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IP Telephony offers users the ability to log-on anywhere in the world. Although this offers mobile workers great advantages, it presents new challenges for system administrators who need to ensure that they only allow authorized users into their enterprise network. The standard 802.1x provides an authentication process verifying that only permitted devices are allowed onto the network. In addition to sup-porting security, 802.1x also reduces costs by simplifying adds / moves / changes and allows employees to more easily change locations. This paper discusses the reasons customers ask for 802.1x, the technical principles of 802.1x, and the methods for deploying 802.1x certificates on end devices.
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