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350-401 · Question #1248

350-401 Question #1248: Real Exam Question with Answer & Explanation

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Submitted by renata2k· Mar 6, 2026CCNP ENCOR / CCNA - LAN Switching Technologies: Configure and troubleshoot inter-switch connectivity including 802.1Q trunking, VLAN allowed lists, UDLD, and EtherChannel (LACP) to ensure end-to-end Layer 2 reachability.

Question

Lab Simulation 30 Guidelines This is a lab item in which tasks will be performed on virtual devices. - Refer to the Tasks tab to view the tasks for this lab item. - Refer to the Topology tab to access the device console(s) and perform the tasks. - Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window. - All necessary preconfigurations have been applied. - Do not change the enable password or hostname for any device. - Save your configurations to NVRAM before moving to the next item. - Click Next at the bottom of the screen to submit this lab and move to the next question. - When Next is clicked, the lab closes and cannot be reopened. Topology Tasks Answer: SW10 Conf t Default int e0/0 Int e0/0 No sh Switchport trunk encap dot1q Switchport mode trunk Udld port aggressive Switchport trunk allowed vlan add 300 No sh Ex

Options

  • taskTroubleshoot the trunk between SW10 and SW30 to ensure PC2 can ping PC1 (10.10.100.10), configure SW10 interface E0/0 for aggressive unidirectional link detection, and troubleshoot the LACP port-channel between SW10 and SW20 to ensure PC2 can ping PC3 (10.10.100.30).
  • prerequisitesConsole access to network devices (SW10, SW20, SW30, PC1, PC2, PC3) as shown in the topology.

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Topics

#Trunking & VLANs#UDLD (Unidirectional Link Detection)#LACP Port-Channel#Layer 2 Troubleshooting
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