Prepare Important Exam with H12-831_V1.0-ENU Exam Dumps(2026) [Q73-Q93]

QUESTION 73
In the DU label distribution mode, if the Liberal retention mode is adopted, the device will retain the labels distributed by all LDP peers, regardless of whether the LDP peer is the optimal next hop to the destination network segment.

True

False

QUESTION 74
An engineer uses two routers to test IPv6 services, and runs 0SPFv3 to implement IPv6 network interconnection. R1 is required to be able to access the loopback interface address of R2. The engineer checked the OSPFv3 routing table entry of R1, as shown in the figure, and found that there was no route to the loopback interface address of R2. Which of the following reasons could not be the cause?

R2 advertises the loopback interface into different OSPFv3 processes

R2 does not have 0SPFv3 enabled on the loopback interface

R2 does not use network to advertise loopback address in area 0

R2 is not configured with the Router ID used in the OSPFv3 process

QUESTION 75
Regarding the IPSG, which of the following statement is incorrect?

IPSG can prevent IP address spoofing attacks

IPSG is a source IP address filtering technology based on the three-layer interface

IPSG can turn on the IP packet inspection and alarm function, and cooperate with the network management to perform alarms

IPSG can prevent the host from changing the IP address privately

QUESTION 76
In the figure, the company wants to ensure secure communication between the headquarters and branch, and isolate the R&D areas from non-R&D areas, without changing the current network deployment.
To meet this requirement, an administrator deploys BGP/MPLS IP VPN on the network.

Which of the following statements are true?

To enable communication between the headquarters and branch R&D areas, both the ERT and IRT of VPN1 and VPN2 can be set to 100:100.

To implement communication between the headquarters and branch R&D areas, the RDs of VPN1 and VPN2 need to be set to the same value.

R&D areas and non-R&D areas have overlapping address spaces. Therefore, services in the two areas cannot be isolated.

To isolate R&D areas from non-R&D areas at the headquarters, the RTs of VPN1 can all be set to 100:100 and the RTs of VPN3 can all be set to 200:200.

QUESTION 77
R1 and R2 use directly connected interfaces to establish an EBGP peer relationship. R1 imports 2000:: 1/128 to BGR By default, which of the following is the next hop of the route from R2 to 2000:: 1/128?

2002: 12:: 1

2001:12.1

2003:12::1

2000:12::1

QUESTION 78
The figure shows the logical network architecture of a migration project. The purpose of the migration is to add network device R4 between R2 and R3.
* OSPF runs between network devices.
* After the physical network is connected, a network engineer incorrectly imports the backup configuration of R3 to R4 during the migration.
Given this, which of the following statements are true?

Options:

The OSPF neighbor relationship between R1 and R2 is not affected.

An OSPF neighbor relationship can be established between R2 and R4.

An OSPF neighbor relationship can be established between R3 and R4.

An OSPF neighbor relationship can be established between R1 and R3.

QUESTION 79
IPSG is a source IP address filtering technology based on Layer 3 interfaces. It prevents malicious hosts from forging authorized hosts’ IP addresses to access authorized network resources.

TRUE

FALSE

QUESTION 80
Regarding BGP/MPLS IPVPN routing interaction, which of the following description is wrong?

The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing

After the egress PE receives the VPNv4 route advertised by the ingress PE, it filters the VPNv4 route according to the RT attribute carried by the route

The exchange between PE and CE is IPv4 routing information

The ingress PE will convert the IPv4 route received from the CE into a VPNv4 route, and save it according to different VPN instances

QUESTION 81
A campus has deployed IPv6 for service testing. There are 4 routers (R1, 22, R3 and R4) in this network, running 0SPFV3 to realize the interconnection of IPv6 network. A new router R5 needs to be connected to the network for testing. An engineer introduces a direct route in the OSPFVV3 process of R4 so that devices in the campus network can access the GE0/0/1 port address of R5. Which of the following statements about the scene is true of?

R2will generate aType4 LSAonly inArea 0internal flooding

R4will generate aType5 LSAdescribe bowIenteredIPv6routing prefix

R2will generate aType4 LSAdescribeR4ofRouter ID

R4will generate aType5 LSAonly inArea 1internal flooding

QUESTION 82
Please match the command with the function implemented.

display device-® Display version-® Display memory-usage-® Display cpu-usage-?

QUESTION 83
Network administrator A wants to use A, CL to match only the four routing entries 1 and 3.57 in the figure. Ask the network administrator A at least how many A, CL rules do you need to configure?

2

1

4

3

QUESTION 84
The traditional BGP 4 can only manage IPv4 single routing information. In order to provide support for a variety of network layer protocols, MP-BGP extends BGP-4. MP-BGP uses address families to distinguish different network layer protocols. Which of the following address families are currently supported?

BGP-VPNv4address family

BGP-IPV6Unicast address family

BGP-IPV4broadcast address family

BGP-MPexampleIPv6address family

QUESTION 85
The Router LSA of a router is shown in the figure. Which of the following statements is wrong?

of this routerRouter IDfor10.0.12.1

This router isDR

This router has established an adjacency relationship

This router supports external route import

QUESTION 86
In the process of daily troubleshooting, engineers may need to check some alarm information of the device.
Turn on the debugging/log/alarm information sent by the terminal display information center by executing the terminal () command.
(Please use English lowercase letters to complete the command, and the command cannot be abbreviated)

QUESTION 87
As shown in the figure, on the R1 router, the network administrator can control the path of the traffic entering AS100 after modifying the value of the routing entry sent to R2 through the routing policy.

Yes

wrong

QUESTION 88
In the MPLS network, there are different operation types for labels, among which the meaning of the “pop” action is:

Replace the top label with another value

existMPLSAdd the top label to the label stack

Replace the top label with another set of labels

existMPLSRemove the top label from the label stack

QUESTION 89
When configuring the DHCP Relay function on the device, the VLANIF interface of the relay connected to the client must be bound to the DHCP server group, and the bound DHCP server group must be configured with the proxy DHCP server IP address.

TRUE

FALSE

QUESTION 90
On a BGP/MPLS IP VPN network, VPNv4 routes carry the export RT. Which of the following attributes is used by MP-BGP to carry the export RT?

Extended_Community
MP_REACH_NLRI

Local_Preference

AS Path

QUESTION 91
An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. The logical topology of the network is shown in the figure. Regarding the transmission of IPv6 routes between the two devices, which of the following Is a statement wrong?