Answer :
Final answer:
To set VLAN 99 from trunk to untagged, the correct command is 'switchport access vlan 99'. The command makes VLAN 99 the native vlan for that interface, and untagged frames coming on this interface would be assumed to belong to VLAN 99.
Explanation:
To set VLAN 99 from trunk to untagged, you would use the command 'switchport access vlan 99'. This configuration is done on Cisco switches to specify that the interface should now belong to VLAN 99 and treat all incoming frames as untagged. This makes VLAN 99 the 'native vlan' for that interface. Any untagged frames coming on this interface would be assumed to belong to VLAN 99. This removes the previous trunk configuration.
Please note that you should be aware of the default VLAN configuration on your switch, since using 'switchport access vlan 99' can have different results if the default VLAN is not 1.
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