How Hackers Cause Man-In-The-Middle Attacks

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The MIM [Man-in-the-Middle] attack results when a hacker convinces two other hosts (servers) that the host in the middle is a valid host. This can be accomplished with a DNS [Domain Name Spoof] if the attacked system is using DNS [Domain Name Server] to identify the other host or ARP [Address Resolution Protocol].

LAN switches keep a list of IP/MAC addresses in a table and upon an ARP/RARP request will reply with this information. Hackers can sniff (listen) to these addresses and replace them, delete them, or worse.

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