A network administrator needs to configure a switch port to allow traffic from several VLANs to cross between switches. Which interface configuration should be applied to achieve this?
Configure the interface with switchport mode trunk
Configure the interface with switchport mode access
Set the interface with switchport access vlan 1
Set the interface with switchport mode dynamic auto
To allow a switch port to carry traffic for multiple VLANs, the port must be configured in trunk mode using the command switchport mode trunk. This setting enables the port to tag traffic with the appropriate VLAN identifiers, allowing multiple VLANs to be transported over a single physical link. Configuring the port as an access port (switchport mode access) limits the port to a single VLAN. The command switchport access vlan 1 assigns the port to VLAN 1 as an access port, not allowing multiple VLANs. Setting switchport mode dynamic auto puts the port in a state where it can become a trunk if the other side requests it, but if both sides are set to auto, the link will not become a trunk.
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Cisco CCNA 200-301
Network Access
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