[April 2018] Huawei H12-221-ENU HCNP-R&S-IERS Free Online Test

New Huawei H12-221-ENU HCNP-R&S-IERS exam questions have been released on April 16, 2018. It would be the latest Huawei H12-221-ENU exam questions and answers for your HCNP-R&S-IERS H12-221-ENU exam preparation.

Now please feel Huawei H12-221-ENU HCNP-R&S-IERS Free Online Test. HCDATEST shares 25 real exam questions with all of you. Each question values 4 Score. With HCDATEST Huawei H12-221-ENU HCNP-R&S-IERS Free Online Test, you can touch real Huawei H12-221-ENU HCNP-R&S-IERS (Implementing Enterprise Routing and Switching Network) exam.

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1. In a multicast network environment, if IGMPv1 hosts and IGMPv2 routers (hereinafter referred to as version 1 hosts and version 2 routers) are co-located on the same LAN, how do they work together? (Multiple Choice)

If there is a version 1 host in the LAN, all hosts must be required to use version 1.

Membership reports sent by version 1 hosts are always received by version 2 routers.

If a version 1 host exists in a specific group, the version 2 router must ignore any outgoing messages received in that group.

Version 2 routers must set a group-related countdown timer that considers the existence of the Version 1 host.

Question 1 of 25

2. When two routers establish a logical BGP peer through multiple physical links, you must use the peer connect-interface command.

True

False

Question 2 of 25

3. IGMPv1 contains only two message types: membership query and membership report.

True

False

Question 3 of 25

4. Which types of access control lists can be divided into? (Multiple Choice)

Basic access control list

Advanced access control list

Layer 2 ACL

User-defined ACLs

Question 4 of 25

5. The master-slave relationship of OSPF neighbors is negotiated through DD packets.

True

False

Question 5 of 25

6. When using manual link aggregation mode, the wrong description of joining member interfaces in the following is:

The Eth-Trunk interface cannot be nested. That is, the member interface cannot be an Eth-Trunk.

An Ethernet interface only can be added to one Eth-Trunk interface. If you need to join other Eth-Trunk interfaces, you must first exit from the original Eth-Trunk interface.

If the local device uses an Eth-Trunk, the peer interface directly connected to the member interface must also be bundled into an Eth-Trunk interface so that the two ends can communicate normally.

Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. The two working modes are automatically identified and no manual switching is required.

Question 6 of 25

7. Which of the following causes the BGP neighbor relationship failed to be established?

ACLs that block all TCP connections are configured between the two BGP neighbor relationships.

IBGP neighbors are non-physically connected.

BGP synchronization is enabled in the fully interconnected IBGP neighbor relationship.

The update time between the two BGP neighbors is inconsistent.

Question 7 of 25

8. About the description of P2MP networking, which is correct? (Multiple Choice)

Devices with inconsistent mask lengths on the P2MP network cannot establish neighbor relationships. However, you can use the ospf p2mp-mask-ignore command to break this limitation.

The election of DR/BDR is required in the P2MP network.

No link layer protocol is P2MP by default. P2MP must be forcibly changed by other network types.

You can use the filter-Isa-out peer command to filter the sent LSA on a P2MP network

Question 8 of 25

9. About the descriptions of LSA of various messages, which is wrong?

The DD type LSA contains only the summary information of the LSA, that is, the LS Type, LS ID, Advertising Router and LS Sequence Number.

The LS Request message contains only the LS Type, LS ID, and the Advertising Router.

The LS Update message contains the complete LSA information.

The LS Ack packet contains the complete LSA information.

Question 9 of 25

10. Which of the following description of the distribution tree is correct?

The multicast source is root, the multicast distribution tree that the multicast group members as leaves called RPT.

The RP (Rendezvous Point) is root, the multicast distribution tree that the multicast group members as leaves called SPT.

SPT applies to both PIM-DM and PIM-SM.

RPT applies to both PIM-DM and PIM-SM.

Question 10 of 25

11. When applying policy routing, which of the following descriptions are wrong? (Multiple Choice)

Apply strategy routing in the system view, in this case, strategy routing works on all packets received through this router.

Apply strategy routing in the system view, in this case, strategy routing takes effect only on packets generated locally.

Apply strategy routing in the interface view, in this case, strategy routing only affects the packets received and sent by the interface.

Apply strategy routing in the interface view, in this case, strategy routing only affects the packets received on the interface.

Question 11 of 25

12. When an operating OSPF router receives an LSA and the LSA does not exist in its link state database, how does the router handle this LSA?

The router will silently discard this LSA without returning any messages.

This LSA will be immediately flooded to other OSPF neighbors.

The LSA is installed in its own link state database, and then this LSA is acknowledged by multicast.

Check the age of the LSA to see if it expires.

Question 12 of 25

13. About the description of well-known attributes in BGP, which is correct? (Multiple Choice)

The well-known attributes are divided into two types: recognized mandatory and optional transition.

BGP must recognize all well-known attributes.

Well-known attributes are identifiled by all BGP routers and must exist in the Update message.

Well-known attributes are identifiled by all BGP routers, but it does not need to exist in the Update message.

Question 13 of 25

14. About multicast RPF check, which of the following statements is wrong? (Multiple Choice)

Multicast RPF check is not rely on unicast routing.

All multicast protocols use RPF check.

The router receives the multicast packet but fails the RPF check and discards the received multicast packet.

There are two RPF check functions. One is to prevent loops in multicast routes, the other is to prevent forwarding of redundant multicast data packets.

Question 14 of 25

15. The route injected into the BGP through the redistributed command has the Origin attribute of Incomplete.

True

False

Question 15 of 25

16. Which of the following is the characteristics of the OSPF stub area?

AS-external-LSAs can be published in the Stub area.

The route to the outside of the AS can only be based on a default route generated manually by the ABR.

Virtual connections cannot span the Stub area.

Any area can be a stub area

Question 16 of 25

17. In the static LACP mode, the correct description of the active link selection is: (Multiple Choice)

After a member interface is added to the Eth-Trunk in static LACP mode, the member interface sends the information negotiation active port about the system priority, system MAC address, interface priority, and interface number to the peer.

The higher the system LACP priority is, the higher the priority is. At both endsI of the devices, select the system with the larger LACP priority value as the active end. If the system LACP priority is the same, select the one with the higher MAC address as the active end.

The passive end device determines the activity interface based on the active end interface LACP priority and interface ID (interface number).

The interfaces selected by two-end device are inconsistent and the data can be forwarded normally.

Question 17 of 25

18. Since the AS-PATH attribute cannot be function within the AS, it is specified that the BGP router will not advertise any updates from the IBGP peer to its IBGP peers.

True

False

Question 18 of 25

19. In the RSTP protocol, the uplink port of the non-root switch has the parameter of the port identifier. The port identifier consists of two parts, they are:

One-byte port priority and one-byte port number

One-byte port priority and two-byte port number

Two-byte port priority and one-byte port number

Two-byte port priority and two-byte port number

Question 19 of 25

20. Which of the following is incorrect about the OSPF protocol?

When a router receives a Network-Summary-LSA, the router runs the SPF algorithm.

Network-LSA is used to describe the link status information of the broadcast network segment and the NBMA network segment.

Virtual connection is a virtual link that belongs to the backbone area (Area 0).

Type-4 LSA is used to describe how to reach the ASBR and contain routing and topology information.

Question 20 of 25

21. Autonomous System (AS) refers to a set of routers defined by users and using a unified routing policy.

True

False

Question 21 of 25

22. Which statements about OSPF packets are true? (Select 2 answers)

Hello packets can be sent immediately after the interface joined OSPF area.

After received LS Update packets, the router must send LSAck for confirming.

LS Update messages synchronize the link state database by sending detailed LSAs.

LS Update packets are sent only after an adjacency is established.

Question 22 of 25

23. Regarding the description of IGMPv1 and IGMPv2, the correct one is: (Multiple Choice)

IGMPv1 packet type does not include a leave member packets.

IGMPv2 packet type includes member leave packets

IGMPv1 supports universal group queries.

IGMPv2 supports only general group queries.

Question 23 of 25

24. How many types can the Hello packets of ISIS be divided into? (Multiple Choice)

Level-1 LAN IIH

Level-2 LAN IIH

Level-3 LAN IIH

P2P LAN IIH

Question 24 of 25

25. In which of the following states do BGP peers refuse to initiate or accept connection requests?

Established

Idle

Active

OpenConfirm

Question 25 of 25

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2 thoughts on “[April 2018] Huawei H12-221-ENU HCNP-R&S-IERS Free Online Test”

Dimthy - April 16, 2018 at 3:17 pm

Is this version the latest at present? Actually, I need H12-221 exam urgently.

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- admin - April 17, 2018 at 7:48 am
  
  Yes, this version is the latest, you can touch the H12-221 free online test first.
  
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