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NEW QUESTION # 147
On the OSPF network shown in the figure, all IP addresses can communicate with each other. Then the following configurations are added on R1:
[R1] acl 3000
[R1-acl4-advance-3000] rule deny ip source 10.0.1.1 0.0.0.0
[R1-acl4-advance-3000] rule deny ip source 10.1.1.1 0.0.0.0
[R1-acl4-advance-3000] rule permit ip source 10.3.1.1 0.0.0.0
[R1-acl4-advance-3000] rule permit ip
[R1-acl4-advance-3000] quit
[R1] traffic classifier test
[R1-classifier-test] if-match acl 3000
[R1-classifier-test] quit
[R1] traffic behavior test
[R1-behavior-test] permit
[R1-behavior-test] quit
[R1] traffic policy test
[R1-trafficpolicy-test] classifier test behavior test
[R1-trafficpolicy-test] quit
[R1] interface GE 0/0/1
[R1-GE0/0/1] traffic-policy test outbound
[R1-GE0/0/1] quit
Which IP addresses of S1 can successfully ping 10.0.23.3? (Select all that apply)
Answer: A,B,C,D
Explanation:
All four addresses can successfully ping 10.0.23.3, so the correct answer is A, B, C, D .
The key point is that the traffic policy is applied outbound on GE0/0/1 of R1, which is the interface facing S1
. When S1 pings 10.0.23.3, the echo request travels from S1 to R1 and then to S2. The return echo reply from
10.0.23.3 comes back to R1 and is then sent outbound on GE0/0/1 toward S1. Therefore, the traffic policy examines the reply packets , not the original ping request packets.
In those reply packets, the source IP address is 10.0.23.3 , and the destination is one of S1's loopback addresses. The ACL rules denying 10.0.1.1 and 10.1.1.1 as source addresses do not match these reply packets, because those addresses appear as destination addresses , not source addresses. In addition, the ACL contains rule permit ip, which permits all remaining IP traffic. As a result, replies to all four S1 addresses are forwarded successfully, so every listed address can ping 10.0.23.3.
NEW QUESTION # 148
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 # 149
Drag and Drop Question
On the network shown in the figure, the administrator creates an Eth-Trunk between SW1 and SW2 to increase link bandwidth and enable terminals in VLAN 10 and VLAN 20 to communicate with each other. When the network is running, the administrator encounters network problems.
Match the problems with the troubleshooting methods.
Answer:
Explanation:
Explanation:
GE1/0/3 added to the Eth-Trunk is always in Down state. -> Run the display interface brief command to check the status and error statistics of physical interfaces.
The traffic sent from PC1 cannot reach PC3 after passing through the Eth-Trunk. -> Check whether the lists of allowed VLANs on the Eth-Trunk interfaces at both ends are the same.
The Eth-Trunk cannot be established between the two devices. -> Check whether the aggregation modes at both ends of the Eth-Trunk match.
Physical Interface Down: When a single member port (GE1/0/3) fails to come up within the trunk, the immediate first step is checking the physical layer and link-layer protocol status using display interface brief to rule out hardware, cable, or transceiver errors.
VLAN Reachability Issues: If the Eth-Trunk trunk link is successfully built but specific traffic (like PC1 in VLAN 10 to PC3 in VLAN 10) fails to traverse across, it points directly to misconfigured VLAN permissions (e.g., forgetting to allow VLAN 10 on the Eth-Trunk trunk port configuration).
Trunk Establishment Failure: If the logical Eth-Trunk interface itself cannot form, it is typically due to a mismatch in foundational parameters-most notably, one side being configured in standard manual load-balancing mode while the other is using dynamic LACP mode.
NEW QUESTION # 150
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 # 151
There are two Ethernet frame formats: Ethernet_II and IEEE 802.3. The Ethernet_II frame format uses the Type field to determine the upper-layer protocol type, and the IEEE 802.3 frame format uses the Tag field to determine the upper-layer protocol type.
Answer: B
Explanation:
Ethernet II frames use the Type field to indicate the upper-layer protocol, while IEEE 802.3 frames use the Length field (not a Tag field) to distinguish frame length. The protocol type in IEEE
802.3 is determined by the LLC/SNAP layer above the frame, not by a Tag field.
NEW QUESTION # 152
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