H12-221 : HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) : Part 01

H12-221 : HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) : Part 01

1. A company has four departments. Department A has 80 PCs, Departments B and C both have 20 PCs, and Department D has 30 PCs. Assuming the IP address 192.168.1.0/x is used, which of the following statements are true if the VLSM technology is employed for subnetting? (Select 2 answers)

   • Plan subnet 192.168.1.0/25 for Department A. The range of host addresses is 1 to 126. 
   • Plan subnet 192.168.1.128/27 for Department B. The range of host addresses is 129 to 159.
   • Plan subnet 192.168.1.160/27 for Department C. The range of host addresses is 161 to 190. 
   • Plan subnet 192.168.1.192/27 for Department D. The range of host addresses is 192 to 222.

2. To which attribute type does the BGP AS-Path attribute belong?

   • Well -known Mandatory 
   • Well-known Discretionary
   • Optional Transitive
   • Optional Non-transitive

3. How many hosts are available per subnet if you apply a /21 mask to the class B network?

   • 510
   • 512
   • 1022
   • 2046

4. Which of the following statements regarding NSSA commands is false?

   • The default-route-advertise command is used to generate a type-7 default route.
   • The no-import-route parameter prevents the import of AS external routes in the form of Type-7 LSAs into an NSSA.
   • The no-summary parameter prevents the advertisement of Type-3 and Type-4 LSAs in an area.
   • The set-n-bit parameter indicates that an N-bit will be set in a DD packet.

5. Which of the following statements regarding RPs are true? (Select 3 answers)

   • Different group addresses on a PIM-SM network corresponds to different RPs.
   • An RP is the root of an RFT
   • An RP is elected out of BSRs.
   • All routers on a PIM-SM network must automatically discover the location of RPs.

6. The Internet Group Management Protocol (IGMP) runs between hosts and their immediately neighboring multicast routers.

   • TRUE 
   • FALSE

7. If there are two BGP routes with the same destination address but different next hops in a BGP routing table, then which statement regarding the two BGP routes is true?

   • Both BGP routes are advertised to other BGP peers.
   • Only the optimal route between the two is advertised to other BGP peers.

8. Which of the following route prefixes match the IP-prefix-filter given below?

   “ip ip-prefix test index 10 permit 10.0.0.0 16 greater-equal 24 less-equal 28” (Select 3 answers)

   • 10.0.1.0/23
   • 10.0.1.0/24
   • 10.0.1.0/25
   • 10.0.1.0/28

9. BGP is an inter-AS routing protocol. Which statements regarding BGP are true? (Select 3 answers)

   • BGP adopts a reliable transmission layer protocol, 
   • BGP supports automatic peer discovery.
   • BGP supports incremental route updates,
   • BGP supports various routing policies.

10. What are the differences between the IGMP versions 1, 2 & 3? (Select 2 answers)

    • IGMPv1/v2 cannot elect devices which may send queries but IGMPv3 can.
    • IGMPv2/v3 members can actively leave groups, whereas in IGMPv1 members cannot 
    • IGMPv1/v2 do not support the SSM service model but IGMFV3 does. 
    • IGMPv1/v2 do not support group-specific queries but IGMPv3 does.

11. Which of these is a valid VLSM subnet obtained by subnetting the network address 172.29.100.0/16?

    • 172.29.100.8/28
    • 172.29.100.32/28
    • 172.29.100.60/28
    • 172.29.100.104/28

12. Which statements regarding prerequisites to establish a BGP peer relationship are true? (Select 2 answers)

    • BGP peers must be manually configured.
    • A TCP connection must be established between two neighboring routers.
    • BGP peers must exchange routing information.
    • MD5 authentication must be configured between BGP peers.

13. An ACL is a series of orderly rules composed of permit deny clauses. Which of the following attributes cannot be used for defining an ACL rule?

    • Source address
    • Destination address
    • Port number
    • AS-Path

14. The process of determining the shortest path can be divided into two phases: determine transit node first, and then determine the stub network.

    • TRUE
    • FALSE

15. Which of the following statements is false?

    [RTA]display ospf peer
    OSPF Process 1 with Router ID 1.1.1.1
    Neighbors
    Area 0.0.0.0 interface 10.1.1.1(Ethernet0/0)’s neighbor(s)
    RouterlD: 2.2.2.2 Address: 10.1.1.2
    State: Full Mode: Nbr is Master Priority: 1
    DR: 10.1.1.1 BDR: 10.1.1.2
    Dead timer expires in 35s
    Neighbor has been up for 04:35:02

    A. The OSPF Router ID of the local router is 1.1.1.1.
    B. The OSPF Router ID of the neighbor is 2.2.2.2.
    C. The OSPF Router ID of the neighbor is larger and thus the neighbor acts as a DR.
    D. The local router acts as slave.

    • The OSPF Router ID of the local router is 1.1.1.1.
    • The OSPF Router ID of the neighbor is 2.2.2.2.
    • The OSPF Router ID of the neighbor is larger and thus the neighbor acts as a DR.
    • The local router acts as slave.

16. Which is the origin attribute of the BGP routes redistributed using the import-route command?

    • IGP
    • EGP
    • Incomplete 
    • Unknown

17. Unlike Stub area, an NSSA supports Type-5 LSAs.

    • TRUE
    • FALSE

18. Which of the following situations will occur when the command “multicast bad balance” is configured? (Select 3 answers)

    • If there exists no unicast equal-cost routes, multicast load balancing fails.
    • If group address-based load splitting is employed, balanced distribution of entries over equal-cost routes cannot be ensured due to hash function limitations.
    • Balanced distribution of entries over equal-cost routes can be ensured as long as multicast load balancing is performed.
    • During multicast load splitting, traffic may not be balanced among equal-cost routes because multicast load balancing is based on multicast entries not multicast data packets.

19. Which of the following conditions must be met for importing routes into BGP using the network command? (Select 2 answers)

    • The routes must be optimal in the IP routing table.
    • The routes do not need to match the specified mask length.
    • The routes must match the specified mask length.
    • The routes must be IGP routes.

20. IGMP interface group report information
    Ethernet6/l/l(40.1.1.1):
    Total 1 IGMP Group reported
    Group: 232.0.0.1
    Uptime: 00:00:22
    Expires: off
    Last reporter: 40.1.1.3
    Last-member-query-counter: 0
    Last-member-query-timer-expiry: off
    Group mode: include
    Versionl-host-present-timer-expiry: off
    Version2-host-present-timer-expiry: off
    Source list:
    Source: 20.1.1.56
    Uptime: 00:00:22
    Expires: 00:05:08
    Last-member-query-counter: 3
    Last-member-query-timer-expiry: 00:00:01
    Source: 20.1.1.57
    Uptime: 00:00:22
    Expires: 00:00:17
    Last-member-query-counter: 3
    Last-member-query-timer-expiry: 00:00:01
    The preceding information shows the entry status of an IGMP interface on Ethernet 6/1/1 on a router.

    Assume IGMP sends the group-and-source-specific Query message. Which of the following statements is true?

    • IGMP sequentially sends two messages; The source carried in one of the messages is 20.1.1.56 with no S flag bit set; the source carried in the other message is 20.1.1.57, with the S flag bit set to1.
    • IGMP sequentially sends two messages: The source carried in one of the messages is 20.1.1.56 with the S flag bit set to 1; the source carried in the other message is 20.1.1.57, with no S flag bit set.
    • IGMP sends only one message carrying two sources 20.1.1.56 and 20.1.1.57, with the 5 flag bit set to1.
    • IGMP sends only one message carrying two sources 20.1.1.56 and 20.1.1.57, with no S flag bit set.