Volume 1 - Chapter 8: Implementing Ethernet Virtual LANs

Question 1

What is the size of the additional header added to a frame that passes over a trunk?

Answer 1

4 bytes

Question 2

What are the 2 trunking protocols used to connect switches?

Answer 2

ISL (Inter-Switch Link) & 802.1Q

Question 3

What VLAN IDs fall within the normal range?

Answer 3

1 to 1005

Question 4

What VLAN IDs fall within the extended range?

Answer 4

1006 to 4094

Question 5

Which 5 VLANs by default exist on a switch and cannot be deleted?

Answer 5

VLAN 1, 1002, 1003, 1004, 1005

Question 6

What does the acronym VTP stand for?

Answer 6

VLAN Trunking Protocol

Question 7

What 2 commands are used to effectively disable the use of VTP on a switch?

Answer 7

vtp mode transparent

vtp mode off (on newer switches)

Question 8

Describe the difference between the following commands:

“switchport mode dynamic desirable”

“switchport mode dynamic auto”

Answer 8

When using desirable, the switch actively attempts to negotiate a trunk and responds to DTP messages

When using auto, the switch will respond to DTP messages, but not actively attempt to negotiate a trunk

Question 9

What command can be used to display information about all active trunks on the switch?

Answer 9

show interface trunk

Question 10

What command can be used to show additional information about the access/trunk and VLAN status of an interface?

Answer 10

show interface interfacename switchport

Question 11

What command can be used to disable the use of DTP negotiations on a port?

Answer 11

switchport nonegotiate

Question 12

What command can be used to apply a voice VLAN tag on a switchport access interface?

Answer 12

switchport voice vlan vlannumber

Question 13

What commands can be used to shutdown a VLAN?

Answer 13

In global config mode:

shutdown vlan vlannumber

In VLAN config mode:

shutdown