Ultimate Guide to Prepare H12-831_V1.0 Certification Exam for HCIP-Datacom in 2025
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NEW QUESTION # 74
Regarding the description of the MPLS forwarding mechanism, which of the following is correct? (Multiple choice)
- A. When an IP packet enters the MRLS domain, the FIB table is the first to be checked
- B. The system automatically assigns an ID to the upper-layer application that uses the tunnel, also known as Tunnel ID
- C. If the Tunnel ID value is not 0x0, and then enter the normal IP forwarding process
- D. If the Tunnel ID value is 0x0, and then enter the MPLS forwarding process
Answer: A,B
NEW QUESTION # 75
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 ipv4-family vpnv4
- B. display bgp routing-table address-family vpnv4
- C. display bgp vpnv4 routing-table
- D. display vpnv4 bgp routing-table
Answer: C
NEW QUESTION # 76
There is the concept of forwarding equivalent FEC in MPLS. Which of the following descriptions is wrong? (Multiple choice)
- A. The packets of the same FEC will be processed differently in the MPLS network
- B. MPLS classifies packets with the same forwarding processing method into one category, which is called FEC
- C. A forwarding equivalence FEC will be assigned a unique label value on all routers
- D. The division of FEC is very flexible. It can be based on any combination of source address, address, source port, destination port, protocol type or VPN, etc.
Answer: A,C
NEW QUESTION # 77
Part of the configuration of R1 is as follows. Which statement about IS-IS on R1 is correct?
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- A. process1Also contains global routing information. andVRFtt,rrrouting information
- B. process2with process3routing information will be shared
- C. process2with process3The routing information is isolated
- D. process1Contains only global routing information
Answer: C,D
NEW QUESTION # 78
On a stable network that requires fast route convergence, you can change the value of the interval at which OSPF LSAs are updated to 0 so that topology or route changes can be immediately advertised on the network through LSAs, which speeds up route convergence.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 79
What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)
- A. P-2-P
- B. TransNet
- C. StubNet
- D. Vlink
Answer: A,B,C,D
NEW QUESTION # 80
As shown in the figure, Client1 and Client2 act as clients of RR1 and RR2 at the same time, and RR1 and RR2 are in the same In a Cluster, R introduces 10 routes. It is assumed that the configuration of B, CP is correct. Neighbor relations have been established Now, how many routing entries exist in the BGP routing table of Client2?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 81
Which of the following statements about the freeway of LDP label retention is correct? (Multiple choice)
- A. Save memory and label space
- B. Keep all labels distributed by neighbors
- C. Need more memory and label space
- D. Only keep labels from next-hop neighbors, discard all labels sent by non-next-hop neighbors
Answer: B,C
NEW QUESTION # 82
Which of the following regarding the configuration description is wrong?
- A. Enabling the DHCP Snooping configuration can be used to prevent ARP spoofing attacks
- B. Enabling the DHCP Snooping configuration can be used to prevent DHCP Server counterfeiters from attacking
- C. Configure GigabitEthernet0/0/1 as a trusted interface
- D. If the DHCP request message received by the GigabitEthemnet0/0/1 interface does not contain the SutOption information of Option82, the device will generate Option82 and insert it into the message
Answer: A
NEW QUESTION # 83
On the OSPFv3 network shown in the figure, area 1 is a common area. Which of the following statements are true?
- A. The LSDBs of R1, R2, and R3 are the same.
- B. R1, R2, and R3 generate Inter-Area-Prefix-LSAs.
- C. If R5 imports an external route, R4 does not need to rely on the Inter-Area-Router-LSA to calculate the external route.
- D. The LSDBs of R4 and R5 are the same.
Answer: B,D
NEW QUESTION # 84
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.
* R1 and R2 function as the gateways for PC1 and PC2, respectively.
Given this, which of the following statements are true?
Options:
- A. R2 can ping 192.168.1.2.
