VLAN and Trunk Lines Flashcards
(9 cards)
What is LAN?
Local Area Network
a group of devices in the same network that can communicate with each other.
What is a VLAN?
2 related things
Virtual Local Area Network
Allows a single switch to behave as multiple separate switches
It logically isolates LAN’s within the same switch
Which ports on a switch are for VLANs?
They can be any port on the switch.
You can assign them any way you like. They don’t have to be next to eachother
What does Non-Blocking Architecture mean?
2 things
Your only restriction is the individual port speed.
The switch is not the bandwidth bottleneck
How does STP prevent broadcast storms?
It breaks the network loop
What is a broadcast storm?
a network phenomenon where a large number of broadcast packets flood the network, overwhelming it and causing significant performance degradation or even network collapse
How do broadcast storms happen?
network loops or misconfigured devices, causing devices to continuously rebroadcast the same packets, creating a cycle of congestion
e.g DHCP requests to all ports of a switch
If the switch is running STP (802.1D) or PVST, is it VLAN aware?
NO. The switch needs to be running (802.1s)
(802.1s) = MSTP
What is a LAG?
What does it do?
Link Aggregation Group
Instructs your switch to use two links as one logical path
