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IP address fundamentals

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What is an IP address?

  • An IP address, or Internet Protocol address, is a series of numbers that identifies any device or computer on a network

  • IP addresses are used by devices to communicate with each other over the Internet and on local networks

  • Every device must have an IP address to communicate

  • Devices can only communicate with each other on a network if they have similar IP addresses

  • IP addresses must be unique, no 2 devices can have the same IP address

  • Computers will have 2 IP addresses

    • One for the Ethernet connection

    • One for the wifi connection

How does a device obtain an IP address

  • Automatically (Setting = Auto)

    • The IP address is automatically obtained from a router when the device is connected to the network

    • The IP address can change every time the device is connected to the network (often it does not)

    • Usually automatically obtained IP addresses are in the format 192.168.xxx.xxx

  • Self Assigned (Setting = Auto)

    • If the setting is Auto and there is no router on the network the device will ‘self-assign’ an IP address

    • This IP address will change every time

    • Self assigned IP addresses always begin 169.254.xxx.xxx

  • Manually assigned (Setting = Manual or Static or Not Auto)

    • IP address has been manually assigned to the computer by a person

    • A static IP address will never change

    • Most static IP addresses have the format 192.168.xxx.xxx

How to find the IP address on your computer

  • Go to the Search bar at the bottom of the computer screen

  • Type “CMD”

  • A black box will open

  • Type “ipconfig” in the black box

  • The computer IP address can be seen under

    • Ethernet adapter; OR,

    • Wireless LAN Adapter

How to find the IP address on a MYLAPS decoder

  • Press the right hand button on the front of the decoder

  • Read the IP address from the screen

Troubleshooting

  • Check the IP address of the decoder and the computer are similar

  • For self assigned IP addresses the first 2 segments must be the same i.e 169.254.xxx.xxx

  • For Automatically or manually assigned IP addresses the first 3 segments must be the same i.e. 192.168.1.xxx

  • If they are not the same then this is likely to be the problem

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