Free CCNA Training Course | Part 1 – VLANs
So you’re looking at becoming CCNA (200-301) certified? Or perhaps you’re just looking to improve your networking skills?
This video series is for people that have basic networking skills, but want to take them to the next level. If you’re completely new to networking, you may want to try our ‘Introduction to Networking’ series first
Part 1 of this series starts with Layer-2/Switching technology. This covers topics like general switching, VLANs, Interfaces, Spanning-Tree, RSTP, Etherchannels, and Power Over Ethernet (PoE).
The website has additional links for further study to take you to the next level. Links are at the end of the description.
In this video, we’re going to start with:
10:47 Access Ports vs Trunking Ports
18:03 Dynamic Trunking Protocol
Switches typically operate at layer-2. When we think of layer-2, we think of things like Ethernet, MAC addresses, MAC address tables, and VLANs.
VLANs are used to separate traffic. It’s like having a few virtual switches inside one physical switch. They also decrease the broadcast domain, and limit the scope of flooding.
Each interface, or switchport, is assigned to one or more VLANs.
Switch ports that devices like workstations and printers are connected to have one VLAN, and are called an access port. Sometimes we can add a second VLAN for voice traffic, if we also connect a phone there.
When we connect one switch to another, the switch ports are configured as trunks. A trunk port is a port that can carry more than one VLAN (using the 802.1q standard). To do this, the VLAN is added as a ‘tag’ on each frame. For this reason, trunking is also called tagging, and a trunk port is also called a tagged port. Any traffic that doesn’t not already have a VLAN will be part of the ‘native VLAN’.
DTP (Dynamic Trunking Protocol), allows switches to talk to each other, and automatically configure ports as trunk ports or access ports. To help them decide what to do, we configure ports as either ‘desirable’ or ‘auto’.
VTP (VLAN Trunk Protocol) allows us to configure VLANs on one switch, and to have this configure other switches automatically. Switches can be in server, client, or transparent mode.
Study Notes (free): https://networkdirection.net/study-notes/cisco-ccna-study-notes/ccna-vlans
Transcripts (free): https://networkdirection.net/study-notes/cisco-ccna-transcripts/ccna-vlans
Quizzes (for members): https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-vlans
Labs (for members): https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-vlans
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