VLANs on switches

Question 1

Command to set VTP mode to transparent

Answer 1

in global config mode:

vtp mode transparent

Question 2

What are the 4 trunking administrative modes?

Answer 2

1. Access
2. Trunk
3. dynamic desirable
4. dynamic auto

Question 3

Command to show the options set on trunk ports

Answer 3

show interfaces trunk

Question 4

Command to set interface g2/1 to access, associated with vlan 22

Answer 4

conf t
int gi2/1
switchport access vlan 22

Question 5

Command to set the native vlan for a trunk port on a switch

Answer 5

in interface config mode:

switchport trunk native vlan vlanid

Question 6

Command to set a port to initiate trunking negotiation messages.

Answer 6

int gi0/1

switchport mode dynamic desirable

Question 7

What is the normal range and extended range vlan numbers?

Answer 7

Normal = 1 - 1005
Extended = 1006 - 4094

Question 8

What is the limitation on vlans for a switch in VTP server mode?

Answer 8

Server switches can only configure vlans in the standard range

Question 9

Command to set a port to trunk mode

Answer 9

switchport mode trunk

Question 10

Command to change the default vlans allowed on a trunk.

Answer 10

switchport trunk allowed vlan {add | remove | all | except }

Question 11

Command to set the trunking encapsulation on a port to dot1q

Answer 11

switchport trunk encapsulation dot1q

Question 12

How big is the VLAN ID field inside the .1Q header?

Answer 12

12 bits

Question 13

Command to name a vlan

Answer 13

conf t
vlan vlanid
name name

Question 14

Where is the .1Q tag inserted in the ethernet header?

Answer 14

Between the source address and type fields.

Question 15

Command to ensure that an access port does not negotiate to become a trunk

Answer 15

conf t
interface gi1/1
switchport mode access

Question 16

What is the default trunking administrative mode?

Answer 16

Dynamic auto

Question 17

What vlans cannot be deleted?

Answer 17

1, 1002-1005

Question 18

Command to create a vlan on a switch

Answer 18

vlan vlanid

Question 19

Does the command “show interfaces trunk” work on routers, switches, or both?

Answer 19

Switches only

Question 20

Does the command “show interfaces switchport” work on routers, switches, or both?

Answer 20

Switches only

Question 21

How does a router implement vlans?

Answer 21

Through subinterfaces on an ethernet interface

Question 22

Command to set a trunk port to negotiate encapsulation

Answer 22

switchport trunk encapsulation negotiate

Question 23

Can vlan 1 have it’s name changed?

Answer 23

No

Question 24

4 options for VTP mode

Answer 24

1. Client
2. Server
3. Transparent
4. Off

Question 25

Command to set the vtp domain name

Answer 25

conf t

vtp domain name

Question 26

Command to show the vtp domain name

Answer 26

show vtp status

Question 27

Command to create a L3 vlan

Answer 27

conf t
interface vlan vlanid
ip address ip addr subnet mask