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Certified Ethical Hacker (CEH) Practice Question

While performing an on-site assessment you find that all switch ports run 802.1X. Non-802.1X devices such as printers are allowed onto the production VLAN through MAC Authentication Bypass (MAB). You capture traffic from a nearby authorized printer. Which technique will most reliably give your laptop full network access without valid 802.1X credentials?

  • Launch a DHCP starvation attack and serve internal addresses from a rogue DHCP server.

  • Change your NIC to the printer's MAC address and reconnect so the switch passes MAB.

  • Transmit forged EAPOL-Logoff frames to knock the printer offline and keep the port open.

  • Send double-tagged Ethernet frames to hop from the guest VLAN into the production VLAN.

Certified Ethical Hacker (CEH)
Network and Perimeter Hacking
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