Describe 802.1X and explain what was used before 802.1X and the issues associated with it.
What will be an ideal response?
802.1X is a port-based authentication network access control mechanism for networks. In other words, it's a complete authentication standard designed to force devices to go through a full AAA process to get anywhere past the interface on a gateway system. Before 802.1X, a system on a wired network could always access another system's port. Granted, an attacker wouldn't be able to do much until he gave a user name/password or certificate, but he could still send packets to any computer on the network. This wasn't good because it enabled attackers to get to the systems to try to do evil things. 802.1X prevented them from even getting in the door until they were authenticated and authorized.
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