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NEW QUESTION # 80
On the OSPF network shown in the figure, all IP addresses can communicate with each other. Then the following configurations are added on R1:
Which IP address of S1 can successfully ping 10.2.23.3?
Answer: C
Explanation:
According to the topology and the original question scenario, the correct answer is 10.2.1.1, so option B is selected. In HCIA-Datacom troubleshooting questions of this type, the goal is usually to identify the correct management address, next-hop interface address, or testing destination based on the addressing design shown in the figure.
The answer depends on the role of the device and the direction of the connectivity verification. In such topologies, each interface belongs to a specific network segment, and the selected address must match the intended test target on that segment. If the test is being performed toward the neighboring device or a specific reachable interface, using the correct IP on the proper subnet is essential. An incorrect address may still look familiar from the topology but would not represent the right test endpoint. HCIA-Datacom places strong emphasis on reading topology labels carefully, matching interface addresses to subnet assignments, and choosing the correct destination when using tools such as ping, tracert, or service-specific connectivity tests.
This question mainly checks address recognition accuracy in a troubleshooting context.
NEW QUESTION # 81
On the switched network shown in the figure, STP is enabled on all devices. SW1 is the root bridge. The port costs are shown in the figure. Other parameters retain the default values. After the network is stable, which of the following RPC values is calculated by SW3 for the path to SW1?
Answer: D
Explanation:
SW1 is the root bridge, so its cost is 0. SW3 calculates its Root Path Cost by selecting the lowest- cost path toward SW1.
There are two possible paths from SW3 to SW1:
Direct path SW3 โ SW1: SW3 uses its port cost of 100 on the link to SW1, so RPC = 100.
Indirect path SW3 โ SW2 โ SW1: SW3 to SW2 has a cost of 40, and SW2 to SW1 has a cost of
50, so total cost = 40 + 50 = 90.
The lowest value is 90, so SW3's RPC is 90.
NEW QUESTION # 82
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,C
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.
NEW QUESTION # 83
After entering an incomplete command keyword on the CLI of a Huawei switch, you can press Tab to complete the keyword. If the entered keyword does not change after you press Tab, the possible reason is that the matched keyword is not unique, and YunShan OS cannot determine which specific command it corresponds to.
Answer: B
Explanation:
Huawei YunShan OS provides command-line completion to simplify device configuration and reduce typing errors. Pressing the Tab key can automatically complete a partially entered command keyword.
When the entered characters uniquely identify a valid keyword, the CLI can expand the incomplete input into the corresponding complete keyword.
However, when multiple command keywords share the same prefix, the system cannot immediately determine which keyword the administrator intends to use.
In this situation, the input may remain incomplete, and the administrator can press Tab repeatedly to cycle through possible matching keywords or enter additional characters to distinguish the intended command.
For example, typing a short prefix shared by several commands does not uniquely identify a single command.
Therefore, the statement describes a valid possible reason why command completion does not occur immediately. The correct answer is TRUE.
NEW QUESTION # 84
The administrator runs the interface Eth-Trunk 1 command to create Eth-Trunk 1 on SW1 and SW2. After the network is stable, the administrator runs the display interface brief command on SW1, and finds that Eth- Trunk 1 is Down, the states of its member interfaces are normal, and the configuration on SW1 is correct. The possible cause is that the member interfaces on SW2 are not added to Eth-Trunk 1.
Answer: B
Explanation:
The uploaded key marks this statement TRUE, but the Huawei VRP operating behavior makes FALSE the technically correct answer as the question is written. Creating Eth-Trunk 1 with the interface Eth-Trunk 1 command does not, by itself, enable LACP. The default Eth-Trunk working mode is manual load balancing on the relevant VRP platforms. In manual mode, the local switch does not depend on LACP negotiation with the remote switch to decide whether locally added, physically Up member interfaces can make the aggregation operational. If SW1 ' s member interfaces are physically normal and correctly added to Eth-Trunk
1, failing to add the corresponding SW2 interfaces to its Eth-Trunk can certainly break end-to-end forwarding, but it is not in itself a sufficient explanation for the local Eth-Trunk on SW1 being Down. In LACP mode, missing peer membership can prevent correct aggregation because LACPDUs are not exchanged as expected.
Since LACP mode is not specified here, option B is the verified answer.
NEW QUESTION # 85
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