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| Section | Objectives |
|---|---|
| Routing Technologies | - Dynamic routing fundamentals (OSPF basics) - Static routing |
| Network Management and Troubleshooting | - Basic troubleshooting tools and methods - Device management concepts |
| IP Addressing and Subnetting | - IPv6 fundamentals - IPv4 addressing and subnet masks |
| Network Security Basics | - Basic network security concepts - Access control lists (ACL) |
| IP Services | - DHCP and DNS concepts - NAT basics |
| Network Fundamentals | - OSI and TCP/IP models - Basic network topologies and devices |
| Switching Technologies | - STP/RSTP concepts - VLAN configuration and trunking |
| WLAN Basics | - Wireless networking fundamentals |
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NEW QUESTION # 102
The undo command can be used in the CLI of a Huawei device to restore default settings, disable functions, or delete configurations. Which of the following are correct undo commands? (Select all that apply)
Answer: A,B,D
Explanation:
On Huawei devices, the undo command is used to remove a previously applied configuration, disable a function, or restore a parameter to its default state. In option B , undo ip address is a valid interface-view command that removes the IP address configured on the interface. In option C , undo portswitch is also a valid interface command on switch interfaces that converts a Layer 2 interface into a Layer 3 interface when supported by the device. In option D , undo sysname restores the device name to the default hostname, which is valid in system view.
Option A is incorrect because system-view is a command used to enter system view from user view, but undo system-view is not a valid command for exiting that view. Exiting system view is done with commands such as quit, return, or by using shortcut keys. This question checks the understanding that undo only applies to configurable features and parameters, not to view-switching commands in the CLI hierarchy.
NEW QUESTION # 103
FILL BLANK
If a gateway router wants its connected IPv6 terminals to obtain IPv6 addresses through SLAAC, it must set the M-bit in RA messages to _______. (Enter only digits.)
Answer:
Explanation:
0
Explanation:
For SLAAC (Stateless Address Autoconfiguration), the router advertisement message must indicate that no DHCPv6 stateful configuration is required. This is done by setting the M-bit (Managed flag) to 0, which tells hosts to configure their IPv6 addresses using SLAAC only.
NEW QUESTION # 104
Before calling a class from a third-party library in Python code, you must import relevant modules using import or from... import statements.
Answer: B
Explanation:
In Python, importing modules is not strictly required before calling a class only in all cases. While standard practice is to use import or from...import to access classes from third-party libraries, Python can still reference classes indirectly (for example through dynamic imports, exec, or prior namespace exposure). Therefore, the statement that it is mandatory in all cases is incorrect.
NEW QUESTION # 105
The essence of communication is the transmission and exchange of information between two or more points.
The three elements of communication are the sender, content, and transmission channel of the information.
The receiver of the information is not included among these elements.
Answer: B
Explanation:
This statement is false because the receiver is one of the fundamental elements of communication. In basic communication theory, a complete communication process requires at least four essential elements: the sender
, the information or message content , the transmission medium or channel , and the receiver . If the receiver is missing, communication cannot be completed because there is no endpoint to accept, interpret, or respond to the transmitted information.
In datacom networks, this concept maps directly to real networking scenarios. A source host generates data, the data is carried over some medium such as copper, fiber, or wireless, and a destination host receives the data. Network devices such as switches and routers assist the forwarding process, but the fundamental communication model still includes both communicating endpoints. HCIA-Datacom emphasizes the complete sender-to-receiver process when introducing network communication basics, protocol encapsulation, and forwarding. Therefore, excluding the receiver from the communication elements is conceptually incorrect.
The correct understanding is that sender, receiver, information content, and channel together form the essential basis of communication.
NEW QUESTION # 106
During VLAN planning for a campus network, VLAN IDs for different service types must be allocated consecutively, without redundancy, to prevent omissions in future allocations.
Answer: B
Explanation:
This statement is false . In campus network VLAN planning, VLAN IDs do not have to be allocated strictly consecutively without any gaps. In fact, leaving some reserved VLAN IDs is often a practical and recommended design approach. VLAN planning should focus on clarity, scalability, maintainability, and service separation , rather than on forcing all VLAN IDs to be contiguous.
For example, an administrator may reserve certain VLAN ranges for user access, voice services, management, wireless services, guest access, future expansion, or specific departments. Such structured planning makes later network expansion easier and reduces the risk of service conflicts or disruptive renumbering. HCIA- Datacom emphasizes that good campus network planning should consider current requirements and future growth. Consecutive allocation may look tidy at first, but it can actually reduce flexibility and make later additions more difficult. Therefore, the idea that VLAN IDs must be assigned consecutively without redundancy to avoid omissions is not a correct design principle. Reasonable reservation and categorized allocation are often more beneficial in real enterprise campus networks.
NEW QUESTION # 107
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