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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Security and Services | 15% | - AAA and basic security technologies - DHCP, DNS, FTP, Telnet services - ACL, NAT principles and configuration |
| Topic 2: Ethernet Technology Basics | 20% | - Link aggregation and stacking technologies - Ethernet standards and switch principles - VLAN, STP, RSTP principles and configuration |
| Topic 3: Data Center Network Basics | 5% | - Basic data center networking technologies - Data center architecture overview |
| Topic 4: Typical Campus Networking Solution | 5% | - End-to-end networking scenarios - Campus network design and integration |
| Topic 5: Network O&M and Troubleshooting | 10% | - Fault diagnosis and troubleshooting methods - Network monitoring and management tools |
| Topic 6: Data Communication Network Basics | 10% | - VRP system basics and operations - Data forwarding process - Basic network concepts and architecture - OSI and TCP/IP protocol models - ARP, TCP/UDP principles - Campus network basics |
| Topic 7: WLAN Technology Basics | 10% | - WLAN architecture and working principles - 802.11 standards and WLAN components - Basic WLAN configuration |
| Topic 8: IP Technology Basics | 25% | - IPv4 addressing, subnetting - IP routing basics and forwarding - IPv6 basics - Static routing, OSPF fundamentals |
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NEW QUESTION # 131
DAD enables a node to detect whether an IPv6 address is already in use by another node before assigning it to an interface. This ensures that duplicate unicast addresses do not exist on a network. Which of the following packets are used for DAD? (Select all that apply)
Answer: C,D
Explanation:
Duplicate Address Detection (DAD) is an IPv6 mechanism used to verify that a unicast address is not already in use before the address is assigned to an interface. DAD is implemented using Neighbor Solicitation (NS) and Neighbor Advertisement (NA) messages, which are part of the ICMPv6 Neighbor Discovery protocol. Therefore, options A and D are correct.
When a host wants to verify a tentative IPv6 address, it sends an NS message for that address. If another node on the link is already using that address, that node responds with an NA message, indicating the address is duplicated and cannot be assigned. If no NA is received within the required period, the host assumes the address is unique and can use it.
NEW QUESTION # 132
Given the following Python code, the output of print(Test) is the same as that of print(test). Test = ' Hello World ' ; test = ' hello world '
Answer: B
Explanation:
Python identifiers and string values are case-sensitive. The variables Test and test are therefore two different variable names, and the assigned strings also differ in capitalization. Test contains the string ' Hello World ' , whereas test contains ' hello world ' . Calling print(Test) outputs the capitalized form, while print(test) outputs the lowercase form. Python does not automatically normalize case when resolving variable names or when displaying strings. The same principle applies to function names, class names, dictionary keys, and most other identifiers or values used in network automation scripts. In Datacom automation work, case sensitivity matters when processing device output, JSON/YANG data, NETCONF payloads, interface names, and user-defined variables. A script that refers to Test when only test has been defined can even raise a NameError because Python treats the two identifiers as unrelated. In this question both variables are defined, but their printed output is visibly different. Consequently, the statement that the two print operations produce the same output is FALSE, option B.
NEW QUESTION # 133
Which of the following information is displayed when an entered command is incomplete on the Versatile Routing Platform (VRP)?
Answer: D
Explanation:
When a command entered on Huawei's Versatile Routing Platform (VRP) is incomplete, VRP generates an error message indicating that the command is incomplete at a specific position (designated by 'A'). This message helps administrators identify where additional parameters are needed to complete the command syntax. Other error messages indicate issues such as excess parameters or ambiguous commands.
NEW QUESTION # 134
The following command output is displayed on R1:
[R1] display aaa configuration
Domain Name Delimiter : @
Domainname parse direction : Left to right
Domainname location : After-delimiter
Administrator user default domain : default_admin
Normal user default domain : default
Domain : total: 256 used: 3
Authentication-scheme : total: 32 used: 2
Accounting-scheme : total: 32 used: 1
Authorization-scheme : total: 32 used: 2
Service-scheme : total: 256 used: 0
Recording-scheme : total: 32 used: 0
Local-user : total: 512 used: 2
Remote-admin-user block retry-interval : 5 Min(s)
Remote-admin-user block retry-time : 3
Remote-admin-user block time : 5 Min(s)
Session timeout invalid enable : No
Which of the following statements is false?
Answer: D
Explanation:
Comprehensive and Detailed 150 to 200 words of Explanation From Datacom knowledge:
The false statement is B . From the AAA configuration output, the value of Remote-admin-user block time is clearly shown as 5 Min(s) , which means the account lockout duration is 5 minutes , not 30 minutes.
Option A is true because Remote-admin-user block retry-time : 3 indicates that after 3 consecutive authentication failures , the account will be blocked. Option C is also true because the displayed Domain Name Delimiter is @ , which is the separator used in usernames such as user@huawei.com. Option D is true as well because the output shows Local-user : total: 512 used: 2 , meaning that the device supports a maximum of 512 local users , and currently 2 local users have been created.
This question checks the ability to correctly read AAA configuration output on Huawei devices. In HCIA- Datacom knowledge, it is important to distinguish between retry interval , retry count , and block time , because these values represent different security control parameters and are often confused during troubleshooting or configuration review.
NEW QUESTION # 135
On the network shown in the figure, if sent by Host A, data frames with which of the following destination MAC addresses can be received by Host B and Host C at the same time?
Answer: A,B
Explanation:
The destination address FF-FF-FF-FF-FF-FF is the Ethernet broadcast address. A switch floods a broadcast frame through the other eligible ports in the same VLAN, so both Host B and Host C can receive the frame.
Option C, 53-80-C2-00-00-01, is a multicast MAC address because the individual/group bit, which is the least significant bit of the first octet, is 1. The first octet 0x53 has a binary least significant bit of 1, identifying a group address. Multicast frames may therefore be delivered to multiple receivers in the same Layer 2 domain, depending on multicast handling and membership behavior. By contrast, the first octets in options B and D,
0x98 and 0x34, have a least significant bit of 0 and are unicast addresses. A unicast frame is intended for a single MAC destination and is not normally delivered simultaneously to both hosts. Therefore A and C are the correct choices. This classification is fundamental when predicting whether a switched Ethernet frame is delivered to one station or replicated to multiple receivers simultaneously.
NEW QUESTION # 136
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