Updated Huawei H12-821_V1.0-ENU Exam Questions – Good For Passing HCIP-Datacom-Core Technology V1.0 Exam

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Begin to Test:

1. Regarding the description of network address port translation (NAP ) and network address translation only (No-PAT), which of the following statements is correct?

No-PAT supports protocol address translation at the network layer

No-PAT only supports protocol port translation at the transport layer

After NATP conversion, for external network users, all packets will only come from the same IP address

NAPT only supports protocol address translation at the network layer

Question 1 of 25

2. The command to configure the VRRP preemption delay is:

vrrp vrid 1 preempt-mode timer delay 20

vrrp vrid 1 timer delay 20

vrrp vrid 1 preempt-timer 20

vrrp vrid 1 preempt-delay 20

Question 2 of 25

3. Regarding the description of configuring the security level of the security zone of the firewall, the error is:

In the same system, two security zones are not allowed to configure the same security level

Security levels can only be set for custom security areas

Once the security level is set, it is not allowed to change

The newly created security area, the system defaults its security level to 1

Question 3 of 25

4. The configuration command for linkage between VRRP and BFD is:

vrrp vrid 1 track bfd-session session-name 1 reduced 100

bfd-session vrrp vrid 1 track session-name 1 reduced 100

vrrp vrid 1 track bfd-session-name 1 reduced 100

track vrrp vrid 1 bfd-session session-name 1 reduced 100

Question 4 of 25

5. The MAC address of a certain PC is 5489-98FB-65D8. The administrator wants this PC to obtain the specified IP address 192.168.1.11/24 from the DHCP server, so the command configured by the administrator should be:

dhcp static-bind ip-address 192.168.1.11 24 mac-address 5489-98FB-65D8

dhcp server static-bind ip-address 192.168.1.11 mac-address 5489-98FB-65D8

dhcp server static-bind ip-address 192.168.1.11 255.255.255.0 mac-address 5489-98FB-65D8

dhcp static-bind ip-address 192.168.1.11 mac-address 5489-98FB-65D8

Question 5 of 25

6. Which of the following is not the main function of NDP?

Path MTU Discovery

Neighbor Status Tracking

Duplicate address detection

Address

Question 6 of 25

7. Regarding the description of LSA header information in OSPF AS -External – LSA, which is wrong?

Link State ID indicates the destination network address

Forwarding Address is always 0.0.0.0

Advertising Router indicates the Router ID of ASBR

Net mask indicates the network mask of the destination network segment

Question 7 of 25

8. By default, on a router running IS-IS in a broadcast network, how many seconds does DIS send CSNP messages?

3.3

Question 8 of 25

9. Regarding the ABR in OSPF, which is the wrong description?

ABR cannot generate Type 3, Type 4, and Type 5 LSAs

Convert the Type 1 and Type 2 LSAs in the connected non-bone thousand areas into Type 3 LSAs and publish them to the backbone area

The Type 1, Type 2, and Type 3 LSAs in the backbone area of the ABR grid are converted into Type 3 LSAs and advertised to the connected non-bone thousand areas

There are multiple LSDBs on the ABR, and the ABR maintains an LSDB for each area

Question 9 of 25

10. Which of the following statements about OSPF protocol packets is wrong?

The header format of all OSPF packets is the same

All OSPF packet headers carry the Router-ID field

The OSPF protocol uses five types of packets to complete the transfer of routing information

OSPF packets are encapsulated in UDP packets, and the port number is 89

Question 10 of 25

11. In the IS-IS broadcast network, which multicast MAC address does the Level-1 router use as the destination address for sending IIH?

0180-c200-0000

0180-c200-0015

0100-5E00-0001

0180-c200-0014

Question 11 of 25

12. Which BGP route will send BGP neighbors without BGP path load sharing enabled?

All BGP routes learned from all neighbors

Only the best route preferred by BGP

Only routes learned from IBGP

Only routes learned from EBGP

Question 12 of 25

13. When using authentication in BGP configuration, how should it be configured?

A pair of BGP peers must use the same MD5 password

All routers in the AS must use the same password

All BGP peers on a router must use the same password

All routers in the same AS must use the same password

Question 13 of 25

14. There is a message in the BGP protocol that is periodically sent between BGP neighbors to maintain the neighbor relationship. This message is:

