Practice Free H12-831_V1.0-ENU Exam Online Questions
When the administrator enables the MPLS LDP function of the device, which of the following commands must be configured first?
- A . [Huawei] mpls 1sr-id 1.1.1. 1
- B . [Huawei-GigabitEthernet0/0/1] mpls ldp
- C . [Huawei-GigabitEthernet0/0/1] mpls
- D . [Huawei] mpls ldp
When the administrator enables the MPLS LDP function of the device, which of the following commands must be configured first?
- A . [Huawei] mpls 1sr-id 1.1.1. 1
- B . [Huawei-GigabitEthernet0/0/1] mpls ldp
- C . [Huawei-GigabitEthernet0/0/1] mpls
- D . [Huawei] mpls ldp
In the network shown in the figure, R1 and R2 establish an EBGP neighbor relationship through the Loopback0 interface. R1 imports the route 2001::1/128 into BGP, and then cancels the import of the route. After R1 cancels the import of the route, the value of the Next Hop field of MP_UREACH_NLRI in the Update message sent by R1 is 2000::1.
- A . True
- B . False
When dealing with a fault in the existing network, a network engineer drew a topology diagram as shown in the figure. All routers run OSPF.
Which of the following descriptions about the access path between PC1 and PC2 is correct?
- A . The path from PC1 to PC2 is: PC1-R1-R2-PC2; the path from PC2 to PC1 is: PC2-R2-R1-PC1
- B . The path from PC1 to PC2 is: PC1-R1-R3-R2-PC2; the path from PC2 to PC1 is: PC2-R2-R1-PC1
- C . The path from PC1 to PC2 is: PC1-R1-R2-PC2; the path from PC2 to PC1 is: PC2-R2-R3-R1-PC1
- D . The path from PC1 to PC2 is: PC1-R1-R3-R2-PC2; the path from PC2 to PC1 is: PC2-R2- R3-R1-PC1
As shown in the OSPF network, the area numbers are marked in the figure, where area 1 is a common area, area 2 is a Totally NSSA area, and area 3 is an NSSA area. R5 introduces the external route 10.0.5.5/32 into OSPF.
Which of the following routers have a route entry for 10.0.5.5/32 in their routing tables? (Multiple choice)
- A . R2
- B . R3
- C . R4
- D . R6
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 . FIB
- B . RIB
- C . LIB
- D . LFIB
D
Explanation:
Comprehensive and Detailed In-Depth
MPLS packet forwarding is based on label information stored in the LFIB (Label Forwarding Information Base).
The role of different tables in MPLS:
RIB (Routing Information Base): Stores routing information, but does not handle MPLS label forwarding.
LIB (Label Information Base): Stores label bindings but is used for control-plane operations.
FIB (Forwarding Information Base): Used for IP forwarding, not MPLS forwarding.
LFIB (Label Forwarding Information Base): The correct table, which maps incoming labels to outgoing labels (or actions like swap, push, pop) and is used for actual MPLS packet forwarding.
Reference: HCIP-Datacom Advanced Routing & Switching Technology C MPLS LFIB and Label Forwarding
When IP packets pass through the MPLS network, the MPLS device will process the TTL.
If the topology shown in the figure adopts the Pipe processing mode, which of the following are the TIL values in the IP packets?
- A . â‘ =255, â‘¡ =254, â‘¢ =252
- B . â‘ =254, â‘¡ =254, â‘¢ =253
- C . â‘ =255, â‘¡ =255, â‘¢ =254
- D . â‘ =254, â‘¡ =253, â‘¢ =252
The device operating environment is crucial for stable device operating, including the equipment room, power supply, and heat dissipation. Maintenance personnel must be on site to maintain the device operating environment.
- A . TRUE
- B . FALSE
When the administrator statically configures the Ingress node of LSP, it is recommended to establish a static LSP by specifying the next hop to ensure that there is a routing entry in the local routing table that exactly matches the specified destination IP address.
- A . True
- B . False
When traffic accesses the backbone network, VPN isolation is required. At this time, the interface configuration of a PE router is as shown in the figure.
If the administrator needs to bind the interface to VPN1 and the interface IP address remains unchanged, which of the following descriptions of the administrator’s operation is correct?
interface GigabitEthernet 0/0/1
ip address 192168.100.2 24
- A . After the administrator enters the command ip binding vpn-instance VPN1 in the interface view, it is also necessary to bind the RD value of VPN1
- B . After the administrator types the command ip binding ypn-instance VPN1 in the interface view, he needs to bind the RT value of VPN1.
- C . After the administrator enters the command ip binding vpn-instance VPN1 in the interface view, he needs to reconfigure the interface IP address
- D . The administrator can type the command ip binding vpn-instance VPN1 in the interface view.