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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIA-Datacom V2.0 |
| Exam Number: | H12-811_V2.0-ENU |
| Exam Duration: | 90 minutes |
| Available Languages: | English, Chinese |
| Passing Score: | 600/1000 |
| Real Exam Qty: | 60 |
| Certificate Validity Period: | 3 years |
| Exam Price: | $200 USD |
| Related Certifications: | HCIA-Datacom |
| Exam Format: | Multiple-response, Multiple-choice, Simulation, Drag-and-drop |
| Sample Questions: | Huawei H12-811_V2.0 Sample Questions |
| Exam Way: | Available at Pearson VUE test centers (offline) or online proctored exam. |
| Pre Condition: | No prerequisites required; candidates can register directly. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/cert/#/cert/Details/68381b0d8e534a6a9339761047279030 |
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NEW QUESTION # 57
What is the main function of the DNS protocol?
Answer: A
Explanation:
DNS (Domain Name System) is responsible for translating human-readable domain names (like www.example.com) into IP addresses, enabling devices to locate services on a network.
NEW QUESTION # 58
When configuring wireless services on a Huawei WAC, you need to configure a service VLAN to ensure the proper transmission of data packets from STAs. In which of the following profiles is the service VLAN configured?
Answer: C
Explanation:
On a Huawei WAC, the VAP profile is the profile that brings together the service attributes required to instantiate a wireless service on an AP radio. The service VLAN is configured in this VAP profile using the service-vlan command. The VAP profile can also reference an SSID profile and a security profile and can define the data forwarding mode, allowing the wireless service to map associated STA traffic into the correct wired VLAN. The SSID profile primarily defines the WLAN name and related SSID behavior. The security profile defines authentication and encryption policies such as WPA/WPA2/WPA3 parameters. The regulatory domain profile controls radio regulatory settings such as country-specific channel and transmit-power constraints. None of those profiles is the location in which the service VLAN itself is defined. Huawei configuration examples explicitly show the administrator entering the VAP profile view and then applying service-vlan vlan-id or a VLAN pool. Therefore, the correct choice is C, VAP profile.
NEW QUESTION # 59
If PC1 obtains an IPv6 address through SLAAC, which of the following is the network prefix length of the address that PC1 receives?
Answer: D
Explanation:
In SLAAC (Stateless Address Autoconfiguration), IPv6 hosts always use a 64-bit interface identifier with a /64 network prefix. The router advertisement provides a /64 prefix, and the host generates the remaining 64 bits for its interface ID.
NEW QUESTION # 60
Network administrators need to manage and maintain devices on the campus network. Which of the following protocols cannot modify device configurations, such as interface IP addresses, device names, and so on?
Answer: B
Explanation:
The protocol that cannot directly modify device configurations such as interface IP addresses or device names is SFTP , so option C is correct. SFTP is a secure file transfer protocol that runs over SSH and is mainly used to upload, download, and manage files between a client and a network device. It is commonly used for tasks such as transferring configuration files, system software, patches, or log files, but it does not itself provide an interactive or structured configuration modification mechanism.
By contrast, STelnet allows secure remote CLI login, through which an administrator can directly enter commands to change device settings. NETCONF is specifically designed for network configuration management and can modify configurations in a structured manner. SNMP can also modify certain managed object values through write operations when permissions and MIB support allow it, although in practice it is used more often for monitoring. HCIA-Datacom distinguishes between management-plane protocols based on their roles: interactive access, structured configuration, monitoring, and file transfer. This question checks whether the learner can identify SFTP as a file transfer tool rather than a direct configuration protocol.
NEW QUESTION # 61
In a wireless communication system, information is first converted into digital signals for easy circuit calculation and processing by the transmitter through source coding, and then converted into radio waves through channel coding and modulation. Which of the following parameters of a carrier are modified during the modulation process based on signal changes? (Select all that apply)
Answer: A,B,D
Explanation:
During modulation, the transmitter maps digital information onto certain physical characteristics of a carrier signal so that the information can be transmitted over the air. The three classic carrier parameters that can be modified are amplitude , frequency , and phase . Therefore, options A , B , and D are correct.
Amplitude modulation changes the strength of the carrier wave. Frequency modulation changes the oscillation rate of the carrier. Phase modulation changes the phase angle of the carrier relative to a reference. Modern wireless communication systems often combine these parameters, especially amplitude and phase, in complex digital modulation schemes such as QPSK, 16-QAM, 64-QAM, or higher-order QAM used in WLAN standards. Option C , channel, is not a carrier parameter modified during modulation. A channel refers to a frequency resource or spectrum allocation used for communication, not a physical waveform characteristic being directly altered to encode bits. HCIA-Datacom introduces these basic wireless concepts to help learners understand how WLAN signals are transmitted, how data rate improvements are achieved, and why different modulation methods have different requirements for signal quality and interference resistance.
NEW QUESTION # 62
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