H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 04

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 04

1. SWA and SWB are connected through two physical Ethernet links. SWA has the following interface configurations:

   

   The two links are aggregated.
   Assume that the configuration on SWB is correct. Given this information, which of the following statements are true?

   •  GigabitEthernet1/0/1 and GigabitEthernet1/0/1 can be added to the same LAG without changing the current configurations.
   • After link aggregation is configured on SWA and SWB, if MSTP is enabled on them, GigabitEthernet1/0/1 and GigabitEthernet1/0/2 enter the Forwarding state in MSTP.
   • GigabitEthernet1/0/1 and GigabitEthernet1/0/2 can be added to the same LAG only after the configuration of GigabitEthernet1/0/2 is changed to be the same as that of GigabitEthernet1/0/1.
   • GigabitEthernet1/0/1 and GigabitEthernet1/0/2 cannot be added to the same LAG because the allowed VLANs are different.

2. Which of the following command outputs indicates that a loop has occurred on a switch?

   • 

   • 

   • 

   • 

3. Which of the following statements regarding the process of sending and receiving data frames on a port in access link-type is true?

   • Tagged data frames that are received are directly discarded.
   • Only untagged data frames are received.
   • VLAN tags are removed before data frames are sent.
   • A switch learns the destination MAC address in the data frames when they are received on the switch’s port.

4. How long will a Huawei running RSTP wait before aging out the BPDUs on an interface?

   • Hello time interval
   • 6 seconds
   • MaxAge interval
   • BPDUs on the interface will not be aged out
   • Forward delay

5. Which of the following statements regarding LACP are true?

   • You can run the following commands to delete member interfaces from an Eth-Trunk:
     interface GigabitEthernet0/0/1
     shutdown
     interface GigabitEthernet0/0/1
     undo eth-trunk 1
     interface GigabitEthernet0/0/1
     undo shutdown
   • You can run the following commands to prevent frequent flapping due to physical link faults on an Eth-Trunk:
     interface eth-trunk 1
     lacp preempt enable
     lacp preempt delay delay-time
   • You can run the following commands to add member interfaces to an Eth-Trunk:
     interface GigabitEthernet0/0/1
     shutdown
     interface eth-trunk 1

     trunkport GigabitEthernet0/0/1
     interface GigabitEthernet0/0/1
     undo shutdown

   • You can run the following commands to enable load balancing based on source IP addresses for an Eth-Trunk:
     interface eth-trunk 1
     load-balance src-dst-ip

6. Which of the following statements regarding PPPoE data frames are true?

   • The Ethernet_Type field has a fixed value of 0x8863.
   • The Session_ID field of a PPP session must be the value specified in the Discovery phase and cannot be changed.
   • When PPPoE is used to transmit session data, Code must be set to 0x0.
   • After a PPPoE session is set up, all Ethernet packets are unicast.

7. As shown in the figure below, R1 and R2 are connected through a PPP link, and the IP addresses on the directly connected interfaces are not on the same network segment. R1 and R2 can communicate with each other through the directly connected interfaces. However, communication on the Ethernet link fails if the IP addresses on the directly connected interfaces are on the same network segment. What are the causes of this?

   

   • The Ethernet header does not need to be encapsulated into data packets between R1 and R2 that are directly connected through a POS interface, and ARP does not need be used to obtain MAC addresses.
   • R1 and R2 that are directly connected through a POS interface learn the MAC address of each other using LCP, and ARP does not need to be used to obtain MAC addresses.
   • R1 and R2 that are directly connected through a POS interface learn the 24-bit subnet route of each other through IPCP.
   • R1 and R2 that are directly connected through a POS interface learn the 32-bit host route of each other through IPCP.

8. Routes received from AS100 match the AS-Path filter configured using the ip as-path-filter 10 permit_100$ command.

   • TRUE
   • FALSE

9. On a broadcast network, DIS election starts only after the neighbor relationship is established.

   • TRUE
   • FALSE

10. Which of the following attributes cannot be directly referenced by the if-match clause of route-policies?

    • Community-filter
    • IP-prefix
    • AS-Path-filter
    • Regular expression

11. The figure shows router data. Which of the following statements is false?

    

    • The system ID of R3 is 0003.0000.0000.
    • R3 is a level-1-2 router.
    • R3 is the DIS of a Level-1 link.
    • R3 is the DIS of a Level-2 link.

12. Which of the following configurations regarding OSPFv3 route aggregation are true?

    • [Huawei]ospfv3 1
      [Huawei-ospfv3-1]asbr-summary fc00:0:0:: 48 cost 20 tag 100
    • [Huawei]ospfv3 1
      [Huawei-ospfv3-1]abr-summary fc00:0:0:: 48 cost 400
    • [Huawei]ospfv3 1
      [Huawei-ospfv3-1]area 1
      [Huawei-ospfv3-1-area-0.0.0.1]abr-summary fc00:0:0:: 48 cost 400
    • [Huawei]ospfv3 1
      [Huawei-ospfv3-1]area 1
      [Huawei-ospfv3-1-area-0.0.0.1]asbr-summary fc00:0:0:: 48 cost 20 tag 100
    • [Huawei]interface gigabitethernet 1/0/0
      [Huawei- Gigabitethernet1/0/0]asbr-summary fc00:0:0:: 48 cost 20

13. On a Huawei device, when an external route is imported to IS-IS and the tag of the external route is set, the IS-IS metric type does not need to be changed, and the default style is retained.

    • TRUE
    • FALSE

14. As shown in the following topology, EBGP runs between AS100, AS200, AS300, and AS400, and peer relationships have been established between them. When AS400 receives a BGP route to the network segment 1.1.1.1/32 from AS100, which of the following is the correct value of the AS_Path attribute?

    

    • 100,200,300,400
    • 300,200,100
    • 400,300,200,100
    • 100,200,300

15. If no area is divided, which of the following statements regarding the link-state routing protocol are true?

    • Routers in the same routing domain may repeatedly receive the same link state information.
    • Routers in the entire routing domain have the same LSDB.
    • Each router establishes a routing domain topology.
    • Each router learns routing entries from updated routing information and adds them to the routing table.
    • The router sends all link state information from a neighbor to all other neighbors to ensure data synchronization in the database.

16. A route selection tool can define multiple entries. Which of the following tools will automatically generate a deny-any entry at the end of the configuration?

    • Route policy
    • IP-prefix
    • Community-filter
    • AS-Path-filter

17. The figure shows the topology and configuration. Which of the following methods can be used to exclude the specific route 10.0.3.3/32 from the routing table of R1?

    

    • On R2, configure a filter-policy, use the ACL applied to the filter-policy to match 10.0.3.3/32, and apply the filter-policy to the export direction.
    • Configure route summarization on R2 and summarize routes as 10.0.0.0/16.
    • On R1, configure a filter-policy, use the ACL applied to the filter-policy to match 10.0.3.3/32, and apply the filter-policy to the import direction.
    • Configure route summarization on R3 and summarize routes as 10.0.0.0/16.

18. If the Option field in the OSPFv3 Hello packet sent from GigabitEthernet0/0/0 of router A is 0x000013, which of the following statements are true?

    • GigabitEthernet0/0/0 of router A belongs to an NSSA.
    • GigabitEthernet0/0/0 of router A participates in IPv6 route calculation.
    • Router A supports flooding of AS-external-LSAs.
    • Router A is an OSPFv3 device enabled with the forwarding capability.

19. As shown in the following figure, R1, R2, and R3 run OSPF and advertise their loopback interface addresses into OSPF. Which of the following statements is false?

    

    •  The filter import command can be executed on R2 in Area 0 to filter loopback interface routes of R3.
    • The filter-policy import command can be executed on R1 to filter loopback interface routes of R3.
    • The filter export command can be executed on R2 in Area 1 to filter loopback interface routes of R3.
    • The filter-policy export command can be executed on R2 to filter loopback interface routes of R3.

20. After IS-IS area authentication is configured, which of the following IS-IS packets will carry authentication information?

    • IS-IS Level-1 SNPs and LSPs
    • IS-IS Level-1 Hello PDUs
    • IS-IS Level-2 Hello PDUs
    • IS-IS Level-2 SNPs and LSPs