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NEW QUESTION # 111
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 # 112
When deploying a WLAN with the WAC + Fit AP architecture on a customer ' s live network, you find that APs fail to go online. Which of the following are possible causes? (Select all that apply)
Answer: A,B,C,D
Explanation:
Huawei ' s HCIA-Datacom WLAN training material describes several conditions necessary for successful Fit AP onboarding.
Option A is correct because APs require IP connectivity to communicate with the WAC and establish CAPWAP tunnels.
Option B is correct because Fat APs operate independently and do not use the centralized Fit AP management architecture unless their operating mode is changed.
Option C is correct because Huawei WACs require a CAPWAP source interface or source IP address for tunnel establishment.
Option D is correct because Fit APs normally require valid IP addresses before communicating with their WAC.
The DHCP configuration must therefore provide suitable IP addressing, gateway information, and any necessary WAC discovery information.
Successful AP onboarding depends on network connectivity, appropriate AP operating mode, WAC discovery, and CAPWAP tunnel establishment.
Therefore, all four options are correct.
NEW QUESTION # 113
Assume that you cannot configure an IP address for GE1/0/1 on a Huawei switch. Which of the following commands can you run in the interface view to resolve this problem?
Answer: B
Explanation:
On Huawei switches, a physical Ethernet interface usually works as a Layer 2 switch port by default. A Layer 2 interface cannot be assigned an IP address directly. If an administrator wants to configure an IP address on such an interface, the interface must first be converted into a Layer 3 interface . The command used for this is undo portswitch , so option B is correct.
After this command is executed, the interface no longer behaves as a Layer 2 switching port and can then support Layer 3 features such as direct IP address configuration. Options A , C , and D are all Layer 2 port- type commands used to configure the interface as a trunk, access, or hybrid port. These commands do not solve the problem because they keep the interface operating at Layer 2. HCIA-Datacom emphasizes the difference between Layer 2 switching interfaces and Layer 3 routed interfaces on switches. Understanding when to use undo portswitch is important in campus network deployment, especially when configuring routed uplinks, management interfaces, or inter-device Layer 3 links on switches.
NEW QUESTION # 114
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 ports are alternate ports? (Choose all that apply.)
Answer: A,D
Explanation:
To find the alternate ports, we first identify the quickest path to the root bridge, SW1, for every other switch. SW2 reaches the root directly through its top port with a cost of 30. SW3 has the fastest direct path with a cost of 10. SW4 calculates that going through SW3 is cheaper than going directly to the root, giving it a total root cost of 40. SW5 finds its best path by going through SW4, resulting in a total root cost of 50. All of these preferred entry points become Root Ports.
Next, we look at the remaining open links to see which ports must be blocked to prevent loops.
On any connection between two switches, the switch that is further away from the root bridge loses the battle and has to block its port, turning it into an Alternate Port.
When comparing the cross-link between SW1 and SW4, SW1 is the root bridge itself, so SW4 loses this matchup and blocks its GE1/0/3 port. Looking at the link between SW3 and SW5, SW3 is much closer to the root bridge with a cost of 10 compared to SW5's cost of 50, which forces SW5 to block its GE1/0/1 port. On the remaining links, SW2 forces SW4 to block its GE1/0/2 port, and SW3 forces SW2 to block its GE1/0/3 port.
Matching these blocked paths to the given choices leaves us with GE1/0/3 of SW4 and GE1/0/1 of SW5 as the alternate ports.
NEW QUESTION # 115
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.
NEW QUESTION # 116
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