H12-223_V2.5-ENU Online Training Archives

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1. Enterprise networks often use DHCP to allocate IP addresses to users. Compared with static address allocation, DHCP address allocation greatly reduces the workload of network address management.

True

False

2. Which of the following troubleshooting methods instead of using the TCP/IP reference model as a theoretical basis?

Comparative configuration method

From top to button method

Bottom-up method

Replacement method

3. Determining the project team members is the work content of the implementation phase.

True

False

4. Which of the following reasons may lead to the MSTP protocol in LAN does not work? (Multiple Choice)

MSTP configuration error

The physical link oscillates, triggering the device to send many TC packets

Enable MSTP device to receive the client or pass-through of MSTP TC messages

The priority of the unconfigured port in the specified spanning tree instance

5. Regarding the gathering information stage in the processing of the troubleshooting in the structured network, which of the following items need to focus on? (Multiple Choice)

What information needs to be collected

How to collect the information

Whether authorization is required

Risk assessment at the information gathering stage

6. Huawei's enterprise network management products are the eSight, and is divided into three versions: Starter Edition, Standard Edition, and, Professional Edition. Compared with the Standard Edition, what are the main characteristics of the following are added in the Professional Edition?

Professional Edition provides database backup tools

Support multi-user management

Support WLAN, MPLS VPN management

Support hierarchical management model

7. Which of the following options is the work that needs to be done at the project planning stage? (Multiple Choice)

Determine the technical plan

Understand the project background

Choose network products

Determine project requirements

Plan IP address

8. In a complex network environment with financial, OA ( Office Automation System , Office Automation), production, and even more business systems, which of the following should be first concerned during the network troubleshooting?

Assignment of IP address

Model of network equipment

Data flow direction of each business system

The environment of the computer room

9. In what occasions is the " looping " test generally used?

Test whether the application can connect normally

Test whether the routing protocol can effectively avoid loops

Test whether the switch can effectively carry out loop containment and broadcast containment

Test whether the physical circuit is interrupted

10. As an effective security mechanism, DHCP SNOOPING can prevent which of the following attacks? (Multiple Choice)

Prevent DHCP spoofing attacks

Prevent DOS attacks on the DHCP server

Prevent MAC address flooding attacks

Combine the DAI function to check the source MAC address of the data packet

Combine the IPSG function to check the source IP address of the data packet

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11. Which of the following is the key to network design?

Innovation of key technologies

Selection of equipment lines and other elements

Improve performance at a reasonable cost

Ensure that the network is stable and reliable

12. Enterprises in order to improve the reliability of the interconnection of exports, often use the method of a plurality of links connecting different operators. When using this method, you need to focus on the flow path of the outgoing direction and incoming direction, or may affect the quality of the network.

True

False

13. Project acceptance as long as party A and Party B are present, no third party involved.

True

False

14. Optical power is generally used DBM represented, which of the following DBM is the current most optical transceiver device to receive and identify data?

-30DBM

-10DBM

10DBM

30DBM

15. When the network administrator tries to access the internal network devices through telnet, found it impossible to access. Which of the following is least likely reason?

The route is unreachable, and the client and server cannot establish a TCP connection

The number of users logging in to the device has reached the upper limit

ACL is bound to the VTY user interface

VTP user interface is configured with protocol inbound all

16. Ethernet is a network supporting broadcast network, once the network has a loop, this simple broadcast mechanism will lead to disastrous consequences. Which of the following phenomena may be caused by loops? (Multiple Choice)

The device cannot log in remotely

When using the DISPLAY INTERFACE command on the device to view the interface statistics, it is found that the interface has received many broadcast-packets

CPU usage exceeds 70%

Severe packet loss during network testing through the PING command

17. Which device of the following is forwarding data based on the MAC address of data frames?

HUB

Bridge

Router

Firewall

18. During the inspection of operation equipment, which of the following statements is correct?

You can check the memory usage of the device by executing the display memory-usage command. If "Memory Using Percentage Is" exceeds 80%, you need to pay special attention currently.

You can check the running status of the board by executing the display device command, the “Online” of the board should be “Present”

You can view the fan status by executing the display fan command. When the Present item is NO, it means normal

You can view the FTP network service port by executing the display ftp-server command, and the unused FTP network service port needs to be recorded

19. Which of the following link can run the PPP protocol but cannot run the HDCL protocol? (Multiple Choice)

ATM

ISDN

MSTP

PSTN

20. The event marking the end of the network planning phase is:

Project establishment

Issuing bids

Contract signing

Project preliminary inspection

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21. Project ranges may be defined in terms of three aspects, which of the following are not included?

