You are configuring a network where devices connected to Switch A in a specific VLAN need to communicate with devices in the same VLAN connected to Switch B. You have created the VLAN on Switch A and assigned the necessary ports to it. What must you do to ensure communication across both switches?
Enable PortFast on the links connecting Switch A and Switch B.
Assign the inter-switch ports to the default network on both switches.
Use access ports between Switch A and Switch B configured in the same network segment.
Configure a trunk link between Switch A and Switch B to allow tagged traffic to pass.
To enable devices in the same VLAN on different switches to communicate, you must configure a trunk link between Switch A and Switch B. Trunk ports allow tagged traffic for multiple VLANs to pass between switches using IEEE 802.1Q encapsulation. Without a trunk link, VLAN tags are not preserved across the inter-switch connection, and devices in the same VLAN on different switches cannot communicate. Using access ports between switches would not carry VLAN tags, and enabling PortFast is intended for access ports connected to end devices, not inter-switch links. Assigning the inter-switch ports to the default network would not allow the specific VLAN traffic to pass unless the link is configured as a trunk.
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Cisco CCNA 200-301
Network Access
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