Understanding Switches

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Published 2011-02-17
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Info
Level: Beginner
Date Created: July 12, 2010
Length of Class: 57 Minutes
Tracks

Networking
Prerequisites

Introduction to Networking
Purpose of Class

This class discusses the purpose of network switches and their functions.
Topics Covered

Switches vs. Hubs
Managed vs. Unmanaged Switches
Speeds and Duplex
Quality of Service
Power Over Ethernet
VLAN
Spanning Tree Protocol
Class Notes

Basic Switch Concepts
A hub simply splits the Ethernet signal like a cable splitter
Broadcast storms happen when too many computers are trying to talk at once
Switches allow multiple computers to be able to talk at the same time.
Switches are OSI Model layer 2 devices and use network devices MAC Addresses for identification
Managed vs. Unmanaged Switches
Unmanaged switches are completely automatic
Managed switches can be configured
Speed
Speeds -- 10Mbps / 100Mbps / 1000Mbps
Full Duplex means a device can send and receive traffic at the same time
Half Duplex means a device can either receive or transmit traffic
Backplane determines how much total data a switch can handle
Trunk Connection allow multiple switches to be tied together
VLANs are separate LANs on the same switch
POE -- Power Over Ethernet allows you to power network devices using cat5 cable
QOS/ COS -- allows you to prioritize network packets so that real time communication is not interrupted by file transfers.
Spanning Tree Protocol is a networking protocol that helps prevent network loops

All Comments (21)
  • @dagda825
    Eli, I'm working on my network+ cert; you've taught me more about switches than TWO semesters at my local college. That speaks volumes for your teaching abilities.
  • @danijuhasz27
    Man, you're saving my exam 10 years after uploading the video!😄
  • Eli, I know this is an ancient video and you moved on to teaching different stuff loooong ago, but just want to express appreciation of your detailed approach. Your videos really stay in my mind, probably because you repeat what you said in few different ways and go into so much detail. Thanks a lot! Great help for someone with no technical background.
  • @jamespoda5621
    eli said "when you have 50 people in an office doing stupid staff""the network may fail!' that comment made my day
  • @MunkiiFtw
    i hope this guy makes youtube money, he deserves it
  • @UrielSepsis
    I'm in the process of retraining to become an IT systems technician. Somehow I understand your explanations way easier than my actual teachers explanation in class - I guess bilingual learning is not my thing (german XOR english). Your lessons are detailed and well structured while keeping it relaxed. You do iterations almost always where I need them so I don't have to skip back and forth =) Thank you very very much, sir!
  • @Firas95k
    Eli, I don't have enough words to thank you. The amount of information that you had shared in this video is enormous. GOD BLESS YOU!!!!!
  • @joeellison7898
    Great to listen to Eli and benefit from his wisdom. He's very kind to be going through all the trouble to produce these lessons. He must have a teacher's heart.
  • Well done. You make IT sound so easy. I got a promotion from help desk to network analysis and you really help me learn the basics. Thank you
  • Incredible! I came here getting an understanding of switches and routers as a newbie obtaining detailed info for my Comptia A+ and now I am hooked on your lectures. I am blown away with the knowledge. Thank you very much!
  • @loolehbaz
    great video. My 7 year old sat through 46 min of the video right next to me, 30 min past his bedtime. He said he is really a good teacher!!
  • @mrnobody1321
    8:10 Switches. osi level II Learns where each device is connected. (discovers the mac address) 15:30 Managed vs Unmanaged Switch Managed: allows extensive config. See below. 18:00 Speed 10, 100, 1000 Mb connections (should match the device speed) (managed) Set the hard code speed. If not, will do it automatically. 20:00 Duplex Half-duplex: listen or talks. (one signal at a time). Duplex: listen and talks (example: cellphone). 24:00 Backplain Before reaching another port, data goes through the backplain. It's like a highway. It needs to allow very high speed. 26:00 Trunk (for managed ports) Connect multiple switches. Uses fiber cable. 28:40 VLAN 31:00 PoE
  • @abdimohamed1554
    man you should be teaching my class. you would be my favorite teacher of all the time. great work eli you are the man!
  • @bitsofskin2088
    Eli, i love your videos man. You dont talk "DOWN" to people and you get the point across. You have great teaching ability. Thank you for your videos.
  • @jdiez7092
    I would like to give Eli a standing ovation, I am new to the IT field and I learned more in the first 15 minutes of this video then anywhere else.
  • @radusarbu6994
    simple is always the best way to learn ,without complication .I say GOOD JOB ELI
  • @Mastran77
    Got a big Job where i have to deploy a huge 20 IP cameras Surveillance System wich involves using Managed Switches, an i have never even touched a Switch before, this video came in very helpful...thank you, i like the warm way you explain, very sintetic
  • I just found a solution to one of my problems with my network! I needed to separate the Access Point at my dad's restaurant so that the customers won't be able to see all the other devices in the network. Yeah, I have the same connection for the restaurant and our house so that our customers can have wifi for their devices. Thank you so much dude, keep this awesome work up! ~Valk.
  • @Vexterian
    Can’t believe I actually watched the entire video. It is excellent learning for a newbie !