2.1.c Implement and Troubleshoot VLAN Flash Cards
Here are my flash cards for 2.1.c Implement and Troubleshoot VLAN. I am giving these flash cards in TXT and in an ANKI package.
If you don’t have or know what Anki is, it is my favorite , free flash card program:
Here is the Anki package you may import and start using the flash cards right away:
How big is the 802.1Q header/field?
What 3 fields are in the 802.1q header?
1. 802.1p for class of service/l2 qos
2. DEI/Drop eligible indicator
3. ID: vlan membership
What will a switch do if it receives a frame with a 802.1q header and the switch port is an access port?
The switch will drop the frame.
What 4 port types are available with Cisco switches?
How would you configure g0/1 as an access port for vlan 2? How would you verify it?
Why would we want to statically configure a port as “switchport mode access” ?
This prevents DTP messages from going out of the port, thus prevents DTP attacks.
What 3 things does the macro “switchport host” do?
What file holds the vlan config for a switch?
The vlan.dat file holds the vlan config and some vtp config for a switch.
When decomming a switch and factory resetting it, what must be done to wipe the vlan info?
Manually delete them or delete the vlan.dat file via “delete vlan.dat”
What is true about extended vlans and the vlan.dat file?
Extended vlan information is not stored idn the vlan.dat file
What is the normal vlan range? 1 – 1001
What is the reserved vlan range? What is it for? 1002 – 1005.
What is the extended vlan range? What is true about the vtp mode to use these?
1006 – 4094.
How does the “voice vlan” work?
When an access port is also configured for the voice vlan, CDP wil advertise a voice vlan to the Cisco phone on the other end. This allows the phone to dynamically learn the voice vlan, and also dynamically separate its voice from itself and data traffic from the PC.
What are 4 ways to configure a voice vlan, from best to worst?
When you enable the voice vlan on an access port, what field is added to the CDP message, what 4 fields contain?
The “VoIP VLAN reply” field is added to the CDP message which contains a type value, length, data, and most importantly , voice vlan.
How can we configure int g0/1 with a data vlan of 1, and a voice vlan of 2?
What 4 options does “switchport voice vlan” offer us, describe each?
1. switchport voice vlan (most common and recommended)