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Flashcards in Implementing VLANs Deck (15)
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1

What is VLAN tagging?

When the sending switch adds another header to the frame before sending it over the trunk. This extra trunking header includes a VLAN identifier (VLAN ID) field so that the sending switch can associate the frame with a particular VLAN ID,

2

What are the two trunking protocols supported by Cisco switches?

ISL and 802.1q

3

How does 802.1q tag a frame?

It inserts an extra 4-byte 802.1Q VLAN header into the original frame’s Ethernet header

4

What fields does an 802.1q tag consist of?

Type, Priority, Flag, and 12-bit VLAN ID. It supports maximum 4094 VLANS

5

Are packets in the native VLAN tagged?

No

6

What command configures a switchport to always act as a trunk?

switchport mode trunk

7

What command configures a switchport to initiate trunking negotiation?

switchport mode dynamic desireable

8

What command configures a switchport to passively wait for trunk negotiation at which point it will negotiate the trunk?

switchport mode dynamic auto

9

Switch A is switchport mode trunk and Switch B is switchport mode dynamic auto

Trunk

10

Switch A is switchport mode dynamic auto and Switch B is switchport mode dynamic auto

No Trunk

11

Switch A is switchport mode dynamic desireable and Switch B is switchport mode dynamic auto

Trunk

12

Switch A is switchport mode trunk and Switch B is switchport mode dynamic desireable

Trunk

13

If a switch has VTP disabled what mode is it in?

Transparent

14

If a switch has VTP disabled and a user goes into configuration mode, enters 'vlan 22' and 'name Hannah' will the VLAN configuration show up in the running-config?

Yes

15

Which show commands identify trunking interfaces?

show interfaces trunk
show interfaces switchport