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| Section | Objectives |
|---|---|
| Topic 1: Network Fundamentals | - OSI and TCP/IP models - Basic network topologies and devices |
| Topic 2: IP Services | - DHCP and DNS concepts - NAT basics |
| Topic 3: WLAN Basics | - Wireless networking fundamentals |
| Topic 4: Network Management and Troubleshooting | - Basic troubleshooting tools and methods - Device management concepts |
| Topic 5: Switching Technologies | - STP/RSTP concepts - VLAN configuration and trunking |
| Topic 6: IP Addressing and Subnetting | - IPv6 fundamentals - IPv4 addressing and subnet masks |
| Topic 7: Network Security Basics | - Access control lists (ACL) - Basic network security concepts |
| Topic 8: Routing Technologies | - Dynamic routing fundamentals (OSPF basics) - Static routing |
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NEW QUESTION # 27
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 # 28
Which of the following statements are true about the Python code shown below? (Select all that apply) import paramiko import time ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect('192.168.1.254', username='python', password='Huawei@123') channel = ssh.invoke_shell() channel.send('screen-length 0 temporary\n') time.sleep(1) output = channel.recv(65535).decode('utf-8') print(output) ssh.close()
Answer: A,B,C,D
Explanation:
All four statements are correct. The code uses the Paramiko library to automate SSH login to a network device. import paramiko and import time load the Python modules required for SSH communication and delay control, so option C is correct. The statement ssh = paramiko.SSHClient() creates an SSH client object, and ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) allows the client to accept an unknown host key automatically in this example scenario.
The command ssh.connect('192.168.1.254', username='python', password='Huawei@123') establishes an SSH connection to the target device, so option B is correct. Then channel = ssh.invoke_shell() opens an interactive shell channel, which is commonly used to send CLI commands and receive output just as an administrator would in a terminal session, making option D correct. The command channel.send('screen-length 0 temporary\n') disables page-by-page output for the current session, which is useful in network automation. Finally, ssh.close() closes the SSH session and releases the connection, so option A is correct. HCIA-Datacom automation knowledge often uses Paramiko examples to demonstrate basic Python-based device O&M.
NEW QUESTION # 29
On a small WLAN shown in the figure, SW2 acts as a DHCP server to assign IP addresses to STAs, and the user data forwarding mode is direct forwarding. Which of the following traffic paths is used for a STA accessing the Internet after connecting to the WLAN through AP1?
Answer: A
Explanation:
In direct forwarding mode, user data is forwarded directly from the AP through the wired network to the upstream network without passing through the WAC. After the STA connects to AP1, traffic follows AP1 → SW1 → SW2 → Internet. The WAC is only used for control and management functions, not for data forwarding, so it is not in the user data path.
NEW QUESTION # 30
On the campus network shown in the figure below, the core switch Core1 functions as a Layer 3 gateway and as a DHCP server to dynamically assign IP addresses to AP1, PC1, PC2, and PC3.
The network below Core1 is a Layer 2 network. WAC1 and R1 are connected to Core1 at Layer
3. AP1 goes online through VLAN 100. The wireless service VLAN is VLAN 101, and the wired service VLANs for PC2 and PC3 are VLAN 102 and VLAN 103, respectively. Additionally, the direct forwarding mode is used for wireless traffic forwarding. If no additional VLANs are allowed on device interfaces, which of the following VLANs must be allowed on GE1/0/1 of ACC1? (Select all that apply)
Answer: A,B,C
Explanation:
According to the original topology and service-planning question, the required VLANs are VLAN
100, VLAN 101, and VLAN 102, so options A, B, and C are correct. In HCIA-Datacom campus design questions, VLAN planning is usually based on service separation, such as user services, voice services, wireless services, management services, or specific departmental segmentation.
Each service type is assigned an appropriate VLAN so that broadcast domains are separated and policies can be applied more effectively.
NEW QUESTION # 31
An enterprise has deployed a Huawei WLAN, but some STAs cannot associate with wireless signals. To troubleshoot this issue, you log in to the WAC and run related commands. The command output is as follows. According to the command output, which of the following is the possible cause of the STA association failure?
Answer: B
Explanation:
If you look closely at the column CU (Channel Utilization) for both radios of AP ID 0:
Radio 0 (2.4G band): The CU is at 90%.
Radio 1 (5G band): The CU is at 13%.
A channel utilization of 90% on the 2.4G radio indicates severe congestion and heavy wireless interference. When the air interface is that busy, stations (STAs) attempting to connect will suffer from massive packet loss, timeouts, and a general inability to complete the association handshake.
NEW QUESTION # 32
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