standard for providing QoS using three bits (defined in 802.1q) to allow switches to reorder packets based on priority level. TOS Type of Service A method of setting precedence for a particular type of traffic for QoS. 802.1q An IEEE standard for providing virtual LAN (VLAN) identification and QoS levels. Three bits are used to allow eight priority levels, and 12 bits are used to identify up to 4,096 VLANs. Trunk
