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Morningside Network Certification

Thanks for volunteering to participate in a network troubleshooting training session for our student workers. Excellent.

Skills and Areas of Competency

  1. OSI Network Layers (Focus: Layers 1, 2, and 3)
    • (One) Physical
      • Cable termination skills
      • Cable testing (Fluke network tester)
      • Labeling and organization (EIA-TIA-606-A)
      • Link speed auto-negotiation (Duplex mismatch?)
      • Cabling considerations
        • Cable Closets
        • Horizontal + Vertical cabling
        • Extra credit: Building code / Best-practices
    • (Two) Data-Link
      • “Do you have a link?”
      • VLANs (“colors”) / Broadcast domains
        • Affects: Apple TVs, Zero-Config devices, other “consumer” devices
    • (Three) Network
      • TCP/IP
        • Basic Subnetting - Subnet masks and addresses
        • Basic Routing - Default gateways
      • SwitchConfiguration (pending something like RADIUS authentication for switch management.)

      • DNS and Netreg
    • Handwave over remaining layers: (Four) Transport, (Five) Session, (Six) Presentation, (Seven) Application
    • Understand devices:
      • End-user devices
        • Computer
        • Printer
      • Network devices
        • Repeaters
        • Hubs
        • Bridges
        • Switches
        • Routers
        • Firewall
    • Understand ideas:
      • NIC
      • MAC
      • Data-Link
      • Broadcast Domain
      • Bandwidth
      • flooding
      • frame
      • packet
  2. Administration
    • PC Setup / Configuration basics
      • Find the IP configuration
        • IP address, netmask, DNS server, and default gateway (PC / Apple)
        • Static or DHCP configuration?
      • Find the MAC address (PC / Apple)
      • Find the physical interface configuration (Duplex, etc)
    • General setup
      • Adding / Removing / Finding netreg entries
      • Ex: Network printer diagnostics
    • Big-Picture
  3. Putting it all together
    • Network problem - Where do you start to troubleshoot?
      • Check your assumptions
        • Corollary: Eyewitness testimony is unreliable, test for yourself or "Trust, but verify."

      • Quickly isolate the problem by working up the layers.
      • Under construction:
        • Network Documentation
        • Labeling standards
        • Procedures
  4. Examples
    • A user calls, “My wall port doesn’t work”
    • 10 users call: “The internet is down”
      • Chances of the Internet itself being down: nearly 0. What could be stopping them from accessing the internet?
        • Commonalities? Same building, same computer, same software, same website…
        • Does it work for you?
          • No - Troubleshoot your own system
          • Yes - Work both directions to find where the system isn’t working
    • A user calls, “We’re having trouble with a network printer (or other device)”

MorningsideNetworkCertification (last edited 2013-12-17 13:36:14 by meyersh)