Functional boundaries

Coverage area

Investment quota

Engineering boundary

22. When the DHCP client and DHCP server exists the device, if the IP address of the DHCP server global address pool and the IP address on the VLANIF interface of client connecting on a relay device is not in the same network segment, it will cause DHCP failure.

True

False

23. In the current Internet access market, the FTTH (Fiber To The Home) is mainly popularize, which of the following technology will be mainly used by FTTH?

GPON/EPON

XDSL

FTTH

HFCs

24. About description of IP address assignment, which of the following is correct? (Multiple Choice)

Unless AnyCast is used, the IP address of the entire network must remain unique

IPv4 address space is divided into three categories: A, B, and C

When assigning addresses, if the /24 -bit mask length is used uniformly, the network design can be simplified

In order to improve the efficiency of the use of IP addresses, we generally use VLSM and determine the mask length as needed

25. The high-risk operation plan is generally approved and finalized one day before implementation.

True

False

26. Layer 2 network architecture compared with the Layer 3 network architecture, with a simple structure, high efficiency advantages of data forwarding, so the future network structure will be fully turned to a Layer 2 network architecture, Layer 3 network architecture will be phased out.

True

False

27. Which of the following belong to the sub-process or stage of the structured network troubleshooting process? (Multiple Choice)

Comparison configuration

Report failure

Reasons list

Investigate one by one

28. In the network design, we can provide higher reliability for business customers through a network of redundant topology selection, which of the following topological structure can provide with redundancy? (Multiple Choice)

Star topology

Ring topology

Bus topology

Double star topology

29. Currently, which of the following architecture is the mainstream use of switches ？ A. Bus type

B. Shared memory type

C. Switching matrix

D. Distributed

E. CLOS architecture

30. Network Optimization major work content does not include:

Hardware optimization

Software optimization

Network expansion

Replace the computer room air conditioner

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31. Which of the following is the source of demand for network optimization? (Multiple Choice)

After long-term network maintenance, some summarized problems and improvement points, put forward relevant suggestions, and carry out centralized rectification

Video conferencing services need to be carried out in the network, and switching equipment supporting Layer 2 multicast functions needs to be added

The environmental problem of a weak current well, the signal line is seriously aging, and needs to be replaced collectively

For corporate information security needs, add new security equipment

32. The current internal corporate networks often use private IP addresses to communicate, then which of the following addresses belong to private IP addresses?

0.1.1.1

127.5.4.3

128.0.0.5

172.24.35.36

231.33.24.35

33. What are the main difficulties of cutover? (Multiple Choice)

Minimize the scope that affects the business

Do the best in risk avoidance

Develop a complete cutover plan

Smoothly execute cutover

34. In order to save the cost of equipment, the position of the network monitoring optimization can be a network outlet, server interface, the key link.

True

False

35. S7700 and S9700 are both Huawei's modular campus switches. Compared with S7700, S9700 has the characteristics as follows:

S9700 switches provide more slots and more ports

S9700 switches provide non-blocking data exchange capabilities

S9700 provides provide redundant engines, redundant power supplies and redundant fans

S9700 switches provide data center features such as TRILL ratio and FCOE

36. When troubleshooting the EBGP neighbor relationship faults, you find two directly connected devices use LOOPBACK port to establish a connection, so execut the DISP; AY-CURRENT CONFIGURATION CONFIGURATION BGP to view PEER EBGP-MAX-HOP HOP- COUNT configuration, which of the following statements is correct?

hop-count must be greater than 1

hop-count must be greater than 2

hop-count must be greater than 15

hop-count must be greater than 255

37. During the software and configuration backup, which of the following statements is correct?

To back up the software version, and the same product, the same version should be backed up multiple times

License does not need to be backed up

After the configuration of the device is changed, there is no need to back up the configuration file

The purpose of backup is to restore network functions in extreme cases

38. Regarding the description of the OSPF neighbor relationship faults, which of the following statement is incorrect?

Stuck in the ExStart state indicates that the MTU between neighboring routers does not match or the OSPF RID (Router ID) is duplicated

For non-DR/BDR routers on the Ethernet link. It is acceptable to be stuck in a 2-way state

Stuck in the Init state indicates that the router has received the Hello message from the neighbor, but the Hello message does not contain the OSPF RID (Router ID) of the receiving router

Stuck in the Attempt state indicates that the router does not send unicast Hello packets to the configured neighbors

39. Coaxial cable typically used to carry video signals, data signals cannot be carried

True

False

40. When checking service running status, which of the following statements is correct?

When checking the multicast forwarding table information, you can execute the display multicast forwarding-table command to view the Layer 2 multicast forwarding table entries

When checking the multicast routing protocol, you can view the multicast routing table by executing the display multicast routing-table command. If the intra-domain multicast routing protocol uses PIM-SM, then the interfaces connected to the multicast do not need to enable IGMP

When checking VRRP state, by performing display vrrp and display vrrp statistics command to view, "State" should be "Initailize" state

When checking the anti-attack detection configuration, you can execute the display current-configuration | include car command, and there should be anti-attack configuration. If it is not configured, use the car command to configure the anti-attack function for the device

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41. The purpose of the organization cutover started coordination is mainly for good customer communication and project information, and communicate with other parties is not very important.

