Computer Networks/Ethernet
This lesson introduces Ethernet networking.
Objectives and Skills
[edit | edit source]Objectives and skills for the Ethernet networking portion of Network+ certification include:[1]
- Given a scenario, deploy the appropriate wired connectivity standard
- Ethernet standards
- 10BaseT
- 100BaseT
- 1000BaseT
- 1000BaseTX
- 10GBaseT
- 100BaseFX
- 10Base2
- 10GBaseSR
- 10GBaseER
- 10GBaseSW
- IEEE 1905.1-2013
- Ethernet over HDMI
- Ethernet over power line
- Ethernet standards
- Given a scenario, implement and configure the appropriate addressing schema
- MAC addressing
- Explain the basics of network theory and concepts
- Numbering systems
- Binary
- Hexadecimal
- Octal
- Broadband/base band
- Bit rates vs baud rate
- Sampling size
- CDMA
- CSMA/CD and CSMA/CA
- Carrier detect/sense
- Wavelength
- Collision
- Numbering systems
Readings
[edit | edit source]- Wikipedia: Ethernet
- Wikipedia: Carrier sense multiple access with collision detection
- Wikipedia: MAC address
- Wikipedia: Binary number
- Wikipedia: Hexadecimal
Multimedia
[edit | edit source]- YouTube: Ethernet Standards - CompTIA Network+ N10-006 - 5.4
- YouTube: Network Fundamentals - CompTIA Network+ N10-006 - 5.2
- YouTube: Modulation Techniques - CompTIA Network+ N10-006 - 5.2
- YouTube: Hexadecimal Math - CompTIA Network+ N10-006 - 5.2
- YouTube: Octal Math - CompTIA Network+ N10-006 - 5.2
- YouTube: CSMA/CD and CSMA/CA - CompTIA Network+ N10-006 - 5.2
Activities
[edit | edit source]- Review Wikipedia: IEEE 802.3. Create a comparison table listing the following Ethernet standards. For each standard, note the media type, data rate, maximum distance, and year the standard was introduced.
- 10BaseT
- 100BaseT
- 1000BaseT
- 1000BaseTX
- 10GBaseT
- 100BaseFX
- 10Base2
- 10GBaseSR
- 10GBaseER
- 10GBaseSW
- Ethernet over HDMI
- Ethernet over power line
- Test Ethernet performance.
- Download the free TotuSoft: LAN Speed Test (Lite) network speed test program, or use a free Internet speed test site.
- Review Wikipedia: Duplex (telecommunications) and Home Network Help: Changing the Speed and Duplex Mode of Network Card in Microsoft Windows.
- Check the speed and duplex mode of the network adapter(s) in your system. Make a written note of the current settings. Test network speed and note the results.
- Experiment with changing the speed and duplex mode of your system to determine the impact of a slower connection using hubs (half duplex) rather than switches (full duplex). Test network speed and compare the results.
- Return your settings to the original values. Test network speed again to verify performance.
- Identify your network adapter's MAC address and manufacturer.
- Windows:
- Review Microsoft: Getmac. Use the
getmaccommand to display MAC addresses on your computer. - Review Microsoft: Ipconfig. Use the
ipconfig /allcommand to display MAC addresses on your computer. - Review Wikipedia: Organizationally unique identifier. Search the Internet for OUI lookup. Select a site and enter your MAC address to identify the manufacturer of your network adapter(s).
- Review Microsoft: Getmac. Use the
- macOS:
- Review macOS Daily: Find a MAC Address in macOS. Use System Preferences to display MAC addresses on your computer.
- Review macOS Daily: Find a MAC Address in macOS. Use the
networksetup -listallhardwareportscommand to display MAC addresses on your computer. - Review Wikipedia: Organizationally unique identifier. Search the Internet for OUI lookup. Select a site and enter your MAC address to identify the manufacturer of your network adapter(s).
- Linux:
- Review Linux.org: View and Change Linux MAC Addresses. Use the
ifconfigto display MAC addresses on your computer. - Review Wikipedia: Organizationally unique identifier. Search the Internet for OUI lookup. Select a site and enter your MAC address to identify the manufacturer of your network adapter(s).
- Review Linux.org: View and Change Linux MAC Addresses. Use the
- Android:
- Review Optimum: Finding the MAC Address on an Android Phone or Android Tablet. Use Settings to display MAC address on your device.
- Review Wikipedia: Organizationally unique identifier. Search the Internet for OUI lookup. Select a site and enter your MAC address to identify the manufacturer of your network adapter.
- iOS:
- Review macOS Daily: Find the iPhone MAC Address. Use Settings to display the MAC address on your device.
- Review Wikipedia: Organizationally unique identifier. Search the Internet for OUI lookup. Select a site and enter your MAC address to identify the manufacturer of your network adapter.
- Windows:
- Use a protocol analyzer to view an Ethernet frame.
- Review Wikipedia: Ethernet frame.
- Follow the instructions in Wireshark/Ethernet to capture and view an Ethernet frame.
- Advanced: Spoof a MAC address.
- Windows:
- Review Wikipedia: MAC spoofing and Wikibooks: Changing Your MAC Address.
- Review Online Tech Tips: Change or Spoof a MAC Address in Windows or macOS.
- Continue with All: below.
- macOS:
- Review Wikipedia: MAC spoofing and Wikibooks: Changing Your MAC Address.
- Review Online Tech Tips: Change or Spoof a MAC Address in Windows or macOS.
- Continue with All: below.
- Linux:
- Review Wikipedia: MAC spoofing and Wikibooks: Changing Your MAC Address.
- Review Linux.org: View and Change Linux MAC Addresses.
- Continue with All: below.
- All:
- Use one of the methods in the previous activity to identify the MAC address on your computer. Make a written note of the address.
- Change the MAC address to a new random address of your choosing. Test connectivity with the new address.
- Change the MAC address again, this time to match the address of another computer on your network. Note: This may disrupt network connectivity for one or both devices. Test connectivity with the new address.
- Change the MAC address back to the original value assigned by the manufacturer. Test connectivity with the restored address.
- Windows:
- Convert binary, decimal and hexadecimal numbers.
- Review MathsIsFun: Binary, Decimal and Hexadecimal Numbers and MathsIsFun: Binary to Decimal to Hexadecimal Converter.
- Experiment with converting decimal values to hexadecimal and binary, and then back to decimal again.
- Use your operating system's calculator or system commands. Perform simple math calculations in binary and hexadecimal. Convert the values to decimal to check your work.
- Windows GUI:
- macOS GUI:
- macOS Terminal:
- Linux Terminal: