Vlans help us group hosts by whatever category.
Vlans allow you to increase security by hiding logical group of hosts from everyone else you want.
Prevents broadcast storms.
Broadcast storms slow network performance down a little, little more, little more and prevents basic switching functions.
IP address run at layer three.
Lab Example
If your on host one and you
host1# show cdp neighbor
You’ll see your physical connections.
Switch1
Log on to switch1
switch1# show cdp neighbor
See all of your connections.
show vlan will give you info you need.
switch1#
switch1# config t
switch1#(config) #int fast 0/2
switch1(config-if)# switchport access vlan 24
this is creating vlan 24
switch1#(config) #int fast 0/4
switch1(config-if)# switchport access vlan 24
switch1#show vlan brief
You’ll see it was created