True

False

42. Which of the following is the event that no need the customer's signature in the cutover project?

Finalized cutover plan

Change application form

Change reminder

Cutover completion report

43. What are the reasons below may cause IS-IS fault neighbor relations? (Multiple Choice)

The device at both ends of the link is configured with the same System ID

IS-IS Levels at both ends of the link do not match

When establishing IS-IS Level-1 neighbors, the area addresses of the devices at both ends of the link do not match

The IP addresses of the interfaces on both ends of the link are not in the same network segment

44. Industry background to understand what the project can grasp the following information ?

Industry conventional solutions

Problems to be solved by the project

Client's organizational structure

Implementation scope of the project

45. Cutover exactly which comprises three steps.

Snapshot before cutover

Issued during cutover

Check after cutover

Defend the game after cutover

46. On Monday morning, you received a phone call at the office seat, an employee said he could not through the PC to access the Internet, you want to get technical support. So you use the ping command on his PC to test, and use the tracert command to see where the packet is lost.

Which of the following methods of network troubleshooting belong to ?

Comparative configuration method

Bottom-up approach

Confirm business traffic path

Self-term down method

47. In the layer 2 switching network, the device forwards data based on the MAC address, so the data can be filtered according to the MAC address. Therefore, the firewall running in transparent mode cannot filter the layer 3 information of the data packet.

True

False

48. When unpacking and inspecting the goods, what content needs to be checked on the packing list ？ (Multiple Choice)

Part code

Part model

Number of parts

Project name

49. When configuring the DHCP Relay function on the device, the VLANIF interface connecting the relay to the client must be bound to the DHCP server group, and the binding DHCP server group must be configured with the proxy DHCP server IP address.

True

False

50. What are the main difficulties in cutover? (Multiple Choice)

Minimize the scope of business impact

Do the best in risk avoidance

Develop a complete cutover plan

Profit execution cutover

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51. When a structured network troubleshooting process is used for troubleshooting, the results are predictable, and the impact of the troubleshooting process is controllable, and no new risks will be introduced.

True

False

52. Two hosts are connected to the same switch and belong to the same VLAN and the same network segment. Now the two hosts cannot ping each other. Which of the following is the possible cause ？ (Multiple Choice)

The host is configured with incorrect static ARP

Port isolation is configured on the switch

The interface is manually shut down or the physical interface is damaged

Wrong port and MAC address binding is configured on the switch

53. In the preliminary analysis of the cutover project, which of the following aspects should be considered? (Multiple Choice)

Necessity

Feasibility

Risk

Cost

54. When troubleshooting the network, you find that there may be a problem with the OSPF configuration on a certain router, but when you log in to the network device to check the OSPF configuration, you find that the OSPF and BFD linkage configuration is also wrong, so you modify the configuration of OSPF and BFD.

The network troubleshooting method belongs to which one of the following?

Block method

Comparative configuration method

Segmentation method

Bottom-up approach

55. What are the main tasks in the acceptance phase of cutover? (Multiple Choice)

Transfer of data

Transition training

Acceptance meeting

Accounting for business expenses

56. Which of the following steps or measures belong to the troubleshooting phase of the structured network troubleshooting process? (Multiple Choice)

Emergency plan

Preparation for rollback

Temporary environment construction

Information filtering

57. Which of the following aspects should be considered in the cutover risk assessment? (Multiple Choice)

Key locations of risk points

Scope of risk impact

Time of risk impact

Loss caused by risk

58. Enterprise business often has strict requirements on network service quality. Which of the following aspects are commonly used to describe network service quality? (Multiple Choice)

Stable

Bandwidth

Delay

Jitter

Security

59. Solve the fault

1->2->3->6->4->5->7

1->2->3->6->5->4->7

2->1->3->5->6->4->7

2->1->5->3->4->6->7

60. Cutover rollback refers to roll back the current changes to the state before execution.

True

False

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61. A user reported that he could not receive emails through the email client. What are the possible reasons? (Multiple choice)

The user does not have corresponding permissions

Mail server failure

Link failure

User client setting error

62. In the judgment and analysis stage of the structured network troubleshooting process, as long as the failure information, maintenance information, and change information are summarized, a list of causes of network failures can be obtained.

