802.1p

802.1p is a standard for priority levels, identifying the class of service a VLAN is to be used for. There are 8 different levels, numbered from 0 to 7.

Priority	Acronym	Traffic types	Comment
0	BK	Background	Lowest
1	BE	Best Effort
2	EE	Excellent Effort
3	CA	Critical Applications
4	VI	Video	< 100 ms latency and jitter
5	VO	Voice	< 10 ms latency and jitter
6	IC	Internetwork Control
7	NC	Network Control	Highest