the VLAN IDRefer to curriculum topic: 6.3.3The administrator can use the encapsulation command to specify the encapsulation type (IEEE 802.1Q or ISL), the VLAN ID, and optionally the native VLAN. Explanation: The 10 in the encapsulation dot1Q 10 native command specifies the VLAN ID of the traffic on that particular subinterface. In this case, traffic on VLAN 10 will be untagged, or native, meaning it will not be tagged with a VLAN ID. All other traffic on other VLANs will be tagged.