True

False

63. Which of the following WAN links belong to the message switching network? (Multiple choice)

ATM

ISDN

MSTP

PSTN

64. Which businesses in the enterprise usually need to optimize the user experience? (Multiple choice)

Video surveillance business

Video conferencing business

Voice phone service

Network management business

65. The essence of SDN is to build a centralized brain for the network, and achieve the optimal global traffic through a global view and centralized control.

True

False

66. Which of the following parameters do we generally use to measure the performance of the switch? (Multiple choice)

Port density

CPU frequency

Exchange capacity

Packet forwarding rate

MAC table capacity

Port rate

67. What are the main contents of the cutover project plan? (Multiple choice)

Cutover preparation

Cutover implementation

Rollback plan

Emergency plan

68. Regarding the use of the network management system, which of the following options are correct? (Multiple choice)

The network management software has an alarm management function. For example, the UP/DOWN changes of the device port can be immediately fed back to the network management software through TRAP messages, so that the network administrator can discover and deal with network faults in time

The network management software has a performance management function. The network management software can automatically collect and count the points and rates of the device's CPU and memory, and can assist the network administrator to analyze the network performance bottleneck.

The network management software has a configuration file management function, which can perform automatic backup, comparison, and restoration of configuration files, so that network administrators can automatically back up configuration files in batches

The network manager can regularly output reports according to user needs to provide reference for later network optimization

69. When troubleshooting a network, if you need to confirm the business traffic path, which of the following tasks may be required? (Multiple choice)

Confirm the data link layer service traffic path

Confirm the network layer business traffic path

Investigate business traffic path planning in the network design stage

Confirm the frequency of failure

70. When upgrading the equipment software, which statement about the operating window time is wrong?

Determined by the user's service interruption time

The time must be greater than the execution time of the upgrade operation

Allow a certain amount of time for troubleshooting

The operating window time only needs to be notified to the network maintenance personnel, not to the user.

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71. When troubleshooting a network fault, you locate the fault location on a router. This router and another router in the network are mutually redundant. Then which of the following troubleshooting methods is most suitable?

Comparative configuration method

Bottom-up approach

Confirm business traffic path

Top-down method

72. Which of the following is not an external risk of the project ？

Exchange rate changes

Heavy rain

Social unrest

Differences in industry standards

73. For the purpose of optimizing access security, which of the following is the most appropriate ？

Ensure that sensitive management information is not stolen illegally

Prevent and reduce external network attacks and harm

Ensure the access security of key business

Realize user's secure access control

74. After replacing the twisted pair, the user finds that he cannot access the network. In this case, which troubleshooting method is most appropriate?

Comparative configuration method

Top-down method

Bottom-up approach

Replacement method

75. The biggest difference between fat AP and thin AP is that fat AP can access more users, provide higher performance, and is more suitable for large-scale company networking.

True

False

76. Which of the following is not an operation to verify the cutover plan?

Set up an experimental bureau for testing

Technical review by all parties

Original factory expert review

Risk prediction

77. Which of the following different types of line interfaces is not in the same category as the others?

BNC interface

FC interface

LC interface

SC interface

78. The current switches all run the MSTP protocol by default, so in the description of the default state, which of the following options is correct?

All switches run in the same region by default

The calculation speed of STP is faster than when multiple instances are configured

Because of lack of configuration, all switches will switch the operating mode to RSTP

Each switch runs in an independent region

79. Regarding the cause of the dual-master failure of the VRRP backup group, which of the following is the most unlikely

The VRRP backup group configurations on both ends are inconsistent

The link that transmits the VRRP notification message is faulty

The low-priority VRRP backup group discards the received VRRP notification packets as illegal packets

Master device sends 1 notification message per second

80. In the finishing work of the structured network troubleshooting process, which of the following are the documents that need to be handed over ？ (Multiple choice)

Troubleshooting process documentation

Troubleshooting summary report

Change backup and maintenance recommendations

User communication plan

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81. The current Huawei firewall product USG6X00 series is a UTM firewall product. While supporting stateful inspection packet filtering, it also supports functions such as intrusion detection, anti-virus and URL filtering.

True

False

82. If the network transformation in the project will affect the business running on the existing network, then the implementer needs to formulate strict implementation process specifications and risk avoidance measures. We generally define this type of project as a cutover project.

