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  1. #1

    questions about networking

    Hi, everybody
    I have two questions about networking, can you help me?
    1. How to get net_device by IP address?
    2. How to get MAC address by IP address if MAC address exist in cache?

    Thanks in advance!

  2. #2
    Linux Enthusiast meton_magis's Avatar
    Join Date
    Oct 2006
    I don't know what a net_device is, but I am gonna guess it is your nic card. you can tell that by running
    if it is active, it will tell you which device belongs to which IP.

    for the mac address, look up `arp`
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  3. #3
    Also see for nmap

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