Your CCNA studies will involve a large amount of specifics of switches, and for good explanation. in the event you don’t fully grasp standard switching concept, you are able to’t configure and troubleshoot Cisco switches, both about the CCNA Examination or in the true entire world. That goes double for trunking!
Trunking is just enabling two or more switches to communicate and deliver frames to one another for transmission to remote hosts. There's two main trunking protocols that we must know the details of for exam success and true-world achievements, but right before we get to your protocols, Enable’s talk about the cables we need.
Connecting two Cisco switches demands a crossover cable. As you recognize, you will find eight wires inside an ethernet cable. Inside a crossover cable, 4 of your cables “cross above” from one particular pin to a different. For lots of more recent Cisco switches, all you have to do to make a trunk is join the switches that has a crossover cable. For example, 2950 switches dynamically trunk after you join them with the ideal cable. If you use the wrong cable, you’ll be there some time!
There are 2 different trunking protocols in use on today’s 먹튀검증 Cisco switches, ISL and IEEE 802.1Q, typically called “dot1q”. You will find a few major variations among The 2. To start with, ISL is usually a Cisco-proprietary trunking protocol, where dot1q will be the market standard. (Those of you new to Cisco tests must get accustomed to the phrases “Cisco-proprietary” and “market normal”.) Should you’re Doing work in a multivendor environment, ISL will not be a sensible choice. And Despite the fact that ISL is Cisco’s personal trunking protocol, some Cisco switches run only dot1q.
ISL also encapsulates the complete frame, raising the community overhead. Dot1q only places a header within the frame, and in some instances, doesn’t even do that. There may be much less overhead with dot1q in comparison with ISL. That brings about the 3rd big change, just how the protocols get the job done While using the native vlan.
The indigenous vlan is just the default vlan that switch ports are positioned into if they're not expressly put into One more vlan. On Cisco switches, the native vlan is vlan 1. (This may be adjusted.) If dot1q is running, frames that https://www.washingtonpost.com/newssearch/?query=먹튀검증 are likely to be sent over the trunk line don’t even have a header placed on them; the remote change will believe that any body which has no header is destined to the indigenous vlan.
The issue with ISL is that is doesn’t have an understanding of what a native vlan is. Each body might be encapsulated, whatever the vlan it’s destined for.
Switching concept is a big section within your CCNA scientific tests, and it may look mind-boggling at the outset. Just crack your scientific tests down into smaller, extra manageable pieces, and soon you’ll see the magic letters “CCNA” driving your identify!