the correct answer is: D. GE0/0/2.
NEW QUESTION # 102
A network engineer wants to clear the serial port login password. Which of the following should he enter?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 103
On the network shown in the figure, the DHCP server function is enabled on GE0/0/0 of R2, and the address pool is an interface address pool.
When GE0/0/0 and GE0/0/1 of R1 function as DHCP clients, only one interface can obtain an IP address by default.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 104
In the OSPF network shown in the figure, the area numbers are marked in the figure, where area
1 is an NSSA area, and areas 2 and 3 are common areas. The "default-route- advertise always" command is configured in the SPF process of R5. Which of the following routers have default routes in their routing tables? (Multiple choice)
- A. R3
- B. R2
- C. R4
- D. R6
Answer: A,B,C,D
NEW QUESTION # 105
The routing policy tools that can be used by BGP mainly include Filter-policy and Route-policy. Fiter-policy can only filter routes, and Route-policy can only modify routes.
- A. Yes
- B. wrong
Answer: B
NEW QUESTION # 106
Which of the following commands can be used to view information about BGP VPNv4 routes and BGP private network routes on PEs interest
- A. display bgp routing-table address-family vpnv4
- B. display bgp routing-table ipv4-family vpnv4
- C. display bgp vpnv4 routing-table
- D. display vpnv4 bgp routing-table
Answer: C
NEW QUESTION # 107
In OSPFv3, an LSA whose propagation range is one area has_____kind. (Fill in Arabic numerals only)
Answer:
Explanation:
9
NEW QUESTION # 108
If the BFD session goes down, the direct link will fail.
- A. False
- B. True
Answer: A
NEW QUESTION # 109
As shown in the figure, R1, R2, and R3 run WPLS, and the administrator configures a static LSP from the 1.1.1.0/24 network segment to the 3.3.3.0/24 network segment.
Which of the following descriptions of this scene are correct? (Multiple choice)
- A. PC2 can access PC1
- B. R3 will perform MPLS forwarding on the traffic sent from PC2 to PC1.
- C. R1 will perform MPLS forwarding on the traffic sent from PC1 to PC2.
- D. PC1 cannot access PC2
Answer: A,C
NEW QUESTION # 110
In the network shown in the figure, the network engineer found that the path between PC1 and PC2 is not the optimal path, and the cost value of each link is the same. Based on this analysis, which of the following routers may be the root bridge of this layer 2 network? (Multiple choice)
- A. Sw2
- B. SW1
- C. SW3
- D. SW4
Answer: B,D
NEW QUESTION # 111
The OSPF protocol runs between CE and PE, when CE1 advertises the route of the site to CE2. Which of the following description is wrong?
- A. When PE2 receives the same Domain ID as the local BGP route sent by PE1, for Type3 LSA, PE2 will generate Type5 LSA
- B. When PE2 receives a BGP route from PE1 that carries a different Domain ID from the local one, it is correct for all LSAs, and PE2 will generate Type5 LSA or Type7 LSA
- C. When PE2 receives the same Domain ID as the local BGP route sent by PE1, PE2 will generate Type3 LSA for Type1 LSA and Type2 LSA
- D. The Domain ID configured by PE1 can be used as an extended community attribute of BGP and sent along with the route to PE2.
Answer: A
NEW QUESTION # 112
Which of the following will not cause the VRRP backup group to oscillate?
- A. The time interval of notification messages is too small
- B. Backup device interface packet loss
- C. The link that transmits VRRP notification packets flaps
- D. The VRRP backup group preemption delay configuration on both ends is inconsistent
Answer: D
NEW QUESTION # 113
By default, the time interval for sending OSPF Hello messages on P2P and Broadcast type interfaces is 10 seconds, and the neighbor expiration time is 40 seconds.
- A. True
- B. False
Answer: A
NEW QUESTION # 114
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