True

False

83. You use a Huawei router as an SSH client to log in to another Huawei router, but the login fails.

You suspect that it may be a configuration error on the SSH server. When checking the cause of the server configuration failure, which of the following is the most unlikely?

The SSH protocol is not bound to the VTY interface of the user interface

User service type, authentication type, user authentication service type are not configured

The server and client SSH versions are inconsistent

SSH first authentication function is not enabled

84. Regarding the purpose of managing security optimization, which of the following is the most appropriate?

Ensure that sensitive management information is not stolen illegally

Prevent/reduce external network attacks and harm

Ensure the access security of key business

Realize user's secure access control

85. During the unpacking inspection, Xiao Wang found that the appearance of the device was not damaged, and all the modules of the device were operating normally when the device was powered on for the first time, but after 24 hours of continuous operation, the board failed, then This situation is not eligible for the DOA process.

True

False

86. When troubleshooting VRRP backup group flapping, you execute the vrrp vrid timer advertise command on the router to increase the interval between VRRP packets, and then repeatedly execute the display vrrp command on the Backup device to view the State field, and you find that the displayed information is always Keep it unchanged, which of the following descriptions is correct regarding the above operations?

The state of the Backup device may fluctuate because the interval between sending VRRP packets is too small.

The state of the Backup device may fluctuate because the interval between sending VRRP packets is too long.

The oscillation of the backup device status has nothing to do with the interval between VRRP packets.

The cause of the failure is not found, and the time interval needs to be restored.

87. When troubleshooting MSTP, you executed the DISPLAY CURRENT-CONFIGURATION command to obtain the configuration file of the device. Which of the following statements is wrong?

Check the port configuration and confirm whether the MSTP-enabled port is enabled with the protocol message sending command, such as: BPDU ENABLE

Whether the MSTP port connected to the user terminal device is disabled or configured as an edge port

No matter whether the BPDU TUNNL is configured on the device, it will not affect MSTP

Check whether the device port is added to the correct VLAN

88. After the project is delivered, operation and maintenance costs will continue to be incurred. Which of the following items are costs incurred during operation and maintenance? (Multiple choice)

Energy costs

Route suggestion fee

Line rental fee

Equipment depreciation expenses

Staff costs

89. When selecting equipment, Xiao Wang needs to choose a Layer 3 switch with 100M interface from a series of campus switches provided by Huawei. Then which series of switches should he choose?

S2700

S3700

S5700

S6700

90. Ethernet is currently the most mainstream local area network. What factors usually need to be considered when selecting an Ethernet network? (Multiple choice)

Network speed

Network media

Network size

Network hierarchy

Packaging standards

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91. In a complex network environment, the use of non-institutionalized network troubleshooting procedures may lead to new failures, which will make the troubleshooting of network failures more difficult.

True

False

92. When there are a large number of IP telephones and WLAN APs in the network, which function switch will we generally consider?

Switches with STP edge port function

Switch with POE function

Switches with SACG function

Switch with QOS function

93. What is the core idea of network troubleshooting?

Confirm business traffic path

Judgment analysis

Collect information

Top-Down approach

94. The exclusion TELNET logon failure, which is a priority step to do?

Check whether the client can ping the server

Check whether the number of users logging in to the device has reached the upper limit

Check whether ACL is configured in the VTY user interface view on the device

Check whether the protocol configuration allowed for access in the VTY type user interface view is correct

95. Device as SSH server, you must configure the local key pair

True

False

96. The current corporate networks often use OSPF as the routing protocol, then use OSPF doing routing protocol, which of the following issues should be paid attention to? (Multiple choice)

Confirm that the backbone area will not split

Confirm whether there will be sub-optimal routes in the network under the OSPF routing rules

Confirm that all non-backbone areas and backbone areas have correct and reliable links

Confirm the topology of the OSPF network to ensure that OSPF does not have loops during route calculation

Confirm that OSPF 's COST can correctly reflect the real bandwidth of links above 100M

97. Which of the following is not a major role in the development of the project delivery process?

Increase customer satisfaction

Clear division of responsibilities

Improve work efficiency

Reduce project risks

98. The formula is the availability of

MTBF/MTTR/100%

MTTR/RTBF*100%

(MTBF+MTTR)/MTBF*100%

MTBF/(MTBF+MTTR)*100%

99. The current network design patterns can generally be summarized into which of the following items? (Multiple choice)

Modularity

Automation

Hierarchical

Modernization

Standardization

100. When troubleshooting a network failure is performed, you try to ping the remote destination host, discovery packets are lost, so which troubleshooting method is best to take next?

Comparative configuration method

Bottom-up approach

Confirm business flow method

Self-term down method