Vlans

Question 1

802.1Q tag size

Answer 1

4 bytes

Question 2

TPID

Answer 2

Tag protocol identifier
16 bits
Dot1q tag field
Identifies protocol being used, fixed value of 0x8100 in dot1q

Question 3

Dot1q tag: TPID fixed value

Answer 3

0x8100

Question 4

PCP

Answer 4

Priority code point
Dot1q tag field
3 bits
Used for class of service

Question 5

DEI

Answer 5

Drop eligible indicator
Dot1q tag field
1 bit
Indicates that frame can be dropped if network is congested

Question 6

Reserved vlans

Answer 6

0, 4095

Question 7

Usable Vlan range

Answer 7

1 to 4094

Question 8

Normal Vlan range

Answer 8

1 to 1005

Question 9

Extended Vlan range

Answer 9

1006 to 4094