H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 13

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 13

1. Which of the following statements regarding OSPFv3 LSAs are true?

   • The Link State ID of an Inter-Area-Prefix-LSA contains prefix information
   • Router-LSAs and Network-LSAs do not contain routing information
   • Inter-Area-Prefix-LSAs contain link-local information
   • When the Referenced Link State Type of an Intra-Area-Prefix-LSA is 2, the Referenced Link State ID contains the interface ID of the DR

2. When a Layer 3 switch forwards IP packets between locally attached VLANs, which of the following fields is rewritten?

   • Layer 2 TTL
   • Layer 3 transport protocol
   • Layer 3 destination IP address
   • Layer 3 source IP address
   • Layer 3 TTL

3. Regular expressions can be used in Community-filter and AS-Path-filter to filter routes.

   • TRUE
   • FALSE

4. Which of the following statements regarding an OSPF virtual link is true?

   • A virtual link can be used to solve the problem of a non-continuous Area 0
   • A virtual link uses the IP address of the outbound interface as the link address
   • A virtual link can be established in any area, and the virtual link belongs to the area after it is established
   • A virtual link with a cost of 0 is the optimal link

5. A Huawei router is configured to import a route into OSPF on an enterprise network. Which of the following statements about the LSA generated from the imported route are true?

   • The Net Mask field is set to all 0s
   • The Link State ID, and Advertising Router fields can uniquely identify an LSA
   • The Advertising Router field is set to the ASBR’s Router ID
   • The Link State ID field is set to the destination network segment address

6. The router ISIS interfaces and peers are as follow. Which of the following statements is true?

   

   • IS-IS IPv4 and IS-IS IPv6 are enabled on Eth0/0/1 of R3
   • The circuit-level of Eth0/0/1 on R3 is Level-1-2
   • R3 has established a L1 adjacency on GE0/0/0
   • R3 is the Level-1 DIS and Level-2 DIS for the link where Eth0/0/0 resides

7. As shown in the following figure, R1 can connect to the Internet through R2 or R3. EBGP connections are set up between R1 and R2 and between R1 and R3. R2 and R3 reside in the same AS and advertise default routes using BGP. Which of the following methods can be used to enable traffic from R1 to the Internet to be preferentially forwarded by R2?

   

   • On R2, set the Local_Pref value to 150 in the egress direction of R1
   • On R1, set the MED attribute value to 150 in the ingress direction of R3
   • On R1, set the Local_Pref attribute value to 150 in the ingress direction of R2
   • On R2, set the MED attribute value to 150 in the egress direction of R1

8. In the aggregate ipv4-address {mask | mask-length} [as-set | attribute-policy route-policy-name1 | detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy-name3] command, multiple parameters can be used to affect the BGP summarized route and summarization result. Which of the following statements regarding this command are true?

   • If the origin-policy parameter is specified, only the specific routes matching route-policy are summarized.
   • If the attribute-policy parameter is specified, attributes of the summary route can be modified.
   • If the suppress-policy parameter is specified, a summary route is generated. The if-match clause of the route-policy can be used to filter specific routes to be suppressed. The specific routes matching route-policy are still advertised to other BGP peers.
   • If the as-set parameter is specified, the AS_Path attribute of the summary route contains AS path information about all specific routes to prevent loops.

9. To reduce the amount of OSPF data and routing information in some areas, OSPF has special area types. Which of the following statements regarding OSPF special areas is true?

   • The ASBR-summary-LSA can be advertised to an NSSA
   • The AS-external-LSA can be advertised to a stub area
   • Any OSPF area can be configured as a special area
   • A router in a special area cannot establish an OSPF neighbor relationship with a router in a common area

10. Which of the following AS-paths can be matched by the AS-Path filter configured using the ip as-path-filter 1 permit ^12.*74$ command?

    • AS_Path (32 1274 23)
    • AS_Path (125 328 74 23)
    • AS_Path (123 621 743 2374)
    • AS_Path (321 12 2374)

11. A Route Distinguisher (RD) is used to distinguish the same IP address in different VPNs. How many bits does an RD contain?

    • 64
    • 128
    • 32
    • 16

12. Which of the following technologies can be used to improve the MPLS BGP VPN reliability?

    • VPN GR
    • FRR for private IP routes between Pes and CEs
    • VPN FRR
    • CE dual-homing networking at the access layer

13. Typically, users within a VPN only communicate with other users in the same VPN. They cannot communicate with users on the Internet or access the Internet. Many VPN sites, however, may need to access the Internet. Which of the following statements regarding interconnection between the VPN and the Internet are true?

    • The interconnection between the VPN and the Internet can be implemented on the PE. However, the implementation is complex and may bring security risks. The PE is vulnerable to DoS attacks from the Internet.
    • Directly connect the CE to the Internet on the user side. Each user site can independently access the Internet. That is, a default route destined for the Internet is configured on the CE of each site.
    • Configure the PE to send a default route destined for the Internet to the CE, and add a default route destined for the Internet gateway to the VPN instance routing table.
    • Isolating public network routes and VPN routes on the user side is simple, secure, and reliable.

14. If a multicast group has multiple receivers and the administrator enables the IGMP snooping function on the switch connected to the receivers, how do the receivers respond after receiving General Query messages from the querier?

    • Only the receiver whose response timer expires firstly sends a Report message
    • All receivers send Report messages
    • All receivers send Report messages only when IGMPv1 is run
    • All receivers send Report messages only when IGMPv2 is run

15. Which MAC address corresponds to the multicast IP address 229.130.130.1?

    • 01-00-5E-82-82-01
    • 00-00-5E-02-82-01
    • 01-00-5E-02-82-01
    • 00-00-5E-82-82-01

16. Which of the following statements regarding the Register message on a PIM-SM network are true?

    • The Register message is sent from a source DR
    • The Register message is sent to the RP in unicast mode
    • The Register message is sent from a receiver DR
    • The RP learns multicast source information from the Register message

17. IPSG static binding entries can be configured, or they can be generated when IPSG and DHCP Snooping are used together.

    • TRUE
    • FALSE

18. To configure AAA, you need to configure a RADIUS server as follows:

    [Huawei]radius-server template EXAM
    [Huawei-radius-EXAM]radius-server shared-key cipher HUAwei123
    [Huawei-radius-EXAM]radius-server authentication 10.7.66.66 1812
    [Huawei-radius-EXAM]radius-server authorization 10.7.66.66 1812
    [Huawei-radius-EXAM]radius-server accounting 10.7.66.66 1813
    [Huawei-radius-EXAM]radius-server retransmit 2

    • TRUE
    • FALSE

19. As shown in the figure, Department A of Branch 1 can access the Internet, and Department B can access headquarters resources only through the encrypted VPN. You can configure a NAT policy on the egress device in Branch 1 to allow Department A to still access the Internet, and configure an IPsec VPN (ESP protocol) in tunnel mode for Department B to allow Department B to access the headquarters.

    

    • TRUE
    • FALSE

20. In traffic policing, dual buckets at dual rates are used. The number of tokens in bucket C is TC, and the number of tokens in bucket P is TP. When a packet with a length of B is received, which of the following statements are true?

    • If (TP-B) and (TC-B) are larger than 0, the packet is marked green
    • If (TP-B) is larger than 0 and (TC-B) is smaller than 0, the packet is marked yellow
    • If (TP-B) is larger than 0 and (TC-B) is smaller than 0, the packet is marked green
    • If (TP-B) and (TC-B) are smaller than 0, the packet is marked red