Update

Hello

open

Keepalive

Question 14 of 25

15. Regarding the description of the summary automatic command and BGP aggregation, the error is:

This command is used to implement automatic aggregation, and its priority is higher than manual aggregation

After configuring this command, BGP will aggregate routes according to natural network segments

This command is used to enable automatic aggregation of locally imported routes

After configuring this command, BGP only sends the aggregated route to the peer

Question 15 of 25

16. Will setting the Community attribute of the route through the routing policy affect the route selection?

It can be indirectly affected. By setting the Community attribute of the route, the route can be classified, and then set different route selection-related attributes according to the category, such as Local_Pre, MED, etc., to achieve the purpose of affecting route selection

It cannot be affected, because the Community attribute of the route is a non-transitional attribute and cannot be passed between routers

It can be affected indirectly. By setting the Community attribute of the route, the route can be classified, and then different attributes related to route selection can be set according to the category. These attributes only include Loacal_Pre and MED, so as to achieve the purpose of affecting route selection.

After the router receives the routing update whose Commmity attribute is No_ Advertise, it will not advertise it outside the local AS.

Question 16 of 25

17. Regarding the description of the routing tool, which of the following statement is wrong?

route-policy can only match routes and data packets, and cannot be used to modify routing attributes or data packet forwarding behavior

Prefix list (ip-prefix) matching object is the destination address of routing information

The access control list (ACL) is used to match the IP routing information or the address of the data packet

as-path-filter is used to match the AS-PATH attribute in BGP routing information, so it can only be used to filter BGP routes

Question 17 of 25

18. Which of the following statements about the address used by AC to establish a CAPWAP tunnel in VRRP hot backup is correct?

The physical address of the primary AC

The physical address of the standby MC

Any address configured in the AC is fine

VRRP virtual addresses of the active and standby ACs

Question 18 of 25

19. The default priority of the VRRP device in the backup group is:

200

150

100

Question 19 of 25

20. Regarding the special area of OSPF, the wrong description is:

Totally Stub Area allows the ABR to advertise the default three-type LSA, but does not accept five-type LSA and refined three-type LSA

The difference between the NSSA Area and the Stub area is that this area allows the introduction of external routes of the autonomous system, and the ABR issues an LSA7 advertisement to this area

The difference between the Stub Area and the Totally stub area is that the Stub area allows fine-grained routing information between areas.

The difference between the Totally Stub area and the NSSA area is that the Totally Stub area does not accept inter-domain routing information

Question 20 of 25

21. About the description about the OSPF calculating the shortest path tree stage, which is the correct?

The first stage calculates the Stub network segment, and the second stage calculates the router node and Transit network segment.

The first stage calculates routing nodes and Transit network segments, and the second stage calculates Stub network segments.

The first stage calculates the stub segment, and the second stage calculates the routing node.

The first stage calculates the routing nodes, and the second stage calculates the Stub network segment.

Question 21 of 25

22. Regarding the description of IGMP Snooping-working mechanism, which is the correct?

The layer 2 switch establishes and maintains the PIM routing table on the layer 2 by continuously monitoring IGMP messages.

When IGMP Snooping is not running, the multicast message will be broadcast on the second layer. After running IGMP Snooping, the message will no longer be broadcast on the second layer, but will be multicast on the second layer.

If the host sends an IGMP leave message, the switch will add the host to the corresponding multicast table.

If the host sends an IGMP host report message, the switch will delete the multicast entry corresponding to the host

Question 22 of 25

23. There are the following states in the BGP neighbor establishment process, then the state machine sequence that a successful connection goes through is:
1. Active
2. OpenConfirm
3. Idle
4. Establish
5. OpenSent

3-1-2-5-4

1-3-5-2-4

3-5-1-2-4

3-1-5-2-4

Question 23 of 25

24. Which of the following description of OSPF neighbor relationship and adjacency relationship is correct?

The adjacency relationship is maintained by OSPF DD packets

OSPF routers must establish an adjacency before exchanging Hello packets

The neighbor relationship is selected from the adjacency relationship and formed to exchange routing information

Not all neighbor relationships can be adjacencies

Question 24 of 25

25. Regarding the description of the Hello message in PIM-SM, the error is:

The routers periodically use Hello messages to keep in touch

In the PIM-SM network, the newly started multicast router needs to use Hello messages to discover neighbors and maintain neighbor relationships

Hello packets are sent to the multicast address 224.0.0.5

Elect DR in multi-router network segment through Hello message

Question 25 of 25

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