Updated H12-821_V1.0-ENU Exam Questions (1263 Q&As) – Latest Study Materials for HCIP-Datacom-Core Technology V1.0 Exam Preparation

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Begin to Test:

1. 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 1 of 40

2. 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 2 of 40

3. Which of the following descriptions about OSPF default routing is wrong?

The OSPF default route can be issued by the Area Border Router (ABR) to issue Type 3 default LSAs to guide routers in the area to forward packets between areas

When the router has no exact matching route, it can forward the message through the default route

Due to the hierarchical management of OSPF routes, the priority of class 5 and class 7 default routes is higher than that of class 3 default routes

Autonomous System Boundary Router (ASBR) publishes default LSA of type 5 or default LSA of type 7, which is used to guide routes in the autonomous system (AS) to access the outside of the autonomous system

Question 3 of 40

4. 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 4 of 40

5. 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 5 of 40

6. Which function does the switch control plane not include?

Business processing

Routing operation

System loading

Traffic Statistics

Question 6 of 40

7. 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 7 of 40

8. What are the key components of building an IP wide-area bearer network solution together with Huawei NetEngine intelligent routers?

iMaster NCE-Fabric

iMaster NCE-IP

iMaster NCE-Campus

iMaster NCE-WAN

Question 8 of 40

9. Which of the following does not belong to IGP?

RIP

IS-IS

BGP

OSPF

Question 9 of 40

10. 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 10 of 40

11. Which of the following descriptions about configuring roaming groups is wrong?

After the AC is enabled with the Master Controller function, it joins the roaming group by default and can manage other ACs

Master Controller is a logical role that can be assumed by any common entity AC

Member ACs need to designate an AC as their own Master Controller

The Master Controller manages each AC through the CAPWAP tunnel

Question 11 of 40

12. In SSM, which version of IGMP needs to be used?

IGMPv1

IGMPv3

IGMPv2

IGMPv4

Question 12 of 40

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

200

150

100

Question 13 of 40

14. The filter-policy 2000 export is configured in the IS-IS process server-group-AP, which statement about the function of this command is wrong?

It needs to be used in combination with route import, so that only part of the imported external routes can be advertised to neighbors

This command will filter the link state information published externally

If this command is not configured, the device will advertise all the routes imported to S-IS by the external routing protocol by default.

It will restrict the publishing of routing entries generated by the device itself

Question 14 of 40

15. When performing source NAT configuration and having no-pat configuration parameters, which of the following statements is correct?

Only the destination IP address is translated

Simultaneous source IP address and source port translation

Only source IP address translation is performed

Perform destination IP address and destination port translation

Question 15 of 40

16. During the operation of the DHCP protocol, the process from when the client applies to obtain an IP address is:
① The host sends a DHCP Request to request an IP address
② Server sends DHCP Offer message response
③ The host sends a DHCP Discover message to find DHCP
④ Server 4 Server responds with ACK response request after receiving the request

③-②-①-④

①-②-③-④

①-④-③-④

③-④-①-②

Question 16 of 40

17. Which of the following description of how to establish a BFD session is wrong?

BFD sessions can only be established dynamically

Static configuration of the BFD session refers to configuring the BFD session parameters through the command line, including local identifiers and remote identifiers, etc.

When dynamically establishing a BFD session, dynamically assign a local identifier.

The system distinguishes between static BFD sessions and dynamic BFD sessions by dividing the identifier area.

Question 17 of 40

18. Which of the following description about the prefix list is wrong?

The prefix list can match the prefix number and prefix length

The prefix list can be used for packet filtering

The prefix list can be used to filter IP prefixes

The prefix list has a stronger matching function for routing masks than the access control list

Question 18 of 40

19. Which of the following descriptions about OSPF route aggregation is incorrect?

Any router in OSPF can perform route aggregation operations.

OSPF has two route aggregation methods: ABR aggregation and ASBR aggregation

Route aggregation refers to aggregating routing information with the same prefix and publishing only one route to other areas.

Through route aggregation, routing information can be reduced, thereby reducing the size of the routing table and improving router performance.

Question 19 of 40

20. Which of the following scenarios is the SD-WAN solution suitable for?

Enterprise branch interconnection

Internal interconnection of enterprise data center network

Enterprise campus wireless network deployment

Question 20 of 40

21. Among the matters needing attention in configuring the Stub area, the correct description is:

The virtual connection can pass through the stub area

If an area is configured as a Stub area, all routers in the area must be configured with Stub area attributes

The backbone area can be configured as a stub area

ASBR can exist in the Stub area

Question 21 of 40

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

3.3

Question 22 of 40

23. ACL command ac1 [number] ac1-number [ match-order {autol config}], where ac1-numnbe is used to specify the number of the access control list, and the value range of ac1-number of the basic access control list is ().

1000~3999

0~1000

3000~3999

2000 ~2999

Question 23 of 40

24. Which of the following tools cannot be directly referenced by the apply clause of a route-policy?

IP-Prefix

tag

community

origin

Question 24 of 40

25. When a stateful inspection firewall forwards subsequent data packets (not the first packet), which of the following is mainly based on?

Route table

OFIB table

MAC address table

Session table

Question 25 of 40

26. Which of the following descriptions about the Keepalive message in BGP is wrong?

Keepalive messages are mainly used to maintain the connection between BGP peers

The Keepalive message contains only one BGP data header

By default, the Keepalive interval is 180 seconds

Keepalive messages are periodically sent between two BGP neighbors

Question 26 of 40

27. 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 27 of 40

28. 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 28 of 40

29. 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 29 of 40

30. Regarding the description of the summary automatic command and BGP aggregation, which is wrong?

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 30 of 40

31. Which of the following descriptions about setting Community through routing policies to affect routing selection is wrong?

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 31 of 40

32. Regarding the default routes of each protocol, which of the following description is wrong?

BGP can deliver default routes

ISIS can issue default routes

OSPF cannot deliver the default route

Static default routing can be configured

Question 32 of 40

33. 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 33 of 40

34. In a broadcast network, what is the default interval for sending Hello by DIS?

10s

40s

3.3s

Question 34 of 40

35. Which of the following does not include the switch role in the stack system?

Main switch

Candidate switch

Slave switch

Standby switch

Question 35 of 40

36. Which of the following tools is used to filter routing information and set routing attributes for filtered routing information?

route-policy

as-path-filter

policy-based-route

IP-prefix

Question 36 of 40

37. Regarding LSA3, LSA4 and LSA5, which of the following description is correct?

LSA5 will not change after passing through different areas, but LSA3 will change

LSA3, LSA4 and LSA5 will not change after passing through different areas

LSA3 will not change after passing through different areas, but LSA4 and LSA5 will change

LSA4 will not change after passing through different areas, but LSA3 and LSA5 will change

Question 37 of 40

38. Which of the following does not include the advantages of address translation technology?

Address translation allows internal network users (private IP addresses) to easily access the Internet

Address translation can shield users on the internal network and improve the security of the internal network.

Address translation can enable many hosts in the internal office network to share a P address for accessing the Internet.

Address translation can handle the case of IP header encryption

Question 38 of 40

39. 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 39 of 40

40. Which of the following description about OSPF is correct?

OSPF LSA is regularly updated every 30 minutes

OSPF floods an LSU every 5s

OSPF uses the Bellman-Ford algorithm, and each router runs the algorithm independently.

OSPF itself has no confirmation mechanism, so 0SPP relies on the lower layer protocol, namely TCP confirmation.

Question 40 of 40

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