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Practice Free H12-221 HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) Exam Questions Answers With Explanation

We at Crack4sure are committed to giving students who are preparing for the Huawei H12-221 Exam the most current and reliable questions . To help people study, we've made some of our HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) exam materials available for free to everyone. You can take the Free H12-221 Practice Test as many times as you want. The answers to the practice questions are given, and each answer is explained.

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Question # 6

What is the maximum number of hosts that a network segment 192.168.2.16/28 can support?

A.

16

B.

8

C.

15

D.

14

E.

7

Question # 7

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

A.

BGP peers must be manually configured.

B.

A TCP connection must be established between two neighboring routers.

C.

BGP peers must exchange routing information.

D.

MD5 authentication must be configured between BGP peers.

Question # 8

How many hosts can the network 154.27.0.0 support, if not subnetted?

A.

254

B.

1024

C.

65,534

D.

16,777,206

Question # 9

How does community attribute of the BGP route set by routing policies affect route selection?

A.

The Community attribute directly affects route selection because it must be compared during the route selection process.

B.

The Community attribute does not affect route selection because it is non-transitive and cannot be transmitted between routers.

C.

Routes are classified by the Community attribute which indirectly affects route selection. Different route attributes such as the Local-Preference and MED values can be set for routes in different communities.

Question # 10

Given a Class B network 155.16.0.0 with the mask 255.255.255.192, what is the maximum number of subnets that can be created, and what is the maximum number of hosts available within each created subnet?

A.

512 126

B.

1024 64

C.

1024 62

D.

256 254

E.

192 254

Question # 11

Which of the following statements regarding multicast MAC addresses are true (Select 3 answers)

A.

The high-order 24 bits of a multicast MAC address are 0x01005e while the low-order 23 bits of a multicast MAC address are the low-order 23 bits of a multicast IP address.

B.

One multicast MAC address can map 32 different IP multicast addresses.

C.

Multicast MAC addresses are used in the link layer to identify receivers that are in the same multicast group.

D.

One multicast MAC address can map only one IP multicast address.

Question # 12

ABR of a Stub area does not flood Type-5 and Type-4 LSAs into the area. Therefore, the Stub area does not have the external AS routing capability. ABRs of the Stub area generate a default route into the area which enables packet forwarding to external destinations.

A.

TRUE

B.

FALSE

Question # 13

Assume that the subnet mask is 255.255.255.248. Which of the following are valid host addresses? (Select 3 answers)

A.

192.168.200.87

B.

196.123.142.190

C.

223.168.210.100

D.

220.100.100.154

Question # 14

Enabling MD5 authentication between BGP peers can prevent DoS attacks that target BGP peers.

A.

TRUE

B.

FALSE

Question # 15

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

A.

TRUE

B.

FALSE

Question # 16

What does an IP address of 0.0.0.0 indicate?

A.

Network address

B.

Broadcast address of specially designated network segment

C.

All networks

D.

Broadcast address of all nodes of local network segment

Question # 17

IGP routes can be installed into the BGP routing table by running either the network or import-route command.

A.

TRUE

B.

FALSE

Question # 18

Which of the following multicast protocols can generate multicast distribution trees?

A.

MBGP

B.

MSDP

C.

IGMP

D.

PIM

Question # 19

Which of these addresses are reserved for use by multicast applications?

A.

Class A

B.

Class B

C.

Class E

D.

Class D

Question # 20

In a route-policy, which BGP attributes can be used to define apply clauses? (Select 3 answers)

A.

Local-Preference

B.

Tag

C.

Origin

D.

AS-Path

Question # 21

ACLs can match routing information or data packet addresses to filter unmatched routing information or data packets.

A.

TRUE

B.

FALSE

Question # 22

What are the functions of an IGMFV2 Query message? (Select 3 answers)

A.

A router sends IGMPv2 Query messages to collect group memberships of receiver hosts.

B.

A router sends IGMPv2 Query messages to elect a querier.

C.

A working router sends Query messages periodically.

D.

Based on IGMPv2 Query messages, receiver hosts can unicast Report messages to the querier by obtaining its address.

Question # 23

An IP address 192.168.13.175 with the subnet mask 255.255.255.240 can be assigned to a device.

A.

TRUE

B.

FALSE

Question # 24

A Router ID is optional in the OSPF configuration.

A.

TRUE

B.

FALSE

Question # 25

If the subnet mask for Class A address is 255.255.240.0, how many bits are used for subnetting?

A.

4

B.

5

C.

9

D.

12

Question # 26

Which types of packets are supported by BGP? (Select 3 answers)

A.

Hello

B.

Notification

C.

Update

D.

Route-refresh

Question # 27

The peer connect-interface" command is recommended to establish peer relationships between two routers connected through "multiple" links.

A.

TRUE

B.

FALSE

Question # 28

We can prevent a router from ever becoming a DR or BDR by configuring an OSPF Priority of zero,

A.

TRUE

B.

FALSE

Question # 29

Which of the following BGP filters can be used to set route attributes?

A.

Ip-prefix

B.

Route-policy

C.

As-path-filer

D.

Community-filter

Question # 30

Which of the following statements are correct regarding OSPF intra-area route calculation? (Select 2 answers)

A.

Each OSPF router uses only one Router LSA to describe the local active link state for an area.

B.

Each OSPF router uses more than one Router LSA to describe local active link state for an area.

C.

One Router LSA describes only one link,

D.

One Router LSA describes more than one link.

Question # 31

Which of the following IP addresses can be used on a public network? (Select 2 answers)

A.

172.30.0.1/16

B.

127.254.11.15/16

C.

172.15.12.7/16

D.

193.168.10.4/16

Question # 32

The ABR of an NSSA does not advertise Type-4 and Type-5 LSAs to an NSSA instead it imports external routes into the NSSA,

A.

TRUE

B.

FALSE

Question # 33

Which statement about OSPF is false?

A.

Hello messages are used as a form of greeting to discover other routers on its networks and establish relationships between neighboring devices. On broadcast or NBMA networks, Hello messages can also be used to elect a DR or a BDR.

B.

DD packets describe the summary LSDB information by carrying LSA headers.

C.

The intervals at which two routers send Hello messages must be consistent; otherwise, cannot be established relationships between neighboring devices.

D.

DD packets contain headers of all LSAs for periodic LSDB synchronization between OSPF neighbors.