Network Switching Overview - N10-008 CompTIA Network+ : 2.3

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If you’re going to troubleshoot a network, then you need to understand the basic functionality of an Ethernet switch. In this video, you’ll learn the fundamentals of Ethernet switching, the address resolution protocol, power over Ethernet, and more.
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FOLLOW PROFESSOR MESSER:

[daelightmoon]

When you described flooding for an unknown MAC address, I thought "hey! that's like when a hub is directing traffic on a half duplex network!" and then you confirmed it immediately after. You taught me both things! Thank you so much. :)

[handlesaretoopersonal]

So a switch is like a piano and when you don't know where traffics going it's like the switch smacks all the keys and hopes it works, and if the switch does know the next note it just presses the right key

[buncle]

I just want to jump in to say I really enjoyed the use of the SG1 team - one of my favourite tv shows!

[kishawnlewis]

is it possible to do a reverse ARP, in order to receive an IP address based on a MAC address?

[khaledbuffet]

SLAAC uses EUI -64 to create its own address right ?

[xFlow]

for the ethernet frame destination mac address, who's mac address is it exactly if the traffic is going to a different subnet? Is it the Mac address of the default gateway router (the first hop) or is the mac address of the actual device that this traffic is being sent to? If it is the actual recipient's mac then how would a switch know anything about mac address that's on a different subnet or out on the internet even?

[Chunda]

Hey Professor, thanks for putting this up. I am in the middle of a very challenging selection process for an elite bootcamp and am preparing for it with your videos. I also feel well prepared for the Net+ exam, you are a great resource. One interesting question I have about PoE. If the cable itself is originally designed to carry data, isn't sending power over it a much higher load? How much is the difference and wouldn't this need a slightly heavier gauge of wire? Also, wouldn't the current flow cause interference or problems with data flow on the other wires in the cable? Not urgent, thanks for any input you have. Since there is a standard for it, I'm probably worried over nothing and it won't catch fire, but you can understand my concern of course.

[johnalderton]

A bit of a random question, but could someone cause a DOS by repeatedly contacting a non-existent MAC, forcing the switch to continuously flood the LAN with that traffic?

[mbreed]

You know, I wasted 5 minutes trying to find out what SGC was.