- B. PC1 and PC2 cannot ping each other.
- C. R1 can ping 192.168.1.21.
- D. R1 can ping 192.168.1.22.
Answer: A,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Network Topology
* R1 and R2 are OSPF-enabled routers connected via the 10.0.12.0/24 subnet (Area 0).
* PC1 (192.168.1.2/30) is connected to R1 via GE0/0/1.
* PC2 (192.168.1.22/30) is connected to R2 via GE0/0/1.
* OSPF ensures that R1 and R2 know about each other's directly connected networks.
2. Analyzing Connectivity
* Can R1 ping 192.168.1.22 (PC2)?
* Yes, if routing is properly configured.
* OSPF ensures that R1 learns about 192.168.1.22 from R2.
* Since R1 has a route to 192.168.1.22 via R2, it can ping PC2 successfully.
* # Option A is correct.
* Can R1 ping 192.168.1.21 (R2's interface)?
* Yes, since R1 and R2 are OSPF neighbors.
* R1 learns 192.168.1.21 via OSPF and can reach it directly.
* # Option B is correct.
* Can R2 ping 192.168.1.2 (PC1)?
* Yes, since OSPF ensures that R2 learns about 192.168.1.2 from R1.
* Since R2 has a route to 192.168.1.2 via R1, it can ping PC1 successfully.
* # Option C is correct.
* Can PC1 and PC2 ping each other?
* Yes, if default gateways and routing are configured correctly.
* If R1 and R2 can ping each other and forward packets, PC1 and PC2 should be able to communicate.
* # Option D is incorrect because PC1 and PC2 should be able to ping each other.
Final Answer:
# A, B, and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Inter-Router Communication and Route Advertisement
* Default Gateway and Routing in Multi-Router Networks
* Troubleshooting End-to-End Connectivity in Routed Networks
NEW QUESTION # 85
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 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
- B. The Domain ID configured by PE1 can be used as an extended community attribute of BGP and sent along with the route to PE2.
- 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. When PE2 receives the same Domain ID as the local BGP route sent by PE1, for Type3 LSA, PE2 will generate Type5 LSA
Answer: D
NEW QUESTION # 86
Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?
- A. The outer layer label when data is forwarded can beLDPdistribute
- B. The inner label when data is forwarded is defined byMP-BGPdistribute
- C. data inB, CP/MPLS IP VPNWhen the backbone network is transmitted, it always carries two layers of labels
- D. PEsend toCEThe data isIPv4Genuine
Answer: C
NEW QUESTION # 87
Which of the following statements about the MP_REA, CH_NLRI attribute of BGP4+ is correct?
- A. NLRIfield carryIPv6Routing prefix and mask information
- B. AFI (address family)value is2,representIPv6
- C. The length of the next hop address can be16or3
- D. the length of the next hop address is16Time,Network Address of Next Hopcarries the link-local address
Answer: A,B,C
NEW QUESTION # 88
The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when these three routing entries are After the entries arrive at the BP router in order, by default, BGP will finally call a route entry?
- A. Route B
- B. Route A
- C. slightly
- D. Route C
Answer: B
NEW QUESTION # 89
Which of the following are the advantages of VLAN aggregation? (Multiple choice)
- A. Realize the isolation of broadcast domains between Sub-VLANs
- B. Increased the number of available MLANs
- C. Increased flexibility of addressing
- D. Reduce the waste of IP addresses
Answer: A,D
NEW QUESTION # 90
As shown in the figure, Site1 and Site2 need to achieve mutual access through the operator's BGP/MPLS IPVPN. It is known that the public network tunnel between PE1 and PE2 has been established (the label information is shown in the figure), and PF1 has advertised the 192.168.1.0/24 network segment route in Site1 to PE2 through the MP.JIBGP neighbor relationship, and the route learning is normal.
When capturing the data that Site2 visits the 192.168.1.0/24 of Site1 between P and PE1, what should be the outermost label?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 91
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