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Data packets between the multiservice access switch and the PC or workstation are on the native VLAN. All packets going out on the native VLAN of an IEEE 802.1Q port are sent untagged by the access switch. The PC or workstation connected to the IP phone usually sends untagged packets, as shown in Figure 3-12, whereas a PC VLAN that connected directly to the phone sends untagged packets because this considers the native VLAN and voice VLAN as VVID 110. The IP phone tags voice packets based on the CDP information from the access switch.