In which scenario would ARP poisoning be a concern for network administrators?

  • When a router is upgraded
  • When a server goes down temporarily
  • When a switch is replaced
  • When an attacker tries to impersonate another device by poisoning the ARP cache
ARP poisoning is a concern when an attacker tries to impersonate another device on the network by poisoning the ARP cache of the target device. This can lead to man-in-the-middle attacks, where the attacker intercepts and potentially alters network traffic. Network administrators need to be vigilant in detecting and preventing ARP poisoning attacks.
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