Vlans Flashcards
1
Q
802.1Q tag size
A
4 bytes
2
Q
TPID
A
Tag protocol identifier
16 bits
Dot1q tag field
Identifies protocol being used, fixed value of 0x8100 in dot1q
3
Q
Dot1q tag: TPID fixed value
A
0x8100
4
Q
PCP
A
Priority code point
Dot1q tag field
3 bits
Used for class of service
5
Q
DEI
A
Drop eligible indicator
Dot1q tag field
1 bit
Indicates that frame can be dropped if network is congested
6
Q
Reserved vlans
A
0, 4095
7
Q
Usable Vlan range
A
1 to 4094
8
Q
Normal Vlan range
A
1 to 1005
9
Q
Extended Vlan range
A
1006 to 4094