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NEW QUESTION # 12
On the network shown in the figure, the interfaces connecting switches to terminals are access interfaces, and the interfaces connecting switches to each other are trunk interfaces. The administrator configures interface- based VLAN assignment. PC1 and PC3 belong to VLAN 2, and PC2 and PC4 belong to VLAN 3. Trunk interfaces allow packets from VLAN 2 and VLAN 3 to pass through and use the default PVID. The MAC address tables of switches are empty. When SW1 receives a unicast data frame sent from PC1 to PC3, through which of the following interfaces does SW1 not send the data frame?
Answer: A,B
Explanation:
PC1 and PC3 are members of VLAN 2, while PC2 and PC4 are members of VLAN 3. SW1 receives the frame from PC1 on access interface GE1/0/1 and associates it with VLAN 2. Because all switch MAC address tables are initially empty, PC3 ' s destination MAC address is unknown to SW1. The switch therefore floods this unknown unicast frame only through other interfaces that can carry VLAN 2. GE1/0/3 connects to PC3 in VLAN 2, so it is a valid flood port. GE1/0/4 is a trunk that permits VLAN 2 and VLAN 3, so it is also eligible to carry the VLAN 2 frame. SW1 does not send the frame back through GE1/0/1, the ingress interface, and it does not send it through GE1/0/2 because that access port belongs to VLAN 3. Therefore, the interfaces through which SW1 does not send the frame are GE1/0/2 and GE1/0/1, corresponding to A and D.
NEW QUESTION # 13
If the neighbor relationship between R1 and R2 has reached the Full state in OSPF, which of the following statements are true? (Select all that apply)
Answer: A,C,D
Explanation:
When two OSPF routers reach the Full state, it means that adjacency establishment has been successfully completed and the routers have synchronized the necessary link-state information for that area. For this to happen, the two routers must have different router IDs, so option A is correct. They must also belong to the same OSPF area on the interfaces used to form the adjacency, making option B correct. Once adjacency reaches Full state, the routers have synchronized their link-state databases for that area, so option D is also correct.
NEW QUESTION # 14
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 # 15
PC1 at 192.168.1.1/24 and PC2 at 192.168.1.102/25 are directly connected using an Ethernet cable, and the physical status of their network ports are normal. They can directly communicate with each other although their masks are different.
Answer: B
Explanation:
Although the two PCs are physically connected and the link status is normal, IP communication requires both devices to be in the same logical subnet to communicate directly without a router.
PC1 uses 192.168.1.1/24, while PC2 uses 192.168.1.102/25, which places them in different subnet boundaries. Because their subnet masks differ, they are not in the same Layer 3 network, so direct communication is not guaranteed and generally not possible without routing or special configuration.
NEW QUESTION # 16
A Huawei network device functioning as an AAA server is referred to as a local AAA server.
Compared with a remote AAA server, a local AAA server reduces operation costs. However, the amount of information that can be stored on a local AAA server is limited by the hardware performance of the device.
Answer: B
Explanation:
A local AAA server runs directly on the Huawei network device, which reduces deployment and operational costs compared to a remote AAA server. However, its storage capacity and processing capability are constrained by the device hardware resources, limiting the amount of AAA information it can maintain.
NEW QUESTION # 17
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