Implementing Ethernet Virtual LANs Flashcards Preview

CISCO CCNA 200-301 > Implementing Ethernet Virtual LANs > Flashcards

Flashcards in Implementing Ethernet Virtual LANs Deck (9)
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Broadcast domain

The set of all LAN-connected devices, so that when any of the devices sends a broadcast frame, all the other devices get a copy of the frame


Virtual LANs (VLANs)

Individual broadcast domains cretaed by the switch, treating the ports in each domain as being completely separate


Most common reasons for VLANs

- To reduce CPU overhead on each device
- To reduce security risks
- To create more flexible designs t
- To solve problems more quickly
- To reduce the workload for the Spanning Tree Protocol


VLAN trunking

The process by which VLANs are forwarded to multiple interconneted switches


VLAN tagging

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, and the receiving switch can then know in what VLAN each frame belongs


VLANs ranges

1-1005 Normal range
1006-4094 Extended range
0/4095 Reserved


Native VLAN

Special VLAN ID (default VLAN 1) which frames with no 802.1Q header are part of
It must be agreed on if the switches support tagging


VLAN Trunking Protocol (VTP)

VTP is a Cisco proprietary tool on Cisco switches that advertises each VLAN configured in one switch (with the vlan number command) so that all the other switches in the campus learn about that VLAN


Dynamic Trunking Protocol (DTP)

Used to negotiate which trunking type to use between IEEE 802.1Q and ISL