H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 09

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 09

1. Which of the following statements regarding BGP route summarization is true? (Choose two.)

   • Routes in the local BGP routing table can be manually aggregated.
   • After the aggregate ipv4-address mask command is configured, only summary routes are advertised and specific routes are not advertised.
   • By default, automatic BGP route summarization is enabled.
   • BGP supports manual aggregate and automatic summarization of IPv6 routes.

2. The IS-IS overload bit is set on R3. Which of the following statements are true? (Choose three.)

   

   •  Before the timeout of the overload timer on R3, R1 and R2 do not add the LSPs generated by R3 to the SPF tree.
   • The direct route of R3 is ignored by R1 and R2 due to the setting of the overload bit.
   • LSPs of R3 cannot be flooded to R1 and R2.
   • Routes imported to R3 through the import-route command cannot be advertised.
   • When a router is experiencing a memory shortage, the system automatically sets the overload bit in the sent LSPs regardless of whether you have the set-overload command.

3. Which of the following statements regarding CHAP authentication in the PPP protocol are true? (Choose three.)

   • If no user name is configured for the authenticated party, the password does not need to be configured on the interface of the authenticated party.
   • The MD5 algorithm is used to calculate a hash based on the authentication sequence ID, a random number, and the key.
   • Authentication requires three-way handshake. Only the user name is transmitted on the network, not the password.
   • The user name must be configured on the interface of the authenticated party.

4. Which of the following statements regarding 802.1s deployment is true?

   • Multiple bridges share a spanning tree instance.
   • Each VLAN owns a spanning tree instance.
   • Multiple VLANs share a spanning tree instance.
   • All VLANs share a spanning tree instance.

5. Based on the key configurations, as shown in the figure, R1 and R2 establish a Level-2 neighbor relationship. Which of the following statements regarding routing entries on R2 are true?

   

   •  2020:: /64 will be displayed in the IP routing table.
   • 2021:: /64 will be displayed in the IP routing table.
   • 2019:: /64 will not be displayed in the IP routing table.
   • 2022:: /64 will not be displayed in the IP routing table.

6. For Huawei S series switches, to control which member switch becomes the master switch of a stack, first power on the switch you wish to be the master switch, and then wait 20 seconds before powering on the other member switches.

   • TRUE
   • FALSE

7. A network with the typology shown in the figure below is set up in a lab. On the network, SW1 uses the default configurations, and STP disables on SW2. Given this information, which of the following statements is true?

   

   • Go/0/2 of SW2 enters the Discarding state.
   • G0/0/1 of SW1 enters the Discarding state.
   • G0/0/1 of SW2 enters the Discarding state.
   • No interface is blocked.
   • G0/0/2 of SW1 enters the Discarding state.

8. Huawei switches SWA and SWB are connected through seven physical Ethernet links and are configured with static link aggregation. On SWA, the interface and are configured in the following sequence: Ethernet 1/0/1, Ethernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, Ethernet 1/0/5, Ethernet 1/0/6,

   Ethernet 1/0/7. If only six ports are supported in a LAG on SWA and SWB, which of the following statements is true?

   • If the configurations of different ports are consistent, SWA selects one of the seven ports at random to be the Unselected port of the LAG.
   • If the configurations of different ports are consistent, Ethernet 1/0/6 is the Unselected port of the LAG.
   • If the configurations of different ports are consistent, Ethernet 1/0/7 is the Unselected port of the LAG.
   • If the configurations of different ports are consistent, Ethernet 1/0/1 is the Unselected port of the LAG.

9. An MSTP switch considers an RSTP switch to be an MSTP region that consists of only one switch and parses RST BPDUs into MST BPDUs, in which IRPC is 0.

   • TRUE
   • FALSE

10. On an RSTP-enabled switch, if the network topology changes, which of the following statements regarding changes to the Layer 2 forwarding entries learned by the switch is true?

    • All entries, apart from the entries related to edge ports, are deleted.
    • If the aging time is set to 15 seconds, all the aged entries are deleted.
    • All entries, apart from the entries related to edge ports and the entries related to the port that receives the TC BPDU, are deleted.
    • All entries are deleted.
    • Only the entries related to the port that receives the TC BPDU are deleted.

11. The figures below show an enterprise’s Layer 2 networking architecture and information displayed when engineers check the device status after communication between departments fails.

    

    What are the possible causes of this communication failure?

    • The switches have different region names.
    • The switches have different instance-VLAN mapping configurations.
    • The switches have different revision levels.
    • The switches have different BPDU sending intervals.

12. You are performing troubleshooting on a LAN and suspect that the error is caused by mismatching working modes.

    Which of the following switch interface errors indicate that the working modes of the 10/100/1000 Ethernet interfaces do not match?

    • Alignment error
    • Excessive collisions
    • Undersized frame
    • Late collisions
    • FCS error

13. The ip ip-prefix ip-prefix-name [ index index-number ] {permit | deny} ipv4 address mask-length [ greater-equal greater-equal-value ] [ less-equal- less-equal-value ] command is used to configure an IP prefix list for route filtering.

    If the less-equal parameter of an IP prefix list is specified in this command but the greater-equal parameter is not specified, what is the range of the created IP prefix list?

    • [mask-length, less-equal-value]
    • [less-equal-value, 32]
    • Unlimited
    • [0, less-equal-value]

14. An OSPF router is connected to Area 0 and Area 1, and Area 1 is configured as a stub area.

    Which type of LSAs are in Area 1?

    • Type 1, Type 2, and Type 5 LSAs
    • Type 1, Type 2, and Type 3 LSAs
    • Type 3 and Type 4 LSAs
    • Type 7 LSA
    • Type 1 and Type 2 LSAs

15. According to the following scenario, which of the following statements are true?

    

    •  R1 and R2 cannot establish a neighbor relationship.
    • R1 has both Level-1 and Level-2 LSDBs.
    • R1 has a route to the IP address 10.0.2.2/32 of loopback0 on R2.
    • R1 can successfully ping the IP address of loopback0 on R2.

16. Which of the following statements regarding OSPFv3 Router-LSAs is true?

    • The data part of a Router-LSA contains the interface IDs of the local router and its neighbors’ router ID.
    • When LS type in the LSA header is 0x0001, the data part of the LSAs is a Router-LSA.
    • Similar to OSPFv2, the Option field exists in an LSA header rather than the data part of a Router-LSA.
    • The data part of a Router-LSA contains the link-local address.

17. According to the figure shown and assuming that IPv6 is enable on ISIS process of all routers, R1, R2, and R3 establish Level-2 neighbor relationships. Which of the following statements regarding the IP routing table of R3 are true? (Choose all that apply.)

    

    •  2019::/64 will be displayed in the IP routing table
    • 2020::/64 will be displayed in the IP routing table
    • 2021::/64 will be displayed in the IP routing table
    • 2021::/64 will be displayed in the IP routing table

18. Which of the following statements regarding OSPFv3 is false?

    • Multiple instances can be run on a single link.
    • Each OSPFv3 process runs independently in a router.
    • The OSPFv3 packet header contains the Instance ID field.
    • Multiple instances can be run in the same OSPFv3 process on an interface.

19. Router HW1 runs BGP, and has IBGP peers and EBGP peers configured.

    Which of the following statements regarding the IBGP peers and EBGP peers are true?

    • The router sends BGP updates learned from each IBGP peer to the other IBGP and EBGP peers.
    • The IBGP peers must be directly connected. Otherwise, multi-hop IBGP must be configured on the router.
    • The EBGP peers can establish peer relationships through loopback interfaces.
    • The router sends BGP updates learned from each EBGP peer to the other EBGP and IBGP peers.
    • The EBGP peers must be directly connected. Otherwise, multi-hop EBGP must be configured on the router.

20. Which of the following statements regarding IS-IS GR is true?

    • A new TLV is defined to support IS-IS GR.
    • IS-IS GR is enabled by default.
    • IS-IS GR uses four timers.
    • IS-IS GR uses CSNPs for event notification and neighbor relationship